[User] Comment implémenter le Decorator en Python ? (exemple 2219)

[Assistant]
from functools import wraps

def logger(func):
    @wraps(func)
    def wrapper(*args, **kwargs):
        print(f"Appel de {func.__name__}")
        return func(*args, **kwargs)
    return wrapper

@logger
def add(a, b):
    return a + b

print(add(3, 4))


[User] Comment créer un index dans Elasticsearch ? (exemple 2220)

[Assistant]
PUT /commandes
{
  "settings": {
    "number_of_shards": 5,
    "number_of_replicas": 0
  }
}

PUT /commandes/_doc/1
{
  "name": "Article 1",
  "description": "Erreur système",
  "price": 999.99,
  "tags": ["tech"]
}

GET /commandes/_search
{
  "query": {
    "match": { "name": "erreur" }
  }
}


[User] Comment définir une dataclass Python ? (exemple 2221)

[Assistant]
from dataclasses import dataclass

@dataclass
class Utilisateur:
    name: str
    price: float = 0.0
    tags: list[str] = None

    def __post_init__(self):
        if self.tags is None:
            self.tags = []


[User] Comment paralléliser un calcul avec Rayon ? (exemple 2222)

[Assistant]
use rayon::prelude::*;

fn main() {
    let numbers: Vec<i32> = (1..1000).collect();
    let sum: i32 = numbers.par_iter().map(|x| x * x).sum();
    println!("Somme: {}", sum);
}


[User] Comment créer une validation avec Zod ? (exemple 2223)

[Assistant]
import { z } from 'zod';

const CommentSchema = z.object({
  email: z.string().email(),
  age: z.number().positive().int(),
  name: z.string().min(2).max(50),
});

type Comment = z.infer<typeof CommentSchema>;

const result = CommentSchema.safeParse({ email: 'bob@test.com', age: 25, name: 'Comment' });


[User] Comment créer un modèle avec Pydantic v2 ? (exemple 2224)

[Assistant]
from pydantic import BaseModel, Field, EmailStr

class ProductDTO(BaseModel):
    name: str = Field(min_length=1, max_length=100)
    email: EmailStr
    age: int = Field(gt=0, lt=150)
    tags: list[str] = []

    model_config = {'extra': 'forbid'}


[User] Comment utiliser useState en React ? (exemple 2225)

[Assistant]
import React, { useState, useEffect } from 'react';

function LecteurVideo() {
  const [data, setData] = useState(null);

  useEffect(() => {
    fetch('/api/donnees')
      .then(r => r.json())
      .then(setData);
  }, []);

  return <div>{data ? JSON.stringify(data) : 'Chargement...'}</div>;
}


[User] Comment implémenter l'architecture hexagonale ? (exemple 2226)

[Assistant]
# domain/ports.py
from abc import ABC, abstractmethod

class UserRepository(ABC):
    @abstractmethod
    def save(self, user): pass

# domain/services.py
class UserService:
    def __init__(self, repo: UserRepository):
        self.repo = repo

    def create_user(self, name: str):
        user = {"name": name}
        self.repo.save(user)
        return user

# infrastructure/postgres_repo.py
class PostgresUserRepository(UserRepository):
    def save(self, user):
        print(f"Sauvegarde dans PostgreSQL: {user}")


[User] Comment utiliser en Go ? (exemple 2227)

[Assistant]
package main

import "fmt"

func Contient[T any](items []T) T {
	return items[0]
}

func main() {
	fmt.Println(Contient([]int{1, 2, 3}))
	fmt.Println(Contient([]string{"a", "b", "c"}))
}


[User] Comment éviter les data races en Go ? (exemple 2228)

[Assistant]
package main

import (
	"fmt"
	"sync"
)

type Counter struct {
	mu sync.Mutex
	n  int
}

func (c *Counter) Ajouter() {
	c.mu.Lock()
	defer c.mu.Unlock()
	c.n++
}

func main() {
	var c Counter
	var wg sync.WaitGroup
	for i := 0; i < 1000; i++ {
		wg.Add(1)
		go func() {
			defer wg.Done()
			c.Ajouter()
		}()
	}
	wg.Wait()
	fmt.Println(c.n)
}


[User] Comment créer une API REST avec Actix-Web ? (exemple 2229)

[Assistant]
use actix_web::{get, web, App, HttpResponse, HttpServer, Responder};

#[get("/api/donnees")]
async fn lister_produits() -> impl Responder {
    HttpResponse::Ok().json({ message: "Bonjour Actix" })
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    HttpServer::new(|| App::new().service(lister_produits))
        .bind(("127.0.0.1", 3000))?
        .run()
        .await
}


[User] Comment gérer un formulaire en React ? (exemple 2230)

[Assistant]
import React, { useState, useEffect } from 'react';

function GalerieImages() {
  const [data, setData] = useState(null);

  useEffect(() => {
    fetch('/api/produits')
      .then(r => r.json())
      .then(setData);
  }, []);

  return <div>{data ? JSON.stringify(data) : 'Chargement...'}</div>;
}


[User] Comment créer une base de données dans MySQL ? (exemple 2231)

[Assistant]
CREATE TABLE paiements (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    email VARCHAR(255) UNIQUE,
    price DECIMAL(10,2) DEFAULT 0.00,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;


[User] Comment concevoir en Go ? (exemple 2232)

[Assistant]
package main

import "fmt"

type Notificateur interface {
	Notifier() string
}

type AnalyseurCSV struct {
	name string
}

func (s AnalyseurCSV) Notifier() string {
	return s.name
}

func main() {
	var i Notificateur
	i = AnalyseurCSV{name: "Sauvegardé"}
	fmt.Println(i.Notifier())
}


[User] Comment créer en Go ? (exemple 2233)

[Assistant]
package main

import (
	"testing"
)

func TestMethod(t *testing.T) {
	result := traitement("entree")
	expected := "traité"
	if result != expected {
		t.Errorf("obtenu {}, attendu {}", result, expected)
	}
}


[User] Comment définir une énumération en Rust ? (exemple 2234)

[Assistant]
enum Etat {
    EnAttente(u8),
    Vert(u8),
    Bleu,
}

fn process(val: Etat) {
    match val {
        Etat::EnAttente(v) => println!("Var1: {}", v),
        Etat::Vert(v) => println!("Var2: {}", v),
        Etat::Bleu => println!("Var3"),
    }
}


[User] Comment implémenter le tri fusion en Python ? (exemple 2235)

[Assistant]
def tri_fusion(arr):
    if len(arr) <= 1:
        return arr
    milieu = len(arr) // 2
    gauche = tri_fusion(arr[:milieu])
    droite = tri_fusion(arr[milieu:])
    return fusion(gauche, droite)

def fusion(g, d):
    result = []
    i = j = 0
    while i < len(g) and j < len(d):
        if g[i] < d[j]:
            result.append(g[i]); i += 1
        else:
            result.append(d[j]); j += 1
    result.extend(g[i:] or d[j:])
    return result

print(tri_fusion([38, 27, 43, 3, 9, 82, 10]))


[User] Comment sérialiser un objet avec Pydantic v2 ? (exemple 2236)

[Assistant]
from pydantic import BaseModel, Field, EmailStr

class CommentIn(BaseModel):
    name: str = Field(min_length=1, max_length=100)
    email: EmailStr
    age: int = Field(gt=0, lt=150)
    tags: list[str] = []

    model_config = {'extra': 'forbid'}


[User] Comment implémenter le Singleton en Python ? (exemple 2237)

[Assistant]
class Singleton:
    _instance = None

    def __new__(cls):
        if cls._instance is None:
            cls._instance = super().__new__(cls)
        return cls._instance

    def __init__(self):
        self.value = None

# Test
s1 = Singleton()
s1.value = 42
s2 = Singleton()
print(s2.value)  # 42


[User] Comment résoudre Two Sum en Python ? (exemple 2238)

[Assistant]
def two_sum(nums, cible):
    vue = {}
    for i, n in enumerate(nums):
        complement = cible - n
        if complement in vue:
            return [vue[complement], i]
        vue[n] = i
    return []

print(two_sum([2, 7, 11, 15], 6))


[User] Comment implémenter le Repository en Python ? (exemple 2239)

[Assistant]
from abc import ABC, abstractmethod
from typing import List, Optional

class Repository(ABC):
    @abstractmethod
    def find_by_id(self, id: int): pass

    @abstractmethod
    def save(self, entity): pass

class PostgresRepository(Repository):
    def find_by_id(self, id: int):
        # SELECT * FROM entities WHERE id = ?
        return {"id": id, "name": "exemple"}

    def save(self, entity):
        # INSERT INTO entities ...
        print(f"Sauvegardé: {entity}")


[User] Comment compiler du TypeScript avec esbuild ? (exemple 2240)

[Assistant]
const esbuild = require('esbuild');

esbuild.build({
  entryPoints: ['src/index.js'],
  bundle: true,
  outfile: 'build/app.js',
  platform: 'neutral',
  target: ['node16'],
}).catch(() => process.exit(1));


[User] Comment utiliser Optional en Java ? (exemple 2241)

[Assistant]
import java.util.Optional;

public class Main {
    public static void main(String[] args) {
        Optional<String> opt = Optional.ofNullable("");
        String result = opt
            .filter(s -> s.length() > 2)
            .map(String::toUpperCase)
            .orElse("valeur par défaut");
        System.out.println(result);
    }
}


[User] Comment vérifier si une chaîne est un palindrome ? (exemple 2242)

[Assistant]
def est_palindrome(s):
    s = s.lower().replace(' ', '')
    return s == s[::-1]

print(est_palindrome('radar'))

# Version sans inversion
def est_palindrome_deux_pointeurs(s):
    g, d = 0, len(s) - 1
    while g < d:
        if s[g] != s[d]:
            return False
        g += 1; d -= 1
    return True


[User] Comment parcourir en parallèle avec Rayon ? (exemple 2243)

[Assistant]
use rayon::prelude::*;

fn main() {
    let numbers: Vec<i32> = (1..100).collect();
    let sum: i32 = numbers.par_iter().map(|x| x * x).sum();
    println!("Somme: {}", sum);
}


[User] Comment ajouter un index dans PostgreSQL ? (exemple 2244)

[Assistant]
CREATE TABLE profils (
    id SERIAL PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    email VARCHAR(255) UNIQUE,
    price NUMERIC(10,2) DEFAULT 0,
    created_at TIMESTAMP DEFAULT NOW(),
    updated_at TIMESTAMP DEFAULT NOW()
);

CREATE INDEX idx_profils_name ON profils(name);


[User] Comment implémenter un Record en Java ? (exemple 2245)

[Assistant]
public record EnregistrementUtilisateur(Long id, String name, double price) {
    public EnregistrementUtilisateur {
        if (price < 0) throw new IllegalArgumentException("Prix négatif");
    }
}

// Utilisation
var item = new EnregistrementUtilisateur(1L, "Widget", 1.99);
System.out.println(item.name() + " coûte " + item.price());


[User] Comment empaqueter une application avec Helm ? (exemple 2246)

[Assistant]
apiVersion: v2
name: backend
description: Application principale
type: application
version: 2.3.0
appVersion: "2.0"

dependencies:
  - name: redis
    version: 17.3.0
    repository: https://charts.helm.sh/stable


[User] Comment implémenter la Factory en Python ? (exemple 2247)

[Assistant]
from abc import ABC, abstractmethod

class Product(ABC):
    @abstractmethod
    def operation(self): pass

class ConcreteProductA(Product):
    def operation(self): return "Produit A"

class ConcreteProductB(Product):
    def operation(self): return "Produit B"

class Factory:
    @staticmethod
    def create(product_type: str) -> Product:
        if product_type == "A":
            return ConcreteProductA()
        elif product_type == "B":
            return ConcreteProductB()
        raise ValueError(f"Type inconnu: {product_type}")


[User] Comment utiliser EventEmitter avec Node.js ? (exemple 2248)

[Assistant]
const { exec } = require('fs/promises');

async function traiterStream() {
  try {
    const result = await exec('./dossier', 'utf-8');
    console.log(result);
  } catch (err) {
    console.error(err);
  }
}

traiterStream();


[User] Comment mettre en place l'architecture hexagonale ? (exemple 2249)

[Assistant]
# domain/ports.py
from abc import ABC, abstractmethod

class UserRepository(ABC):
    @abstractmethod
    def save(self, user): pass

# domain/services.py
class UserService:
    def __init__(self, repo: UserRepository):
        self.repo = repo

    def create_user(self, name: str):
        user = {"name": name}
        self.repo.save(user)
        return user

# infrastructure/postgres_repo.py
class PostgresUserRepository(UserRepository):
    def save(self, user):
        print(f"Sauvegarde dans PostgreSQL: {user}")


[User] Comment implémenter la recherche binaire en Python ? (exemple 2250)

[Assistant]
def recherche_binaire(arr, cible):
    debut, fin = 0, len(arr) - 1
    while debut <= fin:
        milieu = (debut + fin) // 2
        if arr[milieu] == cible:
            return milieu
        elif arr[milieu] < cible:
            debut = milieu + 1
        else:
            fin = milieu - 1
    return -1

print(recherche_binaire([1, 3, 5, 7, 9, 11, 13], 7))


[User] Comment utiliser les durées de vie en Rust ? (exemple 2251)

[Assistant]
fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
    if x.len() > y.len() { x } else { y }
}

fn main() {
    let a = String::from("data");
    let b = String::from("langage");
    let result = longest(&a, &b);
    println!("Le plus long est: {}", result);
}


[User] Comment définir un context manager en Python ? (exemple 2252)

[Assistant]
from contextlib import contextmanager

@contextmanager
def configuration_env():
    print('entrée')
    yield 'chemin changé'
    print('sortie')

with configuration_env() as cm:
    print(cm)


[User] Comment implémenter DFS en Python ? (exemple 2253)

[Assistant]
def dfs(graphe, noeud, visites=None):
    if visites is None:
        visites = set()
    visites.add(noeud)
    print(noeud, end=' ')
    for voisin in graphe[noeud]:
        if voisin not in visites:
            dfs(graphe, voisin, visites)

dfs({
    'A': ['B', 'C'],
    'B': ['A', 'D', 'E'],
    'C': ['A', 'F'],
    'D': ['B'],
    'E': ['B', 'F'],
    'F': ['C', 'E']
}, 'A')


[User] Comment créer une table avec SQLite ? (exemple 2254)

[Assistant]
CREATE TABLE taches (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    name TEXT NOT NULL,
    price REAL NOT NULL DEFAULT 0,
    created_at TEXT DEFAULT (datetime('now'))
);

INSERT INTO taches (name, price) VALUES ('Widget', 9.99);
SELECT * FROM taches WHERE price > 5 ORDER BY name;


[User] Comment gérer le cache avec TanStack Query ? (exemple 2255)

[Assistant]
import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';

function TableauBord() {
  const queryClient = useQueryClient();

  const { data, isLoading } = useQuery({
    queryKey: ['profil'],
    queryFn: () => fetch('/api/utilisateurs').then(r => r.json()),
  });

  const mutation = useMutation({
    mutationFn: (newData) => fetch('/api/utilisateurs', {
      method: 'POST',
      body: JSON.stringify(newData),
    }),
    onSuccess: () => queryClient.invalidateQueries({ queryKey: ['profil'] }),
  });

  if (isLoading) return
Chargement...
;
  return
{data && JSON.stringify(data)}
;
}


[User] Comment structurer un projet Rust ? (exemple 2256)

[Assistant]
# Cargo.toml
[package]
name = "pipeline_donnees"
version = "0.1.0"
edition = "2021"

[dependencies]
regex = "1.7"


[User] Comment analyser des données avec Pandas ? (exemple 2257)

[Assistant]
import pandas as pd

df = pd.DataFrame({
    'nom': ['Alice', 'Bob', 'Charlie'],
    'valeur': [100, 200, 300]
})
print(df.describe())
print(df.groupby('nom').mean())


[User] Comment implémenter le tri à bulles en Python ? (exemple 2258)

[Assistant]
def tri_bulle(arr):
    n = len(arr)
    for i in range(n):
        for j in range(0, n - i - 1):
            if arr[j] > arr[j + 1]:
                arr[j], arr[j + 1] = arr[j + 1], arr[j]
    return arr

print(tri_bulle([3, 1, 2]))


[User] Comment configurer en Go ? (exemple 2259)

[Assistant]
package main

import (
	"context"
	"fmt"
	"time"
)

func main() {
	ctx, cancel := context.WithTimeout(context.Background(), 500*time.Millisecond)
	defer cancel()

	select {
	case <-time.After(1500*time.Millisecond):
		fmt.Println("traitement effectué")
	case <-ctx.Done():
		fmt.Println("Timeout:", ctx.Err())
	}
}


[User] Comment créer en Go ? (exemple 2260)

[Assistant]
package main

import (
	"testing"
)

func TestAddition(t *testing.T) {
	result := methode()
	expected := "bonjour tout le monde"
	if result != expected {
		t.Errorf("obtenu {}, attendu {}", result, expected)
	}
}


[User] Comment implémenter DFS en Python ? (exemple 2261)

[Assistant]
def dfs(graphe, noeud, visites=None):
    if visites is None:
        visites = set()
    visites.add(noeud)
    print(noeud, end=' ')
    for voisin in graphe[noeud]:
        if voisin not in visites:
            dfs(graphe, voisin, visites)

dfs({
    'A': ['B', 'C'],
    'B': ['A', 'D', 'E'],
    'C': ['A', 'F'],
    'D': ['B'],
    'E': ['B', 'F'],
    'F': ['C', 'E']
}, 'A')


[User] Comment utiliser SQLite avec SQLite ? (exemple 2262)

[Assistant]
CREATE TABLE notes (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    name TEXT NOT NULL,
    price REAL NOT NULL DEFAULT 0,
    created_at TEXT DEFAULT (datetime('now'))
);

INSERT INTO notes (name, price) VALUES ('Alice', 0);
SELECT * FROM notes WHERE price > 10 ORDER BY name;


[User] Comment stocker des données avec Redis ? (exemple 2263)

[Assistant]
redis-cli SETEX verrou:tache_1 86400 "10_req/s"
redis-cli GET verrou:tache_1
redis-cli TTL verrou:tache_1
redis-cli EXPIRE verrou:tache_1 3600
redis-cli INCR verrou:counter


[User] Comment définir un context manager en Python ? (exemple 2264)

[Assistant]
from contextlib import contextmanager

@contextmanager
def gestionnaire_fichier():
    print('entrée')
    yield 'ressource verrouillée'
    print('sortie')

with gestionnaire_fichier() as cm:
    print(cm)


[User] Comment créer un serveur HTTP avec Node.js ? (exemple 2265)

[Assistant]
const { on } = require('fs');

async function gererEvenement() {
  try {
    const result = await on('./dossier', 'hex');
    console.log(result);
  } catch (err) {
    console.error(err);
  }
}

gererEvenement();


[User] Comment servir des fichiers statiques avec Nginx ? (exemple 2266)

[Assistant]
server {
    listen 80;
    server_name exemple.com;

    location / {
        proxy_pass http://backend:8000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }

    location /static/ {
        alias /var/www/mon-app/;
        expires 30d;
    }
}


[User] Comment implémenter le tri à bulles en Python ? (exemple 2267)

[Assistant]
def tri_bulle(arr):
    n = len(arr)
    for i in range(n):
        for j in range(0, n - i - 1):
            if arr[j] > arr[j + 1]:
                arr[j], arr[j + 1] = arr[j + 1], arr[j]
    return arr

print(tri_bulle([10, 7, 8, 9, 1, 5]))


[User] Comment mettre en place l'Event Sourcing ? (exemple 2268)

[Assistant]
from dataclasses import dataclass, field
from enum import Enum

class EventType(Enum):
    CREATED = "CREATED"
    UPDATED = "UPDATED"
    DELETED = "DELETED"

@dataclass
class Event:
    type: EventType
    data: dict
    version: int = 1

class EventStore:
    def __init__(self):
        self.events = []

    def append(self, event: Event):
        self.events.append(event)

    def replay(self, aggregate_id: str):
        return [e for e in self.events if e.data.get("id") == aggregate_id]


[User] Comment tester un formulaire avec Playwright ? (exemple 2269)

[Assistant]
import { test, expect } from '@playwright/test';

test('soumission formulaire', async ({ page }) => {
  await page.goto('https://exemple.com');
  await page.fill('#nom', 'mot de passe');
  await page.click('.rechercher-btn');
  await expect(page.locator('.alerte')).toContainText('Résultats pour');
});


[User] Comment utiliser l'architecture hexagonale ? (exemple 2270)

[Assistant]
# domain/ports.py
from abc import ABC, abstractmethod

class UserRepository(ABC):
    @abstractmethod
    def save(self, user): pass

# domain/services.py
class UserService:
    def __init__(self, repo: UserRepository):
        self.repo = repo

    def create_user(self, name: str):
        user = {"name": name}
        self.repo.save(user)
        return user

# infrastructure/postgres_repo.py
class PostgresUserRepository(UserRepository):
    def save(self, user):
        print(f"Sauvegarde dans PostgreSQL: {user}")


[User] Comment implémenter Fibonacci par programmation dynamique ? (exemple 2271)

[Assistant]
def fibonacci_dp(n):
    if n <= 1:
        return n
    dp = [0] * (n + 1)
    dp[1] = 1
    for i in range(2, n + 1):
        dp[i] = dp[i-1] + dp[i-2]
    return dp[n]

print(fibonacci_dp(30))


[User] Comment implémenter BFS en Python ? (exemple 2272)

[Assistant]
from collections import deque

def bfs(graphe, depart):
    visites = set()
    file = deque([depart])
    visites.add(depart)

    while file:
        noeud = file.popleft()
        print(noeud, end=' ')
        for voisin in graphe[noeud]:
            if voisin not in visites:
                visites.add(voisin)
                file.append(voisin)

bfs({
    'A': ['B', 'C'],
    'B': ['A', 'D', 'E'],
    'C': ['A', 'F'],
    'D': ['B'],
    'E': ['B', 'F'],
    'F': ['C', 'E']
}, '1')


[User] Comment implémenter la recherche binaire en Python ? (exemple 2273)

[Assistant]
def recherche_binaire(arr, cible):
    debut, fin = 0, len(arr) - 1
    while debut <= fin:
        milieu = (debut + fin) // 2
        if arr[milieu] == cible:
            return milieu
        elif arr[milieu] < cible:
            debut = milieu + 1
        else:
            fin = milieu - 1
    return -1

print(recherche_binaire([2, 4, 6, 8, 10, 12, 14, 16], 9))


[User] Comment traiter avec en Java ? (exemple 2274)

[Assistant]
import java.util.List;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) {
        List<Integer> numbers = List.of(3, 6, 9, 12);
        List<Integer> result = numbers.stream()
            .filter(n -> n % 2 == 0)
            .map(n -> n * 3)
            .sorted()
            .collect(Collectors.toList());
        System.out.println(result);
    }
}


[User] Comment créer une page dynamique avec Next.js App Router ? (exemple 2275)

[Assistant]
// app/utilisateurs/page.tsx
export default async function PageAPropos() {
  const data = await fetch('https://api.exemple.com/posts');
  const json = await data.json();
  return <h1>{json.titre}</h1>;
}


[User] Comment nettoyer des fichiers avec pathlib ? (exemple 2276)

[Assistant]
from pathlib import Path

def organiser_fichiers():
    base = Path('output')
    base.mkdir(parents=True, exist_ok=True)
    file = base / 'donnees.csv'
    file.write_text('résultat de l'analyse')
    return file.read_text()


[User] Comment créer une collection avec MongoDB ? (exemple 2277)

[Assistant]
use('analytics');
db.produits.createIndex({ name: 1, price: -1 });

db.produits.insertOne({
  name: "Laptop",
  price: 999.99,
  tags: ["systeme"],
  inStock: true
});

db.produits.find({ price: { $gt: 0 } }).sort({ name: 1 }).limit(10);


[User] Comment créer une table dans MySQL ? (exemple 2278)

[Assistant]
CREATE TABLE etiquettes (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    email VARCHAR(255) UNIQUE,
    price DECIMAL(10,2) DEFAULT 0.00,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;


[User] Comment configurer GitLab CI dans GitLab CI ? (exemple 2279)

[Assistant]
stages:
  - build
  - deploy

lint_job:
  stage: build
  image: alpine:3.11-slim
  script:
    - echo "Exécution des tests"
    - eslint .
  only:
    - master


[User] Comment implémenter le tri rapide en Python ? (exemple 2280)

[Assistant]
def tri_rapide(arr):
    if len(arr) <= 1:
        return arr
    pivot = arr[len(arr) // 2]
    gauche = [x for x in arr if x < pivot]
    milieu = [x for x in arr if x == pivot]
    droite = [x for x in arr if x > pivot]
    return tri_rapide(gauche) + milieu + tri_rapide(droite)

print(tri_rapide([10, 7, 8, 9, 1, 5]))


[User] Comment créer un bundle avec Webpack ? (exemple 2281)

[Assistant]
// webpack.config.js
const path = require('path');

module.exports = {
  entry: './src/main.tsx',
  output: {
    path: path.resolve(__dirname, 'build'),
    filename: 'main.js',
  },
  module: {
    rules: [
      { test: /\.js$/, use: 'file-loader' },
    ],
  },
};


[User] Comment implémenter le pattern Observer en Python ? (exemple 2282)

[Assistant]
class Subject:
    def __init__(self):
        self._observers = []

    def attach(self, observer):
        self._observers.append(observer)

    def notify(self, data):
        for obs in self._observers:
            obs.update(data)

class ConcreteObserver:
    def __init__(self, name):
        self.name = name

    def update(self, data):
        print(f"{self.name} a reçu: {data}")


[User] Comment créer un composant dans Angular ? (exemple 2283)

[Assistant]
import { Component, Input, Output, EventEmitter } from '@angular/core';

@Component({
  selector: 'app-navigation',
  template: '<p>{ title }</p>'
})
export class ProduitComponent {
  @Input() title = 'Bienvenue';
  @Output() clicked = new EventEmitter<string>();

  handleClick() {
    this.clicked.emit(this.title);
  }
}


[User] Comment implémenter une route avec Spring Boot ? (exemple 2284)

[Assistant]
@RestController
@RequestMapping("/api/recherche")
public class VersionController {

    @GetMapping
    public ResponseEntity<String> getCommande() {
        return ResponseEntity.ok("Résultats de recherche");
    }

    @PostMapping
    public ResponseEntity<String> create(@RequestBody String body) {
        return ResponseEntity.status(201).body(body);
    }
}


[User] Comment automatiser avec dans GitLab CI ? (exemple 2285)

[Assistant]
stages:
  - test
  - security

build_job:
  stage: test
  image: node:18-alpine
  script:
    - echo "Exécution des tests"
    - trivy scan .
  only:
    - main


[User] Comment implémenter la Factory en Python ? (exemple 2286)

[Assistant]
from abc import ABC, abstractmethod

class Product(ABC):
    @abstractmethod
    def operation(self): pass

class ConcreteProductA(Product):
    def operation(self): return "Produit A"

class ConcreteProductB(Product):
    def operation(self): return "Produit B"

class Factory:
    @staticmethod
    def create(product_type: str) -> Product:
        if product_type == "A":
            return ConcreteProductA()
        elif product_type == "B":
            return ConcreteProductB()
        raise ValueError(f"Type inconnu: {product_type}")


[User] Comment créer une clé avec Redis ? (exemple 2287)

[Assistant]
redis-cli SETEX file_attente:abc 3600 "{"nom":"Alice"}"
redis-cli GET file_attente:abc
redis-cli TTL file_attente:abc
redis-cli EXPIRE file_attente:abc 7200
redis-cli INCR file_attente:counter


[User] Comment implémenter la recherche binaire en Python ? (exemple 2288)

[Assistant]
def recherche_binaire(arr, cible):
    debut, fin = 0, len(arr) - 1
    while debut <= fin:
        milieu = (debut + fin) // 2
        if arr[milieu] == cible:
            return milieu
        elif arr[milieu] < cible:
            debut = milieu + 1
        else:
            fin = milieu - 1
    return -1

print(recherche_binaire([1, 3, 5, 7, 9, 11, 13], 10))


[User] Comment mettre en place l'architecture hexagonale ? (exemple 2289)

[Assistant]
# domain/ports.py
from abc import ABC, abstractmethod

class UserRepository(ABC):
    @abstractmethod
    def save(self, user): pass

# domain/services.py
class UserService:
    def __init__(self, repo: UserRepository):
        self.repo = repo

    def create_user(self, name: str):
        user = {"name": name}
        self.repo.save(user)
        return user

# infrastructure/postgres_repo.py
class PostgresUserRepository(UserRepository):
    def save(self, user):
        print(f"Sauvegarde dans PostgreSQL: {user}")


[User] Comment implémenter la Factory en Python ? (exemple 2290)

[Assistant]
from abc import ABC, abstractmethod

class Product(ABC):
    @abstractmethod
    def operation(self): pass

class ConcreteProductA(Product):
    def operation(self): return "Produit A"

class ConcreteProductB(Product):
    def operation(self): return "Produit B"

class Factory:
    @staticmethod
    def create(product_type: str) -> Product:
        if product_type == "A":
            return ConcreteProductA()
        elif product_type == "B":
            return ConcreteProductB()
        raise ValueError(f"Type inconnu: {product_type}")


[User] Comment concevoir en Go ? (exemple 2291)

[Assistant]
package main

import "fmt"

type Validateur interface {
	EmettreSon() string
}

type Chat struct {
	name string
}

func (s Chat) EmettreSon() string {
	return s.name
}

func main() {
	var i Validateur
	i = Chat{name: "Sauvegardé"}
	fmt.Println(i.EmettreSon())
}


[User] Comment définir un décorateur Python ? (exemple 2292)

[Assistant]
from functools import wraps

def validate(fn):
    @wraps(fn)
    def wrapper(*args, **kwargs):
        print('Début')
        return fn(*args, **kwargs)
    return wrapper

@validate
def example():
    pass


[User] Comment définir un modèle avec Prisma ? (exemple 2293)

[Assistant]
// schema.prisma
model Profile {
  id        Int      @id @default(autoincrement())
  email     String   @unique
  name      String?
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
}

// usage
import { PrismaClient } from '@prisma/client';
const prisma = new PrismaClient();
const user = await prisma.category.create({
  data: { email: 'user@service.com', name: 'Utilisateur' }
});


[User] Comment écrire un décorateur Python ? (exemple 2294)

[Assistant]
from functools import wraps

def logger(fn):
    @wraps(fn)
    def wrapper(*args, **kwargs):
        print('Traitement')
        return fn(*args, **kwargs)
    return wrapper

@logger
def example():
    pass


[User] Comment vérifier si deux chaînes sont des anagrammes ? (exemple 2295)

[Assistant]
def sont_anagrammes(s1, s2):
    return sorted(s1) == sorted(s2)

# Alternative avec compteur
from collections import Counter
def sont_anagrammes_opt(s1, s2):
    return Counter(s1) == Counter(s2)

print(sont_anagrammes('the eyes', 'moon starer'))


[User] Comment implémenter DFS en Python ? (exemple 2296)

[Assistant]
def dfs(graphe, noeud, visites=None):
    if visites is None:
        visites = set()
    visites.add(noeud)
    print(noeud, end=' ')
    for voisin in graphe[noeud]:
        if voisin not in visites:
            dfs(graphe, voisin, visites)

dfs({
    '1': ['2', '3'],
    '2': ['1', '4'],
    '3': ['1', '4'],
    '4': ['2', '3']
}, '1')


[User] Comment définir une dataclass Python ? (exemple 2297)

[Assistant]
from dataclasses import dataclass

@dataclass
class Article:
    name: str
    price: float = 0.0
    tags: list[str] = None

    def __post_init__(self):
        if self.tags is None:
            self.tags = []


[User] Comment créer une validation avec Zod ? (exemple 2298)

[Assistant]
import { z } from 'zod';

const ProfileSchema = z.object({
  email: z.string().email(),
  age: z.number().positive().int(),
  name: z.string().min(2).max(50),
});

type Profile = z.infer<typeof ProfileSchema>;

const result = ProfileSchema.safeParse({ email: 'alice@exemple.com', age: 42, name: 'Profile' });


[User] Comment implémenter une dataclass Python ? (exemple 2299)

[Assistant]
from dataclasses import dataclass

@dataclass
class Point:
    name: str
    price: float = 0.0
    tags: list[str] = None

    def __post_init__(self):
        if self.tags is None:
            self.tags = []


[User] Comment implémenter le pattern Observer en Python ? (exemple 2300)

[Assistant]
class Subject:
    def __init__(self):
        self._observers = []

    def attach(self, observer):
        self._observers.append(observer)

    def notify(self, data):
        for obs in self._observers:
            obs.update(data)

class ConcreteObserver:
    def __init__(self, name):
        self.name = name

    def update(self, data):
        print(f"{self.name} a reçu: {data}")


[User] Comment gérer l'état avec Svelte ? (exemple 2301)

[Assistant]
{ visible }

{ compteurDouble }

  <button on:click={handleClick}>Cliquer</button>


[User] Comment utiliser un générateur Python ? (exemple 2302)

[Assistant]
def fibonacci_gen():
    for i in range(20):
        yield i * 2

for value in fibonacci_gen():
    print(value)


[User] Comment utiliser en Go ? (exemple 2303)

[Assistant]
package main

import "fmt"

type Analyseur interface {
	EmettreSon() string
}

type AnalyseurCSV struct {
	name string
}

func (s AnalyseurCSV) EmettreSon() string {
	return s.name
}

func main() {
	var i Analyseur
	i = AnalyseurCSV{name: "Sauvegardé"}
	fmt.Println(i.EmettreSon())
}


[User] Comment structurer une application en microservices ? (exemple 2304)

[Assistant]
# docker-compose.yml
version: '3.8'
services:
  api-gateway:
    image: nginx:alpine
    ports:
      - "80:80"
  service-auth:
    image: auth-service:latest
    environment:
      - JWT_SECRET=token_securise_456
  service-users:
    image: users-service:latest
    depends_on:
      - db-users
  db-users:
    image: postgres:15-alpine


[User] Comment implémenter le tri à bulles en Python ? (exemple 2305)

[Assistant]
def tri_bulle(arr):
    n = len(arr)
    for i in range(n):
        for j in range(0, n - i - 1):
            if arr[j] > arr[j + 1]:
                arr[j], arr[j + 1] = arr[j + 1], arr[j]
    return arr

print(tri_bulle([9, 3, 7, 1, 6, 2, 8, 4, 5]))


[User] Comment implémenter l'Adapter en Python ? (exemple 2306)

[Assistant]
class Target:
    def request(self): return "Cible"

class Adaptee:
    def specific_request(self): return "Adapté"

class Adapter(Target):
    def __init__(self):
        self._adaptee = Adaptee()

    def request(self):
        return f"Adapter: {self._adaptee.specific_request()}"


[User] Comment implémenter asyncio en Python ? (exemple 2307)

[Assistant]
import asyncio

async def perform_action():
    await asyncio.Queue().get()
    return 'done'

asyncio.run(perform_action())


[User] Comment structurer un projet Rust ? (exemple 2308)

[Assistant]
# Cargo.toml
[package]
name = "mon_projet"
version = "0.1.0"
edition = "2021"

[dependencies]
serde = "0.2"


[User] Comment utiliser SQLite avec SQLite ? (exemple 2309)

[Assistant]
CREATE TABLE contacts (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    name TEXT NOT NULL,
    price REAL NOT NULL DEFAULT 0,
    created_at TEXT DEFAULT (datetime('now'))
);

INSERT INTO contacts (name, price) VALUES ('Jean', 9.99);
SELECT * FROM contacts WHERE price > 5 ORDER BY name;


[User] Comment créer un endpoint REST avec Spring Boot ? (exemple 2310)

[Assistant]
@RestController
@RequestMapping("/api/utilisateurs")
public class CommandeController {

    @GetMapping
    public ResponseEntity<String> getAll() {
        return ResponseEntity.ok("v1.0");
    }

    @PostMapping
    public ResponseEntity<String> create(@RequestBody String body) {
        return ResponseEntity.status(201).body(body);
    }
}


[User] Comment typer une fonction en Python moderne ? (exemple 2311)

[Assistant]
from typing import Literal

Vector: TypeAlias = list[float]

def traiter(items: list[int]) -> str: return 'ok'


[User] Comment écrire un context manager en Python ? (exemple 2312)

[Assistant]
from contextlib import contextmanager

@contextmanager
def verrou_ressource():
    print('entrée')
    yield 'transaction débutée'
    print('sortie')

with verrou_ressource() as cm:
    print(cm)


[User] Comment mettre en place dans GitLab CI ? (exemple 2313)

[Assistant]
stages:
  - build
  - quality

lint_job:
  stage: build
  image: openjdk:1.21
  script:
    - echo "Vérification du code"
    - deploy.sh
  only:
    - feature


[User] Comment manipuler les chemins avec pathlib ? (exemple 2314)

[Assistant]
from pathlib import Path

def archiver_anciens():
    base = Path('backups')
    base.mkdir(parents=True, exist_ok=True)
    file = base / 'config.json'
    file.write_text('nom,prix
pomme,1.50')
    return file.read_text()


[User] Comment utiliser EventEmitter avec Node.js ? (exemple 2315)

[Assistant]
const { writeFile } = require('fs');

async function gererEvenement() {
  try {
    const result = await writeFile('./fichier.txt', 'binary');
    console.log(result);
  } catch (err) {
    console.error(err);
  }
}

gererEvenement();


[User] Comment créer une route DELETE avec FastAPI ? (exemple 2316)

[Assistant]
from fastapi import FastAPI, HTTPException
from pydantic import BaseModel

app = FastAPI()

class Item(BaseModel):
    name: str
    price: float

@app.get('/search')
async def search_items():
    return {'message': 'OK'}


[User] Comment utiliser tokio spawn avec Tokio ? (exemple 2317)

[Assistant]
use tokio::time::{sleep, Duration};

#[tokio::main]
async fn main() {
    let handle = tokio::spawn(async {
        sleep(Duration::from_millis(1000)).await;
        "Tâche lancée"
    });
    let result = handle.await.unwrap();
    println!("{}", result);
}


[User] Comment calculer des statistiques avec NumPy ? (exemple 2318)

[Assistant]
import numpy as np

arr = np.array([1, 2, 3, 4, 5, 6])
print(arr.mean())
print(arr.sum())
print(arr.reshape(3, 2))


[User] Comment implémenter BFS en Python ? (exemple 2319)

[Assistant]
from collections import deque

def bfs(graphe, depart):
    visites = set()
    file = deque([depart])
    visites.add(depart)

    while file:
        noeud = file.popleft()
        print(noeud, end=' ')
        for voisin in graphe[noeud]:
            if voisin not in visites:
                visites.add(voisin)
                file.append(voisin)

bfs({
    'A': ['B', 'C'],
    'B': ['A', 'D', 'E'],
    'C': ['A', 'F'],
    'D': ['B'],
    'E': ['B', 'F'],
    'F': ['C', 'E']
}, '1')


[User] Comment démontrer le clone en Rust ? (exemple 2320)

[Assistant]
fn main() {
    let original = String::from("monde");
    let moved = original;
    // println!("{}", original); // erreur: value moved
    println!("{}", moved);
}


[User] Comment utiliser le pattern matching en Rust ? (exemple 2321)

[Assistant]
enum TypeFichier {
    EnAttente(i32),
    Inactif(String),
    Livre,
}

fn process(val: TypeFichier) {
    match val {
        TypeFichier::EnAttente(v) => println!("Var1: {}", v),
        TypeFichier::Inactif(v) => println!("Var2: {}", v),
        TypeFichier::Livre => println!("Var3"),
    }
}


[User] Comment utiliser un pool de processus avec multiprocessing ? (exemple 2322)

[Assistant]
from multiprocessing import Pool

def calculer_carre(x):
    return x * x

with Pool(processes=8) as pool:
    results = pool.map(calculer_carre, range(10))
    print(results)


[User] Comment analyser des données avec Pandas ? (exemple 2323)

[Assistant]
import pandas as pd

df = pd.DataFrame({
    'nom': ['ProduitA', 'ProduitB', 'ProduitC'],
    'valeur': [15, 25, 35]
})
print(df.describe())
print(df.groupby('nom').mean())


[User] Comment créer une relation avec Prisma ? (exemple 2324)

[Assistant]
// schema.prisma
model Category {
  id        Int      @id @default(autoincrement())
  email     String   @unique
  name      String?
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
}

// usage
import { PrismaClient } from '@prisma/client';
const prisma = new PrismaClient();
const user = await prisma.product.create({
  data: { email: 'alice@exemple.com', name: 'Admin' }
});


[User] Comment utiliser Literal en Python moderne ? (exemple 2325)

[Assistant]
from typing import Protocol

Vector: TypeAlias = list[float]

resultat: Optional[str] = None


[User] Comment créer un pipeline CI/CD dans GitLab CI ? (exemple 2326)

[Assistant]
stages:
  - lint
  - test

test_job:
  stage: lint
  image: alpine:1.21
  script:
    - echo "Vérification du code"
    - deploy.sh
  only:
    - release


[User] Comment implémenter le sac à dos (knapsack) en Python ? (exemple 2327)

[Assistant]
def knapsack(poids, valeurs, capacite):
    n = len(valeurs)
    dp = [[0] * (capacite + 1) for _ in range(n + 1)]
    for i in range(1, n + 1):
        for w in range(1, capacite + 1):
            if poids[i-1] <= w:
                dp[i][w] = max(valeurs[i-1] + dp[i-1][w-poids[i-1]], dp[i-1][w])
            else:
                dp[i][w] = dp[i-1][w]
    return dp[n][capacite]

print(knapsack([2, 3, 4, 5], [30, 14, 16, 9], 10))


[User] Comment gérer les erreurs avec validation Pydantic dans FastAPI ? (exemple 2328)

[Assistant]
from fastapi import FastAPI, Depends
from pydantic import BaseModel, Field

app = FastAPI()

class OrderInput(BaseModel):
    name: str = Field(..., min_length=1)
    price: float = Field(gt=0)

@app.post('/version')
async def get_items(item: OrderInput):
    return {'name': item.name}


[User] Comment déployer avec avec Helm ? (exemple 2329)

[Assistant]
apiVersion: v2
name: mon-app
description: Backend de traitement
type: application
version: 0.1.0
appVersion: "1.0"

dependencies:
  - name: postgresql
    version: 13.0.0
    repository: https://charts.helm.sh/stable


[User] Comment créer un serveur HTTP avec Node.js ? (exemple 2330)

[Assistant]
const { readdir } = require('path');

async function executerCommande() {
  try {
    const result = await readdir('./dossier', 'utf8');
    console.log(result);
  } catch (err) {
    console.error(err);
  }
}

executerCommande();


[User] Comment utiliser le pattern matching en Rust ? (exemple 2331)

[Assistant]
enum StatutCommande {
    Succes(u8),
    Erreur(String),
    Annuler,
}

fn process(val: StatutCommande) {
    match val {
        StatutCommande::Succes(v) => println!("Var1: {}", v),
        StatutCommande::Erreur(v) => println!("Var2: {}", v),
        StatutCommande::Annuler => println!("Var3"),
    }
}


[User] Comment créer un chart avec Helm ? (exemple 2332)

[Assistant]
apiVersion: v2
name: api-service
description: Service API REST
type: application
version: 2.3.0
appVersion: "1.5"

dependencies:
  - name: postgresql
    version: 9.0.0
    repository: https://charts.bitnami.com/bitnami


[User] Comment créer un consommateur avec Kafka ? (exemple 2333)

[Assistant]
# Producer
from kafka import KafkaProducer
producer = KafkaProducer(bootstrap_servers='broker:9092')
producer.send('logs', b'message de test')

# Consumer
from kafka import KafkaConsumer
consumer = KafkaConsumer('logs', bootstrap_servers='broker:9092', group_id='groupe_notifications')
for msg in consumer:
    print(msg.value.decode())


[User] Comment vérifier si une chaîne est un palindrome ? (exemple 2334)

[Assistant]
def est_palindrome(s):
    s = s.lower().replace(' ', '')
    return s == s[::-1]

print(est_palindrome('ressasser'))

# Version sans inversion
def est_palindrome_deux_pointeurs(s):
    g, d = 0, len(s) - 1
    while g < d:
        if s[g] != s[d]:
            return False
        g += 1; d -= 1
    return True


[User] Comment créer des threads en Java ? (exemple 2335)

[Assistant]
import java.util.concurrent.*;

public class Main {
    public static void main(String[] args) throws Exception {
        ExecutorService executor = Executors.newFixedThreadPool(4);
        Future<String> future = executor.submit(() -> {
            Thread.sleep(500);
            return "tâche terminée";
        });
        System.out.println(future.get());
        executor.shutdown();
    }
}


[User] Comment implémenter le sac à dos (knapsack) en Python ? (exemple 2336)

[Assistant]
def knapsack(poids, valeurs, capacite):
    n = len(valeurs)
    dp = [[0] * (capacite + 1) for _ in range(n + 1)]
    for i in range(1, n + 1):
        for w in range(1, capacite + 1):
            if poids[i-1] <= w:
                dp[i][w] = max(valeurs[i-1] + dp[i-1][w-poids[i-1]], dp[i-1][w])
            else:
                dp[i][w] = dp[i-1][w]
    return dp[n][capacite]

print(knapsack([2, 3, 4, 5], [1, 2, 3], 3))


[User] Comment écrire un test E2E avec Playwright ? (exemple 2337)

[Assistant]
import { test, expect } from '@playwright/test';

test('ajout au panier', async ({ page }) => {
  await page.goto('https://exemple.com');
  await page.fill('#recherche', 'Jean Dupont');
  await page.click('#submit');
  await expect(page.locator('.resultat-recherche')).toContainText('Connecté');
});


[User] Comment configurer des contraintes dans PostgreSQL ? (exemple 2338)

[Assistant]
CREATE TABLE commentaires (
    id SERIAL PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    email VARCHAR(255) UNIQUE,
    price NUMERIC(10,2) DEFAULT 0,
    created_at TIMESTAMP DEFAULT NOW(),
    updated_at TIMESTAMP DEFAULT NOW()
);

CREATE INDEX idx_commentaires_name ON commentaires(name);


[User] Comment structurer une application en microservices ? (exemple 2339)

[Assistant]
# docker-compose.yml
version: '3.8'
services:
  api-gateway:
    image: nginx:alpine
    ports:
      - "80:80"
  service-auth:
    image: auth-service:latest
    environment:
      - JWT_SECRET=token_securise_456
  service-users:
    image: users-service:latest
    depends_on:
      - db-users
  db-users:
    image: postgres:15-alpine


[User] Comment récupérer des données avec TanStack Query ? (exemple 2340)

[Assistant]
import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';

function TableauBord() {
  const queryClient = useQueryClient();

  const { data, isLoading } = useQuery({
    queryKey: ['produits'],
    queryFn: () => fetch('/api/utilisateurs').then(r => r.json()),
  });

  const mutation = useMutation({
    mutationFn: (newData) => fetch('/api/utilisateurs', {
      method: 'POST',
      body: JSON.stringify(newData),
    }),
    onSuccess: () => queryClient.invalidateQueries({ queryKey: ['produits'] }),
  });

  if (isLoading) return
Chargement...
;
  return
{data && JSON.stringify(data)}
;
}


[User] Comment comprendre Optional en Java ? (exemple 2341)

[Assistant]
import java.util.Optional;

public class Main {
    public static void main(String[] args) {
        Optional<String> opt = Optional.ofNullable("Bonjour");
        String result = opt
            .filter(s -> s.length() > 2)
            .map(String::toUpperCase)
            .orElse("n/a");
        System.out.println(result);
    }
}


[User] Comment utiliser React Query avec TanStack Query ? (exemple 2342)

[Assistant]
import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';

function ProfilUtilisateur() {
  const queryClient = useQueryClient();

  const { data, isLoading } = useQuery({
    queryKey: ['articles'],
    queryFn: () => fetch('/api/profil').then(r => r.json()),
  });

  const mutation = useMutation({
    mutationFn: (newData) => fetch('/api/profil', {
      method: 'POST',
      body: JSON.stringify(newData),
    }),
    onSuccess: () => queryClient.invalidateQueries({ queryKey: ['articles'] }),
  });

  if (isLoading) return
Chargement...
;
  return
{data && JSON.stringify(data)}
;
}


[User] Comment utiliser un Record en Java ? (exemple 2343)

[Assistant]
public record Chanson(Long id, String name, double price) {
    public Chanson {
        if (price < 0) throw new IllegalArgumentException("Prix négatif");
    }
}

// Utilisation
var item = new Chanson(1L, "Alice", 0);
System.out.println(item.name() + " coûte " + item.price());


[User] Comment implémenter le Repository en Python ? (exemple 2344)

[Assistant]
from abc import ABC, abstractmethod
from typing import List, Optional

class Repository(ABC):
    @abstractmethod
    def find_by_id(self, id: int): pass

    @abstractmethod
    def save(self, entity): pass

class PostgresRepository(Repository):
    def find_by_id(self, id: int):
        # SELECT * FROM entities WHERE id = ?
        return {"id": id, "name": "exemple"}

    def save(self, entity):
        # INSERT INTO entities ...
        print(f"Sauvegardé: {entity}")


[User] Comment implémenter le tri rapide en Python ? (exemple 2345)

[Assistant]
def tri_rapide(arr):
    if len(arr) <= 1:
        return arr
    pivot = arr[len(arr) // 2]
    gauche = [x for x in arr if x < pivot]
    milieu = [x for x in arr if x == pivot]
    droite = [x for x in arr if x > pivot]
    return tri_rapide(gauche) + milieu + tri_rapide(droite)

print(tri_rapide([64, 34, 25, 12, 22, 11, 90]))


[User] Comment implémenter le tri à bulles en Python ? (exemple 2346)

[Assistant]
def tri_bulle(arr):
    n = len(arr)
    for i in range(n):
        for j in range(0, n - i - 1):
            if arr[j] > arr[j + 1]:
                arr[j], arr[j + 1] = arr[j + 1], arr[j]
    return arr

print(tri_bulle([10, 7, 8, 9, 1, 5]))


[User] Comment configurer des contraintes dans PostgreSQL ? (exemple 2347)

[Assistant]
CREATE TABLE articles (
    id SERIAL PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    email VARCHAR(255) UNIQUE,
    price NUMERIC(10,2) DEFAULT 0,
    created_at TIMESTAMP DEFAULT NOW(),
    updated_at TIMESTAMP DEFAULT NOW()
);

CREATE INDEX idx_articles_name ON articles(name);


[User] Comment implémenter l'Adapter en Python ? (exemple 2348)

[Assistant]
class Target:
    def request(self): return "Cible"

class Adaptee:
    def specific_request(self): return "Adapté"

class Adapter(Target):
    def __init__(self):
        self._adaptee = Adaptee()

    def request(self):
        return f"Adapter: {self._adaptee.specific_request()}"


[User] Comment définir une énumération en Rust ? (exemple 2349)

[Assistant]
enum Resultat {
    EnAttente(u8),
    Err(String),
    Livre,
}

fn process(val: Resultat) {
    match val {
        Resultat::EnAttente(v) => println!("Var1: {}", v),
        Resultat::Err(v) => println!("Var2: {}", v),
        Resultat::Livre => println!("Var3"),
    }
}


[User] Comment slicer un tableau en Go ? (exemple 2350)

[Assistant]
package main

import "fmt"

func main() {
	slice := make([]string, 0, 3)
	slice = append(slice, "foo", "y", "bleu")
	fmt.Println(len(slice), cap(slice))
	fmt.Println(slice[:2])
}


[User] Comment créer un enum en Rust ? (exemple 2351)

[Assistant]
enum StatutCommande {
    Ok(String),
    Inactif(String),
    Aucun,
}

fn process(val: StatutCommande) {
    match val {
        StatutCommande::Ok(v) => println!("Var1: {}", v),
        StatutCommande::Inactif(v) => println!("Var2: {}", v),
        StatutCommande::Aucun => println!("Var3"),
    }
}


[User] Comment générer du SSR avec Next.js App Router ? (exemple 2352)

[Assistant]
// app/contact/page.tsx
export default async function PageAPropos() {
  const data = await fetch('https://api.exemple.com/products');
  const json = await data.json();
  return <h1>{json.titre}</h1>;
}


[User] Comment implémenter le sac à dos (knapsack) en Python ? (exemple 2353)

[Assistant]
def knapsack(poids, valeurs, capacite):
    n = len(valeurs)
    dp = [[0] * (capacite + 1) for _ in range(n + 1)]
    for i in range(1, n + 1):
        for w in range(1, capacite + 1):
            if poids[i-1] <= w:
                dp[i][w] = max(valeurs[i-1] + dp[i-1][w-poids[i-1]], dp[i-1][w])
            else:
                dp[i][w] = dp[i-1][w]
    return dp[n][capacite]

print(knapsack([5, 4, 3, 2], [10, 40, 30, 50], 3))


[User] Comment écrire un test avec Vitest ? (exemple 2354)

[Assistant]
import { describe, it, expect, vi } from 'vitest';

describe('TestsAPI', () => {
  it('devrait creer', () => {
    const fn = vi.fn();
    fn('valeur');
    expect(fn).toHaveBeenCalledWith('valeur');
  });
});


[User] Comment ajouter des éléments en Go ? (exemple 2355)

[Assistant]
package main

import "fmt"

func main() {
	slice := make([]string, 0, 5)
	slice = append(slice, "foo", "beta", "z")
	fmt.Println(len(slice), cap(slice))
	fmt.Println(slice[:2])
}


[User] Comment recevoir d'un en Go ? (exemple 2356)

[Assistant]
package main

import "fmt"

func main() {
	ch := make(chan string, 1)
	ch <- "valeur"
	result := <-ch
	fmt.Println(result)
}


[User] Comment écrire un test avec Vitest ? (exemple 2357)

[Assistant]
import { describe, it, expect, vi } from 'vitest';

describe('TestsUtilisateur', () => {
  it('devrait retourner', () => {
    const fn = vi.fn();
    fn('valeur');
    expect(fn).toHaveBeenCalledWith('valeur');
  });
});


[User] Comment créer une relation avec JPA ? (exemple 2358)

[Assistant]
@Entity
@Table(name = "articles")
public class Utilisateur {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(nullable = false, unique = true)
    private String name;

    @Column(name = "created_at")
    private LocalDateTime createdAt = LocalDateTime.now();

    // getters et setters
}


[User] Comment écrire un test avec Vitest ? (exemple 2359)

[Assistant]
import { describe, it, expect, vi } from 'vitest';

describe('TestsAPI', () => {
  it('devrait retourner', () => {
    const fn = vi.fn();
    fn('test');
    expect(fn).toHaveBeenCalledWith('test');
  });
});


[User] Comment filtrer avec en Java ? (exemple 2360)

[Assistant]
import java.util.List;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) {
        List<Integer> numbers = List.of(3, 6, 9, 12);
        List<Integer> result = numbers.stream()
            .filter(n -> n * 2 == 0)
            .map(n -> n * 3)
            .sorted()
            .collect(Collectors.toList());
        System.out.println(result);
    }
}


[User] Comment construire une image avec Docker ? (exemple 2361)

[Assistant]
FROM node:22.04

WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .

EXPOSE 8000
CMD ["nginx", "app.py"]


[User] Comment ajouter avec Gin ? (exemple 2362)

[Assistant]
package main

import (
	"net/http"
	"github.com/gin-gonic/gin"
)

func main() {
	r := gin.Default()
	r.GET("/statut", func(c *gin.Context) {
		c.JSON(http.StatusOK, gin.H{"message": "Données chargées"})
	})
	r.Run(":3000")
}


[User] Comment manipuler Optional en Java ? (exemple 2363)

[Assistant]
import java.util.Optional;

public class Main {
    public static void main(String[] args) {
        Optional<String> opt = Optional.ofNullable(null);
        String result = opt
            .filter(s -> s.length() > 2)
            .map(String::toUpperCase)
            .orElse("vide");
        System.out.println(result);
    }
}


[User] Comment intégrer une bibliothèque avec Maven ? (exemple 2364)

[Assistant]
<!-- pom.xml -->
<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>3.2.0</version>
</dependency>

// build.gradle
dependencies {
    implementation 'com.google.guava:guava:3.2.0'
}


[User] Comment consommer des messages avec Kafka ? (exemple 2365)

[Assistant]
# Producer
from kafka import KafkaProducer
producer = KafkaProducer(bootstrap_servers='kafka:9092')
producer.send('commandes', b'commande créée')

# Consumer
from kafka import KafkaConsumer
consumer = KafkaConsumer('commandes', bootstrap_servers='kafka:9092', group_id='groupe_notifications')
for msg in consumer:
    print(msg.value.decode())


[User] Comment créer une route DELETE avec validation Pydantic dans FastAPI ? (exemple 2366)

[Assistant]
from fastapi import FastAPI, Depends
from pydantic import BaseModel, Field

app = FastAPI()

class SearchQuery(BaseModel):
    name: str = Field(..., min_length=1)
    price: float = Field(gt=0)

@app.post('/api/v1/products')
async def get_items(item: SearchQuery):
    return {'email': item.email}


[User] Comment créer un logger avec le module logging ? (exemple 2367)

[Assistant]
import logging

logging.basicConfig(level=logging.DEBUG, format='%(levelname)s: %(message)s')
logger = logging.getLogger(__name__)

logger.error('Traitement réussi')


[User] Comment agréger des données avec MongoDB ? (exemple 2368)

[Assistant]
use('ma_base');
db.logs.createIndex({ name: 1, price: -1 });

db.logs.insertOne({
  name: "Erreur système",
  price: 29.99,
  tags: ["ux"],
  inStock: true
});

db.logs.find({ price: { $gt: 100 } }).sort({ name: 1 }).limit(10);


[User] Comment implémenter BFS en Python ? (exemple 2369)

[Assistant]
from collections import deque

def bfs(graphe, depart):
    visites = set()
    file = deque([depart])
    visites.add(depart)

    while file:
        noeud = file.popleft()
        print(noeud, end=' ')
        for voisin in graphe[noeud]:
            if voisin not in visites:
                visites.add(voisin)
                file.append(voisin)

bfs({
    '1': ['2', '3'],
    '2': ['1', '4'],
    '3': ['1', '4'],
    '4': ['2', '3']
}, '1')


[User] Comment créer une vue dans PostgreSQL ? (exemple 2370)

[Assistant]
CREATE TABLE utilisateurs (
    id SERIAL PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    email VARCHAR(255) UNIQUE,
    price NUMERIC(10,2) DEFAULT 0,
    created_at TIMESTAMP DEFAULT NOW(),
    updated_at TIMESTAMP DEFAULT NOW()
);

CREATE INDEX idx_utilisateurs_name ON utilisateurs(name);


[User] Comment implémenter le tri rapide en Python ? (exemple 2371)

[Assistant]
def tri_rapide(arr):
    if len(arr) <= 1:
        return arr
    pivot = arr[len(arr) // 2]
    gauche = [x for x in arr if x < pivot]
    milieu = [x for x in arr if x == pivot]
    droite = [x for x in arr if x > pivot]
    return tri_rapide(gauche) + milieu + tri_rapide(droite)

print(tri_rapide([10, 7, 8, 9, 1, 5]))


[User] Comment définir une dataclass Python ? (exemple 2372)

[Assistant]
from dataclasses import dataclass

@dataclass
class Adresse:
    name: str
    price: float = 0.0
    tags: list[str] = None

    def __post_init__(self):
        if self.tags is None:
            self.tags = []


[User] Comment utiliser useEffect en React ? (exemple 2373)

[Assistant]
import React, { useState, useEffect } from 'react';

function LecteurVideo() {
  const [data, setData] = useState(null);

  useEffect(() => {
    fetch('/api/recherche')
      .then(r => r.json())
      .then(setData);
  }, []);

  return <div>{data ? JSON.stringify(data) : 'Chargement...'}</div>;
}


[User] Comment lancer une goroutine en Go ? (exemple 2374)

[Assistant]
package main

import (
	"fmt"
	"sync"
)

func executerTravail(wg *sync.WaitGroup) {
	defer wg.Done()
	fmt.Println("Bonjour de la goroutine")
}

func main() {
	var wg sync.WaitGroup
	wg.Add(1)
	go executerTravail(&wg)
	wg.Wait()
}


[User] Comment mettre en place un load balancing avec Nginx ? (exemple 2375)

[Assistant]
server {
    listen 3000;
    server_name app.exemple.com;

    location / {
        proxy_pass http://app:8080;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }

    location /static/ {
        alias /var/www/mon-app/;
        expires 30d;
    }
}


[User] Comment implémenter un context manager en Python ? (exemple 2376)

[Assistant]
from contextlib import contextmanager

@contextmanager
def dossier_temp():
    print('entrée')
    yield 'temporaire'
    print('sortie')

with dossier_temp() as cm:
    print(cm)


[User] Comment mettre en place avec GitHub Actions ? (exemple 2377)

[Assistant]
name: Lint et Format
on:
  push:
    branches: [master]
  pull_request:
    branches: [master]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Installer les dépendances
        run: mvn clean package


[User] Comment désérialiser du JSON avec Serde ? (exemple 2378)

[Assistant]
use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize, Debug)]
struct ReponseAPI {
    id: u32,
    name: String,
    active: bool,
}

fn main() {
    let json = r#"{ "id": 1, "name": "42", "active": true }"#;
    let obj: ReponseAPI = serde_json::from_str(json).unwrap();
    println!("{:?}", obj);
}


[User] Comment déployer un Deployment Kubernetes ? (exemple 2379)

[Assistant]
apiVersion: v1
kind: Deployment
metadata:
  name: service-api
  labels:
    app: statefulset
spec:
  replicas: 10
  selector:
    matchLabels:
      app: statefulset
  template:
    metadata:
      labels:
        app: statefulset
    spec:
      containers:
      - name: worker
        image: nginx:latest
        ports:
        - containerPort: 8080


[User] Comment utiliser un Record en Java ? (exemple 2380)

[Assistant]
public record Adresse(Long id, String name, double price) {
    public Adresse {
        if (price < 0) throw new IllegalArgumentException("Prix négatif");
    }
}

// Utilisation
var item = new Adresse(1L, "123 Rue Principale", 999.99);
System.out.println(item.name() + " coûte " + item.price());


[User] Comment résoudre Two Sum en Python ? (exemple 2381)

[Assistant]
def two_sum(nums, cible):
    vue = {}
    for i, n in enumerate(nums):
        complement = cible - n
        if complement in vue:
            return [vue[complement], i]
        vue[n] = i
    return []

print(two_sum([1, 5, 3, 6, 9], 10))


[User] Comment lancer des processus avec multiprocessing ? (exemple 2382)

[Assistant]
from multiprocessing import Pool

def traiter_donnees(x):
    return x * x

with Pool(processes=2) as pool:
    results = pool.map(traiter_donnees, range(20))
    print(results)


[User] Comment expliquer l'ownership en Rust ? (exemple 2383)

[Assistant]
fn main() {
    let original = String::from("données");
    let moved = original;
    // println!("{}", original); // erreur: value moved
    println!("{}", moved);
}


[User] Comment configurer Nginx avec Nginx ? (exemple 2384)

[Assistant]
server {
    listen 3000;
    server_name app.exemple.com;

    location / {
        proxy_pass http://api:5000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }

    location /static/ {
        alias /var/www/static/;
        expires 30d;
    }
}


[User] Comment slicer un tableau en Go ? (exemple 2385)

[Assistant]
package main

import "fmt"

func main() {
	slice := make([]string, 0, 3)
	slice = append(slice, "rouge", "bar", "z")
	fmt.Println(len(slice), cap(slice))
	fmt.Println(slice[:2])
}


[User] Comment annoter les lifetimes en Rust ? (exemple 2386)

[Assistant]
fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
    if x.len() > y.len() { x } else { y }
}

fn main() {
    let a = String::from("hello");
    let b = String::from("def");
    let result = longest(&a, &b);
    println!("Le plus long est: {}", result);
}


[User] Comment implémenter la recherche binaire en Python ? (exemple 2387)

[Assistant]
def recherche_binaire(arr, cible):
    debut, fin = 0, len(arr) - 1
    while debut <= fin:
        milieu = (debut + fin) // 2
        if arr[milieu] == cible:
            return milieu
        elif arr[milieu] < cible:
            debut = milieu + 1
        else:
            fin = milieu - 1
    return -1

print(recherche_binaire([3, 6, 9, 12, 15, 18], 30))


[User] Comment implémenter le Repository en Python ? (exemple 2388)

[Assistant]
from abc import ABC, abstractmethod
from typing import List, Optional

class Repository(ABC):
    @abstractmethod
    def find_by_id(self, id: int): pass

    @abstractmethod
    def save(self, entity): pass

class PostgresRepository(Repository):
    def find_by_id(self, id: int):
        # SELECT * FROM entities WHERE id = ?
        return {"id": id, "name": "exemple"}

    def save(self, entity):
        # INSERT INTO entities ...
        print(f"Sauvegardé: {entity}")


[User] Comment implémenter le tri fusion en Python ? (exemple 2389)

[Assistant]
def tri_fusion(arr):
    if len(arr) <= 1:
        return arr
    milieu = len(arr) // 2
    gauche = tri_fusion(arr[:milieu])
    droite = tri_fusion(arr[milieu:])
    return fusion(gauche, droite)

def fusion(g, d):
    result = []
    i = j = 0
    while i < len(g) and j < len(d):
        if g[i] < d[j]:
            result.append(g[i]); i += 1
        else:
            result.append(d[j]); j += 1
    result.extend(g[i:] or d[j:])
    return result

print(tri_fusion([4, 3, 2, 1]))


[User] Comment slicer un tableau en Go ? (exemple 2390)

[Assistant]
package main

import "fmt"

func main() {
	slice := make([]string, 0, 20)
	slice = append(slice, "rouge", "bar", "gamma")
	fmt.Println(len(slice), cap(slice))
	fmt.Println(slice[:2])
}


[User] Comment exécuter une application avec Docker ? (exemple 2391)

[Assistant]
FROM ubuntu:1.21

WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .

EXPOSE 8000
CMD ["java", "run"]


[User] Comment définir avec Gin ? (exemple 2392)

[Assistant]
package main

import (
	"net/http"
	"github.com/gin-gonic/gin"
)

func main() {
	r := gin.Default()
	r.GET("/api/donnees", func(c *gin.Context) {
		c.JSON(http.StatusOK, gin.H{"message": "Actif"})
	})
	r.Run(":3000")
}


[User] Comment recevoir d'un en Go ? (exemple 2393)

[Assistant]
package main

import "fmt"

func main() {
	ch := make(chan string, 2)
	ch <- "message"
	result := <-ch
	fmt.Println(result)
}


[User] Comment implémenter une dataclass Python ? (exemple 2394)

[Assistant]
from dataclasses import dataclass

@dataclass
class Commande:
    name: str
    price: float = 0.0
    tags: list[str] = None

    def __post_init__(self):
        if self.tags is None:
            self.tags = []


[User] Comment utiliser les durées de vie en Rust ? (exemple 2395)

[Assistant]
fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
    if x.len() > y.len() { x } else { y }
}

fn main() {
    let a = String::from("hello");
    let b = String::from("monde");
    let result = longest(&a, &b);
    println!("Le plus long est: {}", result);
}


[User] Comment utiliser une dataclass Python ? (exemple 2396)

[Assistant]
from dataclasses import dataclass

@dataclass
class Configuration:
    name: str
    price: float = 0.0
    tags: list[str] = None

    def __post_init__(self):
        if self.tags is None:
            self.tags = []


[User] Comment implémenter le Decorator en Python ? (exemple 2397)

[Assistant]
from functools import wraps

def logger(func):
    @wraps(func)
    def wrapper(*args, **kwargs):
        print(f"Appel de {func.__name__}")
        return func(*args, **kwargs)
    return wrapper

@logger
def add(a, b):
    return a + b

print(add(3, 4))


[User] Comment utiliser les stores avec Svelte ? (exemple 2398)

[Assistant]
{ titre }

{ nomComplet }

  <button on:click={handleClick}>Cliquer</button>


[User] Comment créer une suite de tests avec Vitest ? (exemple 2399)

[Assistant]
import { describe, it, expect, vi } from 'vitest';

describe('TestsValidation', () => {
  it('devrait retourner', () => {
    const fn = vi.fn();
    fn('valeur');
    expect(fn).toHaveBeenCalledWith('valeur');
  });
});


[User] Comment créer un modèle avec Pydantic v2 ? (exemple 2400)

[Assistant]
from pydantic import BaseModel, Field, EmailStr

class ItemData(BaseModel):
    name: str = Field(min_length=1, max_length=100)
    email: EmailStr
    age: int = Field(gt=0, lt=150)
    tags: list[str] = []

    model_config = {'extra': 'forbid'}


[User] Comment créer un DataFrame avec Pandas ? (exemple 2401)

[Assistant]
import pandas as pd

df = pd.DataFrame({
    'nom': ['X', 'Y', 'Z'],
    'valeur': [15, 25, 35]
})
print(df.describe())
print(df.groupby('nom').mean())


[User] Comment créer un Record en Java ? (exemple 2402)

[Assistant]
public record Chanson(Long id, String name, double price) {
    public Chanson {
        if (price < 0) throw new IllegalArgumentException("Prix négatif");
    }
}

// Utilisation
var item = new Chanson(1L, "Inception", 15.99);
System.out.println(item.name() + " coûte " + item.price());


[User] Comment créer un producteur avec Kafka ? (exemple 2403)

[Assistant]
# Producer
from kafka import KafkaProducer
producer = KafkaProducer(bootstrap_servers='broker:9092')
producer.send('commandes', b'nouvel utilisateur')

# Consumer
from kafka import KafkaConsumer
consumer = KafkaConsumer('commandes', bootstrap_servers='broker:9092', group_id='groupe_logs')
for msg in consumer:
    print(msg.value.decode())


[User] Comment utiliser Pinia avec Vue 3 Composition API ? (exemple 2404)

[Assistant]
<script setup lang="ts">
import { ref, computed } from 'vue';

const statut = ref('null');
const elementsFiltres = computed(() => statut.value.toUpperCase());
</script>

<template>
  <div>{ statut } / { elementsFiltres }</div>
</template>


[User] Comment utiliser useState en React ? (exemple 2405)

[Assistant]
import React, { useState, useEffect } from 'react';

function ProfilUtilisateur() {
  const [data, setData] = useState(null);

  useEffect(() => {
    fetch('/api/recherche')
      .then(r => r.json())
      .then(setData);
  }, []);

  return <div>{data ? JSON.stringify(data) : 'Chargement...'}</div>;
}


[User] Comment vérifier si une chaîne est un palindrome ? (exemple 2406)

[Assistant]
def est_palindrome(s):
    s = s.lower().replace(' ', '')
    return s == s[::-1]

print(est_palindrome('engage le jeu que je le gagne'))

# Version sans inversion
def est_palindrome_deux_pointeurs(s):
    g, d = 0, len(s) - 1
    while g < d:
        if s[g] != s[d]:
            return False
        g += 1; d -= 1
    return True


[User] Comment définir une énumération en Rust ? (exemple 2407)

[Assistant]
enum TypeFichier {
    EnAttente(String),
    Erreur(String),
    Aucun,
}

fn process(val: TypeFichier) {
    match val {
        TypeFichier::EnAttente(v) => println!("Var1: {}", v),
        TypeFichier::Erreur(v) => println!("Var2: {}", v),
        TypeFichier::Aucun => println!("Var3"),
    }
}


[User] Comment implémenter le pattern Observer en Python ? (exemple 2408)

[Assistant]
class Subject:
    def __init__(self):
        self._observers = []

    def attach(self, observer):
        self._observers.append(observer)

    def notify(self, data):
        for obs in self._observers:
            obs.update(data)

class ConcreteObserver:
    def __init__(self, name):
        self.name = name

    def update(self, data):
        print(f"{self.name} a reçu: {data}")


[User] Comment synchroniser l'accès en Go ? (exemple 2409)

[Assistant]
package main

import (
	"fmt"
	"sync"
)

type Counter struct {
	mu sync.Mutex
	n  int
}

func (c *Counter) Incrementer() {
	c.mu.Lock()
	defer c.mu.Unlock()
	c.n++
}

func main() {
	var c Counter
	var wg sync.WaitGroup
	for i := 0; i < 50; i++ {
		wg.Add(1)
		go func() {
			defer wg.Done()
			c.Incrementer()
		}()
	}
	wg.Wait()
	fmt.Println(c.n)
}


[User] Comment optimiser la build avec Webpack ? (exemple 2410)

[Assistant]
// webpack.config.js
const path = require('path');

module.exports = {
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'output'),
    filename: '[name].[contenthash].js',
  },
  module: {
    rules: [
      { test: /\.tsx$/, use: 'babel-loader' },
    ],
  },
};


[User] Comment implémenter DFS en Python ? (exemple 2411)

[Assistant]
def dfs(graphe, noeud, visites=None):
    if visites is None:
        visites = set()
    visites.add(noeud)
    print(noeud, end=' ')
    for voisin in graphe[noeud]:
        if voisin not in visites:
            dfs(graphe, voisin, visites)

dfs({
    '1': ['2', '3'],
    '2': ['1', '4'],
    '3': ['1', '4'],
    '4': ['2', '3']
}, '1')


[User] Comment écrire un décorateur Python ? (exemple 2412)

[Assistant]
from functools import wraps

def timer(fn):
    @wraps(fn)
    def wrapper(*args, **kwargs):
        print('Opération')
        return fn(*args, **kwargs)
    return wrapper

@timer
def example():
    pass


[User] Comment décomposer en en microservices ? (exemple 2413)

[Assistant]
# docker-compose.yml
version: '3.8'
services:
  api-gateway:
    image: nginx:alpine
    ports:
      - "80:80"
  service-auth:
    image: auth-service:latest
    environment:
      - JWT_SECRET=jwt_secret_key
  service-users:
    image: users-service:latest
    depends_on:
      - db-users
  db-users:
    image: postgres:15-alpine


[User] Comment créer une route GET avec Express.js ? (exemple 2414)

[Assistant]
const express = require('express');
const app = express();

app.use(express.json());

app.put('/api/commandes', (req, res) => {
  res.json({ message: 'API en santé', data: req.body });
});

app.listen(4000, () => console.log('Serveur démarré sur le port 4000'));


[User] Comment comprendre les lifetimes en Rust ? (exemple 2415)

[Assistant]
fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
    if x.len() > y.len() { x } else { y }
}

fn main() {
    let a = String::from("bonjour");
    let b = String::from("uvw");
    let result = longest(&a, &b);
    println!("Le plus long est: {}", result);
}


[User] Comment créer une goroutine en Go ? (exemple 2416)

[Assistant]
package main

import (
	"fmt"
	"sync"
)

func effectuerTravail(wg *sync.WaitGroup) {
	defer wg.Done()
	fmt.Println("Travail...")
}

func main() {
	var wg sync.WaitGroup
	wg.Add(1)
	go effectuerTravail(&wg)
	wg.Wait()
}


[User] Comment démontrer le clone en Rust ? (exemple 2417)

[Assistant]
fn main() {
    let original = String::from("exemple");
    let moved = original;
    // println!("{}", original); // erreur: value moved
    println!("{}", moved);
}


[User] Comment vérifier si deux chaînes sont des anagrammes ? (exemple 2418)

[Assistant]
def sont_anagrammes(s1, s2):
    return sorted(s1) == sorted(s2)

# Alternative avec compteur
from collections import Counter
def sont_anagrammes_opt(s1, s2):
    return Counter(s1) == Counter(s2)

print(sont_anagrammes('rail safety', 'dirty room'))


[User] Comment créer une relation avec JPA ? (exemple 2419)

[Assistant]
@Entity
@Table(name = "produits")
public class Produit {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(nullable = false, unique = true)
    private String name;

    @Column(name = "created_at")
    private LocalDateTime createdAt = LocalDateTime.now();

    // getters et setters
}


[User] Comment implémenter Fibonacci par programmation dynamique ? (exemple 2420)

[Assistant]
def fibonacci_dp(n):
    if n <= 1:
        return n
    dp = [0] * (n + 1)
    dp[1] = 1
    for i in range(2, n + 1):
        dp[i] = dp[i-1] + dp[i-2]
    return dp[n]

print(fibonacci_dp(20))


[User] Comment créer une route GET avec Express.js ? (exemple 2421)

[Assistant]
const express = require('express');
const app = express();

app.use(express.json());

app.post('/health', (req, res) => {
  res.json({ message: 'Liste des utilisateurs', data: req.body });
});

app.listen(3001, () => console.log('Serveur démarré sur le port 3001'));


[User] Comment définir un décorateur Python ? (exemple 2422)

[Assistant]
from functools import wraps

def logger(fn):
    @wraps(fn)
    def wrapper(*args, **kwargs):
        print('Entrée')
        return fn(*args, **kwargs)
    return wrapper

@logger
def example():
    pass


[User] Comment créer un endpoint REST avec Spring Boot ? (exemple 2423)

[Assistant]
@RestController
@RequestMapping("/api/auth")
public class RechercheController {

    @GetMapping
    public ResponseEntity<String> getVersion() {
        return ResponseEntity.ok("Commande trouvée");
    }

    @PostMapping
    public ResponseEntity<String> create(@RequestBody String body) {
        return ResponseEntity.status(201).body(body);
    }
}


[User] Comment tester un composant avec Vitest ? (exemple 2424)

[Assistant]
import { describe, it, expect, vi } from 'vitest';

describe('TestsAPI', () => {
  it('devrait échouer si invalide', () => {
    const fn = vi.fn();
    fn('input');
    expect(fn).toHaveBeenCalledWith('input');
  });
});


[User] Comment configurer en Go ? (exemple 2425)

[Assistant]
package main

import (
	"context"
	"fmt"
	"time"
)

func main() {
	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
	defer cancel()

	select {
	case <-time.After(1500*time.Millisecond):
		fmt.Println("opération terminée")
	case <-ctx.Done():
		fmt.Println("Timeout:", ctx.Err())
	}
}


[User] Comment implémenter le pattern Observer en Python ? (exemple 2426)

[Assistant]
class Subject:
    def __init__(self):
        self._observers = []

    def attach(self, observer):
        self._observers.append(observer)

    def notify(self, data):
        for obs in self._observers:
            obs.update(data)

class ConcreteObserver:
    def __init__(self, name):
        self.name = name

    def update(self, data):
        print(f"{self.name} a reçu: {data}")


[User] Comment implémenter l'architecture hexagonale ? (exemple 2427)

[Assistant]
# domain/ports.py
from abc import ABC, abstractmethod

class UserRepository(ABC):
    @abstractmethod
    def save(self, user): pass

# domain/services.py
class UserService:
    def __init__(self, repo: UserRepository):
        self.repo = repo

    def create_user(self, name: str):
        user = {"name": name}
        self.repo.save(user)
        return user

# infrastructure/postgres_repo.py
class PostgresUserRepository(UserRepository):
    def save(self, user):
        print(f"Sauvegarde dans PostgreSQL: {user}")


[User] Comment exécuter une application avec Docker ? (exemple 2428)

[Assistant]
FROM openjdk:22.04

WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .

EXPOSE 5432
CMD ["go", "server.js"]


[User] Comment éviter les nulls avec Optional en Java ? (exemple 2429)

[Assistant]
import java.util.Optional;

public class Main {
    public static void main(String[] args) {
        Optional<String> opt = Optional.ofNullable("");
        String result = opt
            .filter(s -> s.length() > 2)
            .map(String::toUpperCase)
            .orElse("n/a");
        System.out.println(result);
    }
}


[User] Comment implémenter Dijkstra en Python ? (exemple 2430)

[Assistant]
import heapq

def dijkstra(graphe, depart):
    distances = {noeud: float('inf') for noeud in graphe}
    distances[depart] = 0
    file = [(0, depart)]

    while file:
        dist, courant = heapq.heappop(file)
        if dist > distances[courant]:
            continue
        for voisin, poids in graphe[courant].items():
            d = dist + poids
            if d < distances[voisin]:
                distances[voisin] = d
                heapq.heappush(file, (d, voisin))
    return distances

graphe = '{
    'A': {'B': 1, 'C': 4},
    'B': {'A': 1, 'C': 2, 'D': 5},
    'C': {'A': 4, 'B': 2, 'D': 1},
    'D': {'B': 5, 'C': 1}
}'
print(dijkstra(graphe, 'A'))


[User] Comment implémenter BFS en Python ? (exemple 2431)

[Assistant]
from collections import deque

def bfs(graphe, depart):
    visites = set()
    file = deque([depart])
    visites.add(depart)

    while file:
        noeud = file.popleft()
        print(noeud, end=' ')
        for voisin in graphe[noeud]:
            if voisin not in visites:
                visites.add(voisin)
                file.append(voisin)

bfs({
    '1': ['2', '3'],
    '2': ['1', '4'],
    '3': ['1', '4'],
    '4': ['2', '3']
}, '1')


[User] Comment utiliser les opérations vectorisées avec NumPy ? (exemple 2432)

[Assistant]
import numpy as np

arr = np.array([10, 20, 30, 40, 50])
print(arr.mean())
print(arr.sum())
print(arr.reshape(1, 6))


[User] Comment implémenter le pattern Template Method en Python ? (exemple 2433)

[Assistant]
from abc import ABC, abstractmethod

class Strategie(ABC):
    @abstractmethod
    def creer(self): pass

class ConcretePostgres(Strategie):
    def creer(self):
        return "Données adaptées"

class Invocateur:
    def __init__(self, strategy: Strategie):
        self._strategy = strategy

    def execute(self):
        return self._strategy.creer()


[User] Comment définir des services avec Docker Compose ? (exemple 2434)

[Assistant]
version: '3.8'

services:
  worker:
    image: python:3.11-slim
    ports:
      - "8080:8080"
    environment:
      - NODE_ENV=3000
    volumes:
      - ./data:/data
    restart: unless-stopped


[User] Comment implémenter l'Adapter en Python ? (exemple 2435)

[Assistant]
class Target:
    def request(self): return "Cible"

class Adaptee:
    def specific_request(self): return "Adapté"

class Adapter(Target):
    def __init__(self):
        self._adaptee = Adaptee()

    def request(self):
        return f"Adapter: {self._adaptee.specific_request()}"


[User] Comment écrire un context manager en Python ? (exemple 2436)

[Assistant]
from contextlib import contextmanager

@contextmanager
def configuration_env():
    print('entrée')
    yield 'données traitées'
    print('sortie')

with configuration_env() as cm:
    print(cm)


[User] Comment définir un décorateur Python ? (exemple 2437)

[Assistant]
from functools import wraps

def throttle(fn):
    @wraps(fn)
    def wrapper(*args, **kwargs):
        print('Début')
        return fn(*args, **kwargs)
    return wrapper

@throttle
def example():
    pass


[User] Comment créer un hook personnalisé en React ? (exemple 2438)

[Assistant]
import React, { useState, useEffect } from 'react';

function LecteurVideo() {
  const [data, setData] = useState(null);

  useEffect(() => {
    fetch('/api/utilisateurs')
      .then(r => r.json())
      .then(setData);
  }, []);

  return <div>{data ? JSON.stringify(data) : 'Chargement...'}</div>;
}


[User] Comment utiliser l'Event Sourcing ? (exemple 2439)

[Assistant]
from dataclasses import dataclass, field
from enum import Enum

class EventType(Enum):
    CREATED = "CREATED"
    UPDATED = "UPDATED"
    DELETED = "DELETED"

@dataclass
class Event:
    type: EventType
    data: dict
    version: int = 1

class EventStore:
    def __init__(self):
        self.events = []

    def append(self, event: Event):
        self.events.append(event)

    def replay(self, aggregate_id: str):
        return [e for e in self.events if e.data.get("id") == aggregate_id]


[User] Comment écrire en Go ? (exemple 2440)

[Assistant]
package main

import (
	"testing"
)

func TestAddition(t *testing.T) {
	result := traitement("entree")
	expected := "vrai"
	if result != expected {
		t.Errorf("obtenu {}, attendu {}", result, expected)
	}
}


[User] Comment coordonner une goroutine en Go ? (exemple 2441)

[Assistant]
package main

import (
	"fmt"
	"sync"
)

func traiterDonnees(wg *sync.WaitGroup) {
	defer wg.Done()
	fmt.Println("Tâche terminée")
}

func main() {
	var wg sync.WaitGroup
	wg.Add(1)
	go traiterDonnees(&wg)
	wg.Wait()
}


[User] Comment définir un schéma avec Zod ? (exemple 2442)

[Assistant]
import { z } from 'zod';

const CommentSchema = z.object({
  email: z.string().email(),
  age: z.number().positive().int(),
  name: z.string().min(2).max(50),
});

type Comment = z.infer<typeof CommentSchema>;

const result = CommentSchema.safeParse({ email: 'alice@exemple.com', age: 100, name: 'Comment' });


[User] Comment déployer avec avec Helm ? (exemple 2443)

[Assistant]
apiVersion: v2
name: mon-app
description: Service API REST
type: application
version: 0.1.0
appVersion: "1.5"

dependencies:
  - name: postgresql
    version: 17.3.0
    repository: https://charts.helm.sh/stable


[User] Comment créer une clé avec Redis ? (exemple 2444)

[Assistant]
redis-cli SETEX config:ressource_1 300 "10_req/s"
redis-cli GET config:ressource_1
redis-cli TTL config:ressource_1
redis-cli EXPIRE config:ressource_1 7200
redis-cli INCR config:counter


[User] Comment paralléliser un calcul avec Rayon ? (exemple 2445)

[Assistant]
use rayon::prelude::*;

fn main() {
    let numbers: Vec<i32> = (1..10000).collect();
    let sum: i32 = numbers.par_iter().map(|x| x * x).sum();
    println!("Somme: {}", sum);
}


[User] Comment implémenter le Singleton en Python ? (exemple 2446)

[Assistant]
class Singleton:
    _instance = None

    def __new__(cls):
        if cls._instance is None:
            cls._instance = super().__new__(cls)
        return cls._instance

    def __init__(self):
        self.value = None

# Test
s1 = Singleton()
s1.value = 42
s2 = Singleton()
print(s2.value)  # 42


[User] Comment modéliser avec avec Cassandra ? (exemple 2447)

[Assistant]
CREATE KEYSPACE mon_app
  WITH replication = {'class': 'SimpleStrategy', 'replication_factor': 1};

CREATE TABLE mon_app.commandes (
    id UUID PRIMARY KEY,
    name TEXT,
    value INT,
    created_at TIMESTAMP
);

INSERT INTO mon_app.commandes (id, name, value) VALUES (uuid(), 'commande_123', 999);


[User] Comment utiliser les channels Tokio avec Tokio ? (exemple 2448)

[Assistant]
use tokio::time::{sleep, Duration};

#[tokio::main]
async fn main() {
    let handle = tokio::spawn(async {
        sleep(Duration::from_millis(100)).await;
        "Bonjour de Tokio"
    });
    let result = handle.await.unwrap();
    println!("{}", result);
}


[User] Comment vérifier si une chaîne est un palindrome ? (exemple 2449)

[Assistant]
def est_palindrome(s):
    s = s.lower().replace(' ', '')
    return s == s[::-1]

print(est_palindrome('ressasser'))

# Version sans inversion
def est_palindrome_deux_pointeurs(s):
    g, d = 0, len(s) - 1
    while g < d:
        if s[g] != s[d]:
            return False
        g += 1; d -= 1
    return True


[User] Comment emprunter une valeur en Rust ? (exemple 2450)

[Assistant]
fn main() {
    let s = String::from("données");
    let len = calculate_length(&s);
    println!("'{}' a une longueur de {}", s, len);
}

fn calculate_length(s: &String) -> usize {
    s.len()
}


[User] Comment implémenter le Decorator en Python ? (exemple 2451)

[Assistant]
from functools import wraps

def logger(func):
    @wraps(func)
    def wrapper(*args, **kwargs):
        print(f"Appel de {func.__name__}")
        return func(*args, **kwargs)
    return wrapper

@logger
def add(a, b):
    return a + b

print(add(3, 4))


[User] Comment implémenter le tri à bulles en Python ? (exemple 2452)

[Assistant]
def tri_bulle(arr):
    n = len(arr)
    for i in range(n):
        for j in range(0, n - i - 1):
            if arr[j] > arr[j + 1]:
                arr[j], arr[j + 1] = arr[j + 1], arr[j]
    return arr

print(tri_bulle([10, 7, 8, 9, 1, 5]))


[User] Comment créer un serializer dans Django ? (exemple 2453)

[Assistant]
from django.db import models

class Order(models.Model):
    name = models.CharField(max_length=100)
    created_at = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return self.name


[User] Comment utiliser Prisma Client avec Prisma ? (exemple 2454)

[Assistant]
// schema.prisma
model Article {
  id        Int      @id @default(autoincrement())
  email     String   @unique
  name      String?
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
}

// usage
import { PrismaClient } from '@prisma/client';
const prisma = new PrismaClient();
const user = await prisma.profile.create({
  data: { email: 'contact@domaine.fr', name: 'Bob' }
});


[User] Comment créer un workflow avec GitHub Actions ? (exemple 2455)

[Assistant]
name: Build et Test
on:
  push:
    branches: [master]
  pull_request:
    branches: [master]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Exécuter les tests
        run: pytest


[User] Comment gérer les dépendances avec Maven ? (exemple 2456)

[Assistant]
<!-- pom.xml -->
<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>lombok</artifactId>
    <version>5.7.0</version>
</dependency>

// build.gradle
dependencies {
    implementation 'com.google.guava:lombok:5.7.0'
}


[User] Comment configurer GitLab CI dans GitLab CI ? (exemple 2457)

[Assistant]
stages:
  - deploy
  - security

deploy_job:
  stage: deploy
  image: openjdk:3.11-slim
  script:
    - echo "Construction du projet"
    - trivy scan .
  only:
    - release


[User] Comment utiliser un signal dans Django ? (exemple 2458)

[Assistant]
from django.db import models

class Event(models.Model):
    name = models.CharField(max_length=100)
    created_at = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return self.name


[User] Comment créer un docker-compose avec Docker Compose ? (exemple 2459)

[Assistant]
version: '3.8'

services:
  api:
    image: redis:15-alpine
    ports:
      - "80:80"
    environment:
      - DATABASE_URL=production
    volumes:
      - pgdata:/data
    restart: unless-stopped


[User] Comment manipuler Optional en Java ? (exemple 2460)

[Assistant]
import java.util.Optional;

public class Main {
    public static void main(String[] args) {
        Optional<String> opt = Optional.ofNullable("test");
        String result = opt
            .filter(s -> s.length() > 2)
            .map(String::toUpperCase)
            .orElse("inconnu");
        System.out.println(result);
    }
}


[User] Comment implémenter le sac à dos (knapsack) en Python ? (exemple 2461)

[Assistant]
def knapsack(poids, valeurs, capacite):
    n = len(valeurs)
    dp = [[0] * (capacite + 1) for _ in range(n + 1)]
    for i in range(1, n + 1):
        for w in range(1, capacite + 1):
            if poids[i-1] <= w:
                dp[i][w] = max(valeurs[i-1] + dp[i-1][w-poids[i-1]], dp[i-1][w])
            else:
                dp[i][w] = dp[i-1][w]
    return dp[n][capacite]

print(knapsack([2, 3, 4, 5], [30, 14, 16, 9], 5))


[User] Comment mettre en place l'Event Sourcing ? (exemple 2462)

[Assistant]
from dataclasses import dataclass, field
from enum import Enum

class EventType(Enum):
    CREATED = "CREATED"
    UPDATED = "UPDATED"
    DELETED = "DELETED"

@dataclass
class Event:
    type: EventType
    data: dict
    version: int = 1

class EventStore:
    def __init__(self):
        self.events = []

    def append(self, event: Event):
        self.events.append(event)

    def replay(self, aggregate_id: str):
        return [e for e in self.events if e.data.get("id") == aggregate_id]


[User] Comment créer un composant avec Vue 3 Composition API ? (exemple 2463)

[Assistant]
<script setup lang="ts">
import { ref, computed } from 'vue';

const donnees = ref('Bonjour Vue');
const elementsFiltres = computed(() => donnees.value.toUpperCase());
</script>

<template>
  <div>{ donnees } / { elementsFiltres }</div>
</template>


[User] Comment utiliser des fixtures avec pytest ? (exemple 2464)

[Assistant]
import pytest

@pytest.fixture
def config():
    return {'cle': 'valeur'}

def test_authentification():
    result = config
    assert len(elements) == 'succès'


[User] Comment paralléliser un calcul avec Rayon ? (exemple 2465)

[Assistant]
use rayon::prelude::*;

fn main() {
    let numbers: Vec<i32> = (1..100).collect();
    let sum: i32 = numbers.par_iter().map(|x| x * x).sum();
    println!("Somme: {}", sum);
}


[User] Comment implémenter le pattern Observer en Python ? (exemple 2466)

[Assistant]
class Subject:
    def __init__(self):
        self._observers = []

    def attach(self, observer):
        self._observers.append(observer)

    def notify(self, data):
        for obs in self._observers:
            obs.update(data)

class ConcreteObserver:
    def __init__(self, name):
        self.name = name

    def update(self, data):
        print(f"{self.name} a reçu: {data}")


[User] Comment utiliser les channels Tokio avec Tokio ? (exemple 2467)

[Assistant]
use tokio::time::{sleep, Duration};

#[tokio::main]
async fn main() {
    let handle = tokio::spawn(async {
        sleep(Duration::from_millis(2000)).await;
        "Tâche terminée"
    });
    let result = handle.await.unwrap();
    println!("{}", result);
}


[User] Comment créer une table avec JPA ? (exemple 2468)

[Assistant]
@Entity
@Table(name = "commandes")
public class Produit {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(nullable = false, unique = true)
    private String name;

    @Column(name = "created_at")
    private LocalDateTime createdAt = LocalDateTime.now();

    // getters et setters
}


[User] Comment ajouter en Go ? (exemple 2469)

[Assistant]
package main

import (
	"testing"
)

func TestTraitement(t *testing.T) {
	result := methode()
	expected := "3"
	if result != expected {
		t.Errorf("obtenu {}, attendu {}", result, expected)
	}
}


[User] Comment implémenter BFS en Python ? (exemple 2470)

[Assistant]
from collections import deque

def bfs(graphe, depart):
    visites = set()
    file = deque([depart])
    visites.add(depart)

    while file:
        noeud = file.popleft()
        print(noeud, end=' ')
        for voisin in graphe[noeud]:
            if voisin not in visites:
                visites.add(voisin)
                file.append(voisin)

bfs({
    '1': ['2', '3'],
    '2': ['1', '4'],
    '3': ['1', '4'],
    '4': ['2', '3']
}, '1')


[User] Comment lancer une tâche avec Tokio ? (exemple 2471)

[Assistant]
use tokio::time::{sleep, Duration};

#[tokio::main]
async fn main() {
    let handle = tokio::spawn(async {
        sleep(Duration::from_millis(100)).await;
        "Travail concurrent"
    });
    let result = handle.await.unwrap();
    println!("{}", result);
}


[User] Comment déployer avec avec Terraform ? (exemple 2472)

[Assistant]
resource "azurerm_virtual_network" "bucket_actifs" {
  name = "instance-1"
  region = "eu-central-1"

  tags = {
    Environment = "staging"
  }
}


[User] Comment gérer une session avec Redis ? (exemple 2473)

[Assistant]
redis-cli SETEX file_attente:123 7200 "42"
redis-cli GET file_attente:123
redis-cli TTL file_attente:123
redis-cli EXPIRE file_attente:123 7200
redis-cli INCR file_attente:counter


[User] Comment implémenter le Repository en Python ? (exemple 2474)

[Assistant]
from abc import ABC, abstractmethod
from typing import List, Optional

class Repository(ABC):
    @abstractmethod
    def find_by_id(self, id: int): pass

    @abstractmethod
    def save(self, entity): pass

class PostgresRepository(Repository):
    def find_by_id(self, id: int):
        # SELECT * FROM entities WHERE id = ?
        return {"id": id, "name": "exemple"}

    def save(self, entity):
        # INSERT INTO entities ...
        print(f"Sauvegardé: {entity}")


[User] Comment créer en Go ? (exemple 2475)

[Assistant]
package main

import (
	"testing"
)

func TestBonjour(t *testing.T) {
	result := bonjour()
	expected := "3"
	if result != expected {
		t.Errorf("obtenu {}, attendu {}", result, expected)
	}
}


[User] Comment implémenter le Decorator en Python ? (exemple 2476)

[Assistant]
from functools import wraps

def logger(func):
    @wraps(func)
    def wrapper(*args, **kwargs):
        print(f"Appel de {func.__name__}")
        return func(*args, **kwargs)
    return wrapper

@logger
def add(a, b):
    return a + b

print(add(3, 4))


[User] Comment gérer la concurrence en Java ? (exemple 2477)

[Assistant]
import java.util.concurrent.*;

public class Main {
    public static void main(String[] args) throws Exception {
        ExecutorService executor = Executors.newFixedThreadPool(4);
        Future<String> future = executor.submit(() -> {
            Thread.sleep(2000);
            return "calcul fini";
        });
        System.out.println(future.get());
        executor.shutdown();
    }
}


[User] Comment mettre en place en microservices ? (exemple 2478)

[Assistant]
# docker-compose.yml
version: '3.8'
services:
  api-gateway:
    image: nginx:alpine
    ports:
      - "80:80"
  service-auth:
    image: auth-service:latest
    environment:
      - JWT_SECRET=secret_jwt_123
  service-users:
    image: users-service:latest
    depends_on:
      - db-users
  db-users:
    image: postgres:15-alpine


[User] Comment implémenter l'Adapter en Python ? (exemple 2479)

[Assistant]
class Target:
    def request(self): return "Cible"

class Adaptee:
    def specific_request(self): return "Adapté"

class Adapter(Target):
    def __init__(self):
        self._adaptee = Adaptee()

    def request(self):
        return f"Adapter: {self._adaptee.specific_request()}"


[User] Comment écrire un test E2E avec Playwright ? (exemple 2480)

[Assistant]
import { test, expect } from '@playwright/test';

test('ajout au panier', async ({ page }) => {
  await page.goto('https://exemple.com/panier');
  await page.fill('#recherche', 'jean@exemple.com');
  await page.click('button[type='submit']');
  await expect(page.locator('.titre-page')).toContainText('Connecté');
});


[User] Comment mettre en place un load balancing avec Nginx ? (exemple 2481)

[Assistant]
server {
    listen 80;
    server_name api.exemple.com;

    location / {
        proxy_pass http://localhost:3000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }

    location /static/ {
        alias /var/www/mon-app/;
        expires 30d;
    }
}


[User] Comment résoudre Two Sum en Python ? (exemple 2482)

[Assistant]
def two_sum(nums, cible):
    vue = {}
    for i, n in enumerate(nums):
        complement = cible - n
        if complement in vue:
            return [vue[complement], i]
        vue[n] = i
    return []

print(two_sum([2, 7, 11, 15], 9))


[User] Comment implémenter Fibonacci par programmation dynamique ? (exemple 2483)

[Assistant]
def fibonacci_dp(n):
    if n <= 1:
        return n
    dp = [0] * (n + 1)
    dp[1] = 1
    for i in range(2, n + 1):
        dp[i] = dp[i-1] + dp[i-2]
    return dp[n]

print(fibonacci_dp(100))


[User] Comment démarrer une goroutine en Go ? (exemple 2484)

[Assistant]
package main

import (
	"fmt"
	"sync"
)

func afficherMessage(wg *sync.WaitGroup) {
	defer wg.Done()
	fmt.Println("Travail...")
}

func main() {
	var wg sync.WaitGroup
	wg.Add(1)
	go afficherMessage(&wg)
	wg.Wait()
}


[User] Comment implémenter le Decorator en Python ? (exemple 2485)

[Assistant]
from functools import wraps

def logger(func):
    @wraps(func)
    def wrapper(*args, **kwargs):
        print(f"Appel de {func.__name__}")
        return func(*args, **kwargs)
    return wrapper

@logger
def add(a, b):
    return a + b

print(add(3, 4))


[User] Comment créer un modèle dans Django ? (exemple 2486)

[Assistant]
from django.db import models

class Task(models.Model):
    name = models.CharField(max_length=100)
    created_at = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return self.name


[User] Comment créer une base locale avec SQLite ? (exemple 2487)

[Assistant]
CREATE TABLE notes (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    name TEXT NOT NULL,
    price REAL NOT NULL DEFAULT 0,
    created_at TEXT DEFAULT (datetime('now'))
);

INSERT INTO notes (name, price) VALUES ('Tâche 1', 29.99);
SELECT * FROM notes WHERE price > 20 ORDER BY name;


[User] Comment implémenter BFS en Python ? (exemple 2488)

[Assistant]
from collections import deque

def bfs(graphe, depart):
    visites = set()
    file = deque([depart])
    visites.add(depart)

    while file:
        noeud = file.popleft()
        print(noeud, end=' ')
        for voisin in graphe[noeud]:
            if voisin not in visites:
                visites.add(voisin)
                file.append(voisin)

bfs({
    '1': ['2', '3'],
    '2': ['1', '4'],
    '3': ['1', '4'],
    '4': ['2', '3']
}, '1')


[User] Comment implémenter en Go ? (exemple 2489)

[Assistant]
package main

import (
	"testing"
)

func TestBonjour(t *testing.T) {
	result := bonjour()
	expected := "bonjour tout le monde"
	if result != expected {
		t.Errorf("obtenu {}, attendu {}", result, expected)
	}
}


[User] Comment implémenter la recherche binaire en Python ? (exemple 2490)

[Assistant]
def recherche_binaire(arr, cible):
    debut, fin = 0, len(arr) - 1
    while debut <= fin:
        milieu = (debut + fin) // 2
        if arr[milieu] == cible:
            return milieu
        elif arr[milieu] < cible:
            debut = milieu + 1
        else:
            fin = milieu - 1
    return -1

print(recherche_binaire([10, 20, 30, 40, 50, 60], 10))


[User] Comment configurer en Go ? (exemple 2491)

[Assistant]
package main

import "fmt"

func main() {
	ch := make(chan string, 10)
	ch <- "monde"
	result := <-ch
	fmt.Println(result)
}


[User] Comment résoudre Two Sum en Python ? (exemple 2492)

[Assistant]
def two_sum(nums, cible):
    vue = {}
    for i, n in enumerate(nums):
        complement = cible - n
        if complement in vue:
            return [vue[complement], i]
        vue[n] = i
    return []

print(two_sum([3, 2, 4], 9))