task_url stringlengths 30 116 | task_name stringlengths 2 86 | task_description stringlengths 0 14.4k | language_url stringlengths 2 53 | language_name stringlengths 1 52 | code stringlengths 0 61.9k |
|---|---|---|---|---|---|
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #Frink | Frink |
a = "Monkey"
b = a
|
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #FutureBasic | FutureBasic |
include "NSLog.incl"
CFStringRef original, copy
original = @"Hello!"
copy = fn StringWithString( original )
NSLog( @"%@", copy )
HandleEvents
|
http://rosettacode.org/wiki/Constrained_random_points_on_a_circle | Constrained random points on a circle | Task
Generate 100 <x,y> coordinate pairs such that x and y are integers sampled from the uniform distribution with the condition that
10
≤
x
2
+
y
2
≤
15
{\displaystyle 10\leq {\sqrt {x^{2}+y^{2}}}\leq 15}
.
Then display/plot them. The outcome should be a "fuzzy" circle. The actual number of point... | #Ada | Ada | with Ada.Text_IO;
with Ada.Numerics.Discrete_Random;
procedure Circle is
-- extreme coordinate values are -15:0, 15:0, 0:-15, 0:15
subtype Coordinate is Integer range -15 .. 15;
type Point is record
X, Y : Coordinate;
end record;
type Point_List is array (Positive range <>) of Point;
function ... |
http://rosettacode.org/wiki/Convex_hull | Convex hull | Find the points which form a convex hull from a set of arbitrary two dimensional points.
For example, given the points (16,3), (12,17), (0,6), (-4,-6), (16,6), (16,-7), (16,-3), (17,-4), (5,19), (19,-8), (3,16), (12,13), (3,-4), (17,5), (-3,15), (-3,-9), (0,11), (-9,-3), (-4,-2) and (12,10) the convex hull would be (-... | #ATS | ATS | //
// Convex hulls by Andrew's monotone chain algorithm.
//
// For a description of the algorithm, see
// https://en.wikibooks.org/w/index.php?title=Algorithm_Implementation/Geometry/Convex_hull/Monotone_chain&stableid=40169
//
//
// The implementation is designed for use with a garbage collector.
// In other words, so... |
http://rosettacode.org/wiki/Convert_seconds_to_compound_duration | Convert seconds to compound duration | Task
Write a function or program which:
takes a positive integer representing a duration in seconds as input (e.g., 100), and
returns a string which shows the same duration decomposed into:
weeks,
days,
hours,
minutes, and
seconds.
This is detailed below (e.g., "2 hr, 59 sec").
Demonstrat... | #EasyLang | EasyLang | func split sec . s$ .
divs[] = [ 60 60 24 7 ]
n$[] = [ "sec" "min" "hr" "d" "wk" ]
len r[] 5
for i range 4
r[i] = sec mod divs[i]
sec = sec div divs[i]
.
r[4] = sec
s$ = ""
for i = 4 downto 0
if r[i] <> 0
if s$ <> ""
s$ &= ", "
.
s$ &= r[i] & " " & n$[i]
.
.
.... |
http://rosettacode.org/wiki/Constrained_genericity | Constrained genericity | Constrained genericity or bounded quantification means
that a parametrized type or function (see parametric polymorphism)
can only be instantiated on types fulfilling some conditions,
even if those conditions are not used in that function.
Say a type is called "eatable" if you can call the function eat on it.
Write a ... | #Ruby | Ruby | class Foodbox
def initialize (*food)
raise ArgumentError, "food must be eadible" unless food.all?{|f| f.respond_to?(:eat)}
@box = food
end
end
class Fruit
def eat; end
end
class Apple < Fruit; end
p Foodbox.new(Fruit.new, Apple.new)
# => #<Foodbox:0x00000001420c88 @box=[#<Fruit:0x00000001420cd8>, #... |
http://rosettacode.org/wiki/Constrained_genericity | Constrained genericity | Constrained genericity or bounded quantification means
that a parametrized type or function (see parametric polymorphism)
can only be instantiated on types fulfilling some conditions,
even if those conditions are not used in that function.
Say a type is called "eatable" if you can call the function eat on it.
Write a ... | #Rust | Rust |
// This declares the "Eatable" constraint. It could contain no function.
trait Eatable {
fn eat();
}
// This declares the generic "FoodBox" type,
// whose parameter must satisfy the "Eatable" constraint.
// The objects of this type contain a vector of eatable objects.
struct FoodBox<T: Eatable> {
_data: Vec... |
http://rosettacode.org/wiki/Constrained_genericity | Constrained genericity | Constrained genericity or bounded quantification means
that a parametrized type or function (see parametric polymorphism)
can only be instantiated on types fulfilling some conditions,
even if those conditions are not used in that function.
Say a type is called "eatable" if you can call the function eat on it.
Write a ... | #Sather | Sather | abstract class $EDIBLE is
eat;
end;
class FOOD < $EDIBLE is
readonly attr name:STR;
eat is
#OUT + "eating " + self.name + "\n";
end;
create(name:STR):SAME is
res ::= new;
res.name := name;
return res;
end;
end;
class CAR is
readonly attr name:STR;
create(name:STR):SAME is
res ::=... |
http://rosettacode.org/wiki/Constrained_genericity | Constrained genericity | Constrained genericity or bounded quantification means
that a parametrized type or function (see parametric polymorphism)
can only be instantiated on types fulfilling some conditions,
even if those conditions are not used in that function.
Say a type is called "eatable" if you can call the function eat on it.
Write a ... | #Scala | Scala | type Eatable = { def eat: Unit }
class FoodBox(coll: List[Eatable])
case class Fish(name: String) {
def eat {
println("Eating "+name)
}
}
val foodBox = new FoodBox(List(new Fish("salmon"))) |
http://rosettacode.org/wiki/Consecutive_primes_with_ascending_or_descending_differences | Consecutive primes with ascending or descending differences | Task
Find and display here on this page, the longest sequence of consecutive prime numbers where the differences between the primes are strictly ascending.
Do the same for sequences of primes where the differences are strictly descending.
In both cases, show the sequence for primes < 1,000,000.
If there... | #Phix | Phix | integer pn = 1, -- prime numb
lp = 2, -- last prime
lg = 0, -- last gap
pd = 0 -- prev d
sequence cr = {0,0}, -- curr run [a,d]
mr = {{0},{0}} -- max runs ""
while true do
pn += 1
integer p = get_prime(pn), gap = p-lp,
d = compare(gap,lg)
if p>1e6 then exit ... |
http://rosettacode.org/wiki/Continued_fraction | Continued fraction | continued fraction
Mathworld
a
0
+
b
1
a
1
+
b
2
a
2
+
b
3
a
3
+
⋱
{\displaystyle a_{0}+{\cfrac {b_{1}}{a_{1}+{\cfrac {b_{2}}{a_{2}+{\cfrac {b_{3}}{a_{3}+\ddots }}}}}}}
The task is to write a program which generates su... | #CoffeeScript | CoffeeScript | # Compute a continuous fraction of the form
# a0 + b1 / (a1 + b2 / (a2 + b3 / ...
continuous_fraction = (f) ->
a = f.a
b = f.b
c = 1
for n in [100000..1]
c = b(n) / (a(n) + c)
a(0) + c
# A little helper.
p = (a, b) ->
console.log a
console.log b
console.log "---"
do ->
fsqrt2 =
a: (n) -> i... |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #Gambas | Gambas | Public Sub main()
Dim src As String
Dim dst As String
src = "Hello"
dst = src
Print src
Print dst
End |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #GAP | GAP | #In GAP strings are lists of characters. An affectation simply copy references
a := "more";
b := a;
b{[1..4]} := "less";
a;
# "less"
# Here is a true copy
a := "more";
b := ShallowCopy(a);
b{[1..4]} := "less";
a;
# "more" |
http://rosettacode.org/wiki/Constrained_random_points_on_a_circle | Constrained random points on a circle | Task
Generate 100 <x,y> coordinate pairs such that x and y are integers sampled from the uniform distribution with the condition that
10
≤
x
2
+
y
2
≤
15
{\displaystyle 10\leq {\sqrt {x^{2}+y^{2}}}\leq 15}
.
Then display/plot them. The outcome should be a "fuzzy" circle. The actual number of point... | #ALGOL_68 | ALGOL 68 | PROC clrscr = VOID:
printf(($g"[2J"$,REPR 27)); # ansi.sys #
PROC gotoxy = (INT x,y)VOID:
printf(($g"["g(0)";"g(0)"H"$,REPR 27, y,x)); # ansi.sys #
MODE POINT = STRUCT(
INT x,y
);
INT radius = 15;
INT inside radius = 10;
POINT center = (radius+1, radius+1);
FLEX[0]POINT set;
PROC swap ... |
http://rosettacode.org/wiki/Convex_hull | Convex hull | Find the points which form a convex hull from a set of arbitrary two dimensional points.
For example, given the points (16,3), (12,17), (0,6), (-4,-6), (16,6), (16,-7), (16,-3), (17,-4), (5,19), (19,-8), (3,16), (12,13), (3,-4), (17,5), (-3,15), (-3,-9), (0,11), (-9,-3), (-4,-2) and (12,10) the convex hull would be (-... | #C | C | #include <assert.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
typedef struct tPoint {
int x, y;
} Point;
bool ccw(const Point *a, const Point *b, const Point *c) {
return (b->x - a->x) * (c->y - a->y)
> (b->y - a->y) * (c->x - a->x);
}
int comparePoints(const void *lhs, const vo... |
http://rosettacode.org/wiki/Convert_seconds_to_compound_duration | Convert seconds to compound duration | Task
Write a function or program which:
takes a positive integer representing a duration in seconds as input (e.g., 100), and
returns a string which shows the same duration decomposed into:
weeks,
days,
hours,
minutes, and
seconds.
This is detailed below (e.g., "2 hr, 59 sec").
Demonstrat... | #Elixir | Elixir | defmodule Convert do
@minute 60
@hour @minute*60
@day @hour*24
@week @day*7
@divisor [@week, @day, @hour, @minute, 1]
def sec_to_str(sec) do
{_, [s, m, h, d, w]} =
Enum.reduce(@divisor, {sec,[]}, fn divisor,{n,acc} ->
{rem(n,divisor), [div(n,divisor) | acc]}
end)
[... |
http://rosettacode.org/wiki/Constrained_genericity | Constrained genericity | Constrained genericity or bounded quantification means
that a parametrized type or function (see parametric polymorphism)
can only be instantiated on types fulfilling some conditions,
even if those conditions are not used in that function.
Say a type is called "eatable" if you can call the function eat on it.
Write a ... | #Sidef | Sidef | class FoodBox(*food { .all { .respond_to(:eat) } }) { }
class Fruit { method eat { ... } }
class Apple < Fruit { }
say FoodBox(Fruit(), Apple()).dump #=> FoodBox(food: [Fruit(), Apple()])
say FoodBox(Apple(), "foo") #!> ERROR: class `FoodBox` !~ (Apple, String) |
http://rosettacode.org/wiki/Constrained_genericity | Constrained genericity | Constrained genericity or bounded quantification means
that a parametrized type or function (see parametric polymorphism)
can only be instantiated on types fulfilling some conditions,
even if those conditions are not used in that function.
Say a type is called "eatable" if you can call the function eat on it.
Write a ... | #Swift | Swift | protocol Eatable {
func eat()
} |
http://rosettacode.org/wiki/Constrained_genericity | Constrained genericity | Constrained genericity or bounded quantification means
that a parametrized type or function (see parametric polymorphism)
can only be instantiated on types fulfilling some conditions,
even if those conditions are not used in that function.
Say a type is called "eatable" if you can call the function eat on it.
Write a ... | #Wren | Wren | // abstract class
class Eatable {
eat() { /* override in child class */ }
}
class FoodBox {
construct new(contents) {
if (contents.any { |e| !(e is Eatable) }) {
Fiber.abort("All FoodBox elements must be eatable.")
}
_contents = contents
}
contents { _... |
http://rosettacode.org/wiki/Consecutive_primes_with_ascending_or_descending_differences | Consecutive primes with ascending or descending differences | Task
Find and display here on this page, the longest sequence of consecutive prime numbers where the differences between the primes are strictly ascending.
Do the same for sequences of primes where the differences are strictly descending.
In both cases, show the sequence for primes < 1,000,000.
If there... | #Python | Python |
from sympy import sieve
primelist = list(sieve.primerange(2,1000000))
listlen = len(primelist)
# ascending
pindex = 1
old_diff = -1
curr_list=[primelist[0]]
longest_list=[]
while pindex < listlen:
diff = primelist[pindex] - primelist[pindex-1]
if diff > old_diff:
curr_list.append(primelist... |
http://rosettacode.org/wiki/Consecutive_primes_with_ascending_or_descending_differences | Consecutive primes with ascending or descending differences | Task
Find and display here on this page, the longest sequence of consecutive prime numbers where the differences between the primes are strictly ascending.
Do the same for sequences of primes where the differences are strictly descending.
In both cases, show the sequence for primes < 1,000,000.
If there... | #Raku | Raku | use Math::Primesieve;
use Lingua::EN::Numbers;
my $sieve = Math::Primesieve.new;
my $limit = 1000000;
my @primes = $sieve.primes($limit);
sub runs (&op) {
my $diff = 1;
my $run = 1;
my @diff = flat 1, (1..^@primes).map: {
my $next = @primes[$_] - @primes[$_ - 1];
if &op($next, $dif... |
http://rosettacode.org/wiki/Continued_fraction | Continued fraction | continued fraction
Mathworld
a
0
+
b
1
a
1
+
b
2
a
2
+
b
3
a
3
+
⋱
{\displaystyle a_{0}+{\cfrac {b_{1}}{a_{1}+{\cfrac {b_{2}}{a_{2}+{\cfrac {b_{3}}{a_{3}+\ddots }}}}}}}
The task is to write a program which generates su... | #Common_Lisp | Common Lisp | (defun estimate-continued-fraction (generator n)
(let ((temp 0))
(loop for n1 from n downto 1
do (multiple-value-bind (a b)
(funcall generator n1)
(setf temp (/ b (+ a temp)))))
(+ (funcall generator 0) temp)))
(format t "sqrt(2) = ~a~%" (coerce (estimate-continued-fraction
(lamb... |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #GML | GML | src = "string";
dest = src; |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #Go | Go | src := "Hello"
dst := src |
http://rosettacode.org/wiki/Constrained_random_points_on_a_circle | Constrained random points on a circle | Task
Generate 100 <x,y> coordinate pairs such that x and y are integers sampled from the uniform distribution with the condition that
10
≤
x
2
+
y
2
≤
15
{\displaystyle 10\leq {\sqrt {x^{2}+y^{2}}}\leq 15}
.
Then display/plot them. The outcome should be a "fuzzy" circle. The actual number of point... | #AutoHotkey | AutoHotkey | z=100 ; x = x-coord; y = y-coord; z = count; pBitmap = a pointer to the image; f = filename
pToken := Gdip_Startup()
pBitmap := Gdip_CreateBitmap(31, 32)
While z
{
Random, x, -20, 20
Random, y, -20,20
If ( t := sqrt(x**2 + y**2) ) >= 10 && t <= 15
Gdip_SetPixel(pBitmap, x+15, y+16, 255<<24), z--
}
Gdip_SaveB... |
http://rosettacode.org/wiki/Convex_hull | Convex hull | Find the points which form a convex hull from a set of arbitrary two dimensional points.
For example, given the points (16,3), (12,17), (0,6), (-4,-6), (16,6), (16,-7), (16,-3), (17,-4), (5,19), (19,-8), (3,16), (12,13), (3,-4), (17,5), (-3,15), (-3,-9), (0,11), (-9,-3), (-4,-2) and (12,10) the convex hull would be (-... | #C.23 | C# | using System;
using System.Collections.Generic;
namespace ConvexHull {
class Point : IComparable<Point> {
private int x, y;
public Point(int x, int y) {
this.x = x;
this.y = y;
}
public int X { get => x; set => x = value; }
public int Y { get => ... |
http://rosettacode.org/wiki/Convert_seconds_to_compound_duration | Convert seconds to compound duration | Task
Write a function or program which:
takes a positive integer representing a duration in seconds as input (e.g., 100), and
returns a string which shows the same duration decomposed into:
weeks,
days,
hours,
minutes, and
seconds.
This is detailed below (e.g., "2 hr, 59 sec").
Demonstrat... | #Erlang | Erlang |
-module(convert_seconds).
-export([test/0]).
test() ->
lists:map(fun convert/1, [7259, 86400, 6000000]),
ok.
convert(Seconds) ->
io:format(
"~7s seconds = ~s\n",
[integer_to_list(Seconds), compoundDuration(Seconds)] ).
% Compound duration of t seconds. The argument is assumed to be positive.
compound... |
http://rosettacode.org/wiki/Constrained_genericity | Constrained genericity | Constrained genericity or bounded quantification means
that a parametrized type or function (see parametric polymorphism)
can only be instantiated on types fulfilling some conditions,
even if those conditions are not used in that function.
Say a type is called "eatable" if you can call the function eat on it.
Write a ... | #zkl | zkl | class Eatable{ var v;
fcn eat{ println("munching ",self.topdog.name); }
}
class FoodBox{
fcn init(food1,food2,etc){
editable,garbage:=vm.arglist.filter22("isChildOf",Eatable);
var contents=editable;
if(garbage) println("Rejecting: ",garbage);
}
} |
http://rosettacode.org/wiki/Consecutive_primes_with_ascending_or_descending_differences | Consecutive primes with ascending or descending differences | Task
Find and display here on this page, the longest sequence of consecutive prime numbers where the differences between the primes are strictly ascending.
Do the same for sequences of primes where the differences are strictly descending.
In both cases, show the sequence for primes < 1,000,000.
If there... | #REXX | REXX | /*REXX program finds the longest sequence of consecutive primes where the differences */
/*──────────── between the primes are strictly ascending; also for strictly descending.*/
parse arg hi cols . /*obtain optional argument from the CL.*/
if hi=='' | hi=="," then hi= 1000000 ... |
http://rosettacode.org/wiki/Continued_fraction | Continued fraction | continued fraction
Mathworld
a
0
+
b
1
a
1
+
b
2
a
2
+
b
3
a
3
+
⋱
{\displaystyle a_{0}+{\cfrac {b_{1}}{a_{1}+{\cfrac {b_{2}}{a_{2}+{\cfrac {b_{3}}{a_{3}+\ddots }}}}}}}
The task is to write a program which generates su... | #D | D | import std.stdio, std.functional, std.traits;
FP calc(FP, F)(in F fun, in int n) pure nothrow if (isCallable!F) {
FP temp = 0;
foreach_reverse (immutable ni; 1 .. n + 1) {
immutable p = fun(ni);
temp = p[1] / (FP(p[0]) + temp);
}
return fun(0)[0] + temp;
}
int[2] fSqrt2(in int n) p... |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #Groovy | Groovy | def string = 'Scooby-doo-bee-doo' // assigns string object to a variable reference
def stringRef = string // assigns another variable reference to the same object
def stringCopy = new String(string) // copies string value into a new object, and assigns to a third variable reference |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #GUISS | GUISS | Start.Programs,Accessories,Notepad,
Type:Hello world[pling],Highlight:Hello world[pling],
Menu,Edit,Copy,Menu,Edit,Paste |
http://rosettacode.org/wiki/Constrained_random_points_on_a_circle | Constrained random points on a circle | Task
Generate 100 <x,y> coordinate pairs such that x and y are integers sampled from the uniform distribution with the condition that
10
≤
x
2
+
y
2
≤
15
{\displaystyle 10\leq {\sqrt {x^{2}+y^{2}}}\leq 15}
.
Then display/plot them. The outcome should be a "fuzzy" circle. The actual number of point... | #BASIC | BASIC | graphsize 31, 31
for i = 1 to 100
do
x = int(rand * 30) - 15
y = int(rand * 30) - 15
r = sqr(x*x + y*y)
until 10 <= r and r <= 15
color rgb(255, 0, 0)
plot(x+15, y+15)
next i
end |
http://rosettacode.org/wiki/Convex_hull | Convex hull | Find the points which form a convex hull from a set of arbitrary two dimensional points.
For example, given the points (16,3), (12,17), (0,6), (-4,-6), (16,6), (16,-7), (16,-3), (17,-4), (5,19), (19,-8), (3,16), (12,13), (3,-4), (17,5), (-3,15), (-3,-9), (0,11), (-9,-3), (-4,-2) and (12,10) the convex hull would be (-... | #C.2B.2B | C++ | #include <algorithm>
#include <iostream>
#include <ostream>
#include <vector>
#include <tuple>
typedef std::tuple<int, int> point;
std::ostream& print(std::ostream& os, const point& p) {
return os << "(" << std::get<0>(p) << ", " << std::get<1>(p) << ")";
}
std::ostream& print(std::ostream& os, const std::vec... |
http://rosettacode.org/wiki/Convert_seconds_to_compound_duration | Convert seconds to compound duration | Task
Write a function or program which:
takes a positive integer representing a duration in seconds as input (e.g., 100), and
returns a string which shows the same duration decomposed into:
weeks,
days,
hours,
minutes, and
seconds.
This is detailed below (e.g., "2 hr, 59 sec").
Demonstrat... | #F.23 | F# | open System
let convert seconds =
let span = TimeSpan.FromSeconds(seconds |> float)
let (wk, day) = Math.DivRem(span.Days, 7)
let parts =
[(wk, "wk"); (day, "day"); (span.Hours, "hr"); (span.Minutes, "min"); (span.Seconds, "sec")]
let result =
List.foldBack (fun (n, u) acc ->
... |
http://rosettacode.org/wiki/Consecutive_primes_with_ascending_or_descending_differences | Consecutive primes with ascending or descending differences | Task
Find and display here on this page, the longest sequence of consecutive prime numbers where the differences between the primes are strictly ascending.
Do the same for sequences of primes where the differences are strictly descending.
In both cases, show the sequence for primes < 1,000,000.
If there... | #Ruby | Ruby | require "prime"
limit = 1_000_000
puts "First found longest run of ascending prime gaps up to #{limit}:"
p Prime.each(limit).each_cons(2).chunk_while{|(i1,i2), (j1,j2)| j1-i1 < j2-i2 }.max_by(&:size).flatten.uniq
puts "\nFirst found longest run of descending prime gaps up to #{limit}:"
p Prime.each(limit).each_con... |
http://rosettacode.org/wiki/Consecutive_primes_with_ascending_or_descending_differences | Consecutive primes with ascending or descending differences | Task
Find and display here on this page, the longest sequence of consecutive prime numbers where the differences between the primes are strictly ascending.
Do the same for sequences of primes where the differences are strictly descending.
In both cases, show the sequence for primes < 1,000,000.
If there... | #Rust | Rust | // [dependencies]
// primal = "0.3"
fn print_diffs(vec: &[usize]) {
for i in 0..vec.len() {
if i > 0 {
print!(" ({}) ", vec[i] - vec[i - 1]);
}
print!("{}", vec[i]);
}
println!();
}
fn main() {
let limit = 1000000;
let mut asc = Vec::new();
let mut desc = ... |
http://rosettacode.org/wiki/Consecutive_primes_with_ascending_or_descending_differences | Consecutive primes with ascending or descending differences | Task
Find and display here on this page, the longest sequence of consecutive prime numbers where the differences between the primes are strictly ascending.
Do the same for sequences of primes where the differences are strictly descending.
In both cases, show the sequence for primes < 1,000,000.
If there... | #Sidef | Sidef | func runs(f, arr) {
var run = 0
var diff = 0
var diffs = []
arr.each_cons(2, {|p1,p2|
var curr_diff = (p2 - p1)
f(curr_diff, diff) ? ++run : (run = 1)
diff = curr_diff
diffs << run
})
var max = diffs.max
var runs = []
diffs.indices_by { _ == max }... |
http://rosettacode.org/wiki/Continued_fraction | Continued fraction | continued fraction
Mathworld
a
0
+
b
1
a
1
+
b
2
a
2
+
b
3
a
3
+
⋱
{\displaystyle a_{0}+{\cfrac {b_{1}}{a_{1}+{\cfrac {b_{2}}{a_{2}+{\cfrac {b_{3}}{a_{3}+\ddots }}}}}}}
The task is to write a program which generates su... | #Erlang | Erlang |
-module(continued).
-compile([export_all]).
pi_a (0) -> 3;
pi_a (_N) -> 6.
pi_b (N) ->
(2*N-1)*(2*N-1).
sqrt2_a (0) ->
1;
sqrt2_a (_N) ->
2.
sqrt2_b (_N) ->
1.
nappier_a (0) ->
2;
nappier_a (N) ->
N.
nappier_b (1) ->
1;
nappier_b (N) ->
N-1.
continued_fraction(FA,_FB,0) -... |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #Harbour | Harbour | cSource := "Hello World"
cDestination := cSource |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #Haskell | Haskell | src = "Hello World"
dst = src |
http://rosettacode.org/wiki/Constrained_random_points_on_a_circle | Constrained random points on a circle | Task
Generate 100 <x,y> coordinate pairs such that x and y are integers sampled from the uniform distribution with the condition that
10
≤
x
2
+
y
2
≤
15
{\displaystyle 10\leq {\sqrt {x^{2}+y^{2}}}\leq 15}
.
Then display/plot them. The outcome should be a "fuzzy" circle. The actual number of point... | #C | C | #include <stdio.h>
#include <stdlib.h>
inline
int randn(int m)
{
int rand_max = RAND_MAX - (RAND_MAX % m);
int r;
while ((r = rand()) > rand_max);
return r / (rand_max / m);
}
int main()
{
int i, x, y, r2;
unsigned long buf[31] = {0}; /* could just use 2d array */
for (i = 0; i < 100; ) {
x = randn(31) -... |
http://rosettacode.org/wiki/Convex_hull | Convex hull | Find the points which form a convex hull from a set of arbitrary two dimensional points.
For example, given the points (16,3), (12,17), (0,6), (-4,-6), (16,6), (16,-7), (16,-3), (17,-4), (5,19), (19,-8), (3,16), (12,13), (3,-4), (17,5), (-3,15), (-3,-9), (0,11), (-9,-3), (-4,-2) and (12,10) the convex hull would be (-... | #Common_Lisp | Common Lisp | #!/bin/sh
#|-*- mode:lisp -*-|#
#|
exec ros -Q -- $0 "$@"
|#
(progn ;;init forms
(ros:ensure-asdf)
#+quicklisp(ql:quickload '() :silent t)
)
(defpackage :ros.script.convex-hull-task.3861520611
(:use :cl))
(in-package :ros.script.convex-hull-task.3861520611)
;;;
;;; Convex hulls by Andrew's monotone chain al... |
http://rosettacode.org/wiki/Convert_seconds_to_compound_duration | Convert seconds to compound duration | Task
Write a function or program which:
takes a positive integer representing a duration in seconds as input (e.g., 100), and
returns a string which shows the same duration decomposed into:
weeks,
days,
hours,
minutes, and
seconds.
This is detailed below (e.g., "2 hr, 59 sec").
Demonstrat... | #Factor | Factor | USING: assocs io kernel math math.parser qw sequences
sequences.generalizations ;
: mod/ ( x y -- w z ) /mod swap ;
: convert ( n -- seq )
60 mod/ 60 mod/ 24 mod/ 7 mod/ 5 narray reverse ;
: .time ( n -- )
convert [ number>string ] map qw{ wk d hr min sec } zip
[ first "0" = ] reject [ " " join ] map ... |
http://rosettacode.org/wiki/Consecutive_primes_with_ascending_or_descending_differences | Consecutive primes with ascending or descending differences | Task
Find and display here on this page, the longest sequence of consecutive prime numbers where the differences between the primes are strictly ascending.
Do the same for sequences of primes where the differences are strictly descending.
In both cases, show the sequence for primes < 1,000,000.
If there... | #Wren | Wren | import "/math" for Int
var LIMIT = 999999
var primes = Int.primeSieve(LIMIT)
var longestSeq = Fn.new { |dir|
var pd = 0
var longSeqs = [[2]]
var currSeq = [2]
for (i in 1...primes.count) {
var d = primes[i] - primes[i-1]
if ((dir == "ascending" && d <= pd) || (dir == "descending" && ... |
http://rosettacode.org/wiki/Continued_fraction | Continued fraction | continued fraction
Mathworld
a
0
+
b
1
a
1
+
b
2
a
2
+
b
3
a
3
+
⋱
{\displaystyle a_{0}+{\cfrac {b_{1}}{a_{1}+{\cfrac {b_{2}}{a_{2}+{\cfrac {b_{3}}{a_{3}+\ddots }}}}}}}
The task is to write a program which generates su... | #F.23 | F# |
// I provide four functions:-
// cf2S general purpose continued fraction to sequence of float approximations
// cN2S Normal continued fractions (a-series always 1)
// cfSqRt uses cf2S to calculate sqrt of float
// π takes a sequence of b values returning the next until the list is exhausted after which it injects in... |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #HicEst | HicEst | src = "Hello World"
dst = src |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #i | i | //Strings are immutable in 'i'.
software {
a = "Hello World"
b = a //This copies the string.
a += "s"
print(a)
print(b)
}
|
http://rosettacode.org/wiki/Constrained_random_points_on_a_circle | Constrained random points on a circle | Task
Generate 100 <x,y> coordinate pairs such that x and y are integers sampled from the uniform distribution with the condition that
10
≤
x
2
+
y
2
≤
15
{\displaystyle 10\leq {\sqrt {x^{2}+y^{2}}}\leq 15}
.
Then display/plot them. The outcome should be a "fuzzy" circle. The actual number of point... | #C.23 | C# | using System;
using System.Diagnostics;
using System.Drawing;
namespace RosettaConstrainedRandomCircle
{
class Program
{
static void Main(string[] args)
{
var points = new Point[404];
int i = 0;
for (int y = -15; y <= 15; y++)
for (int x = -1... |
http://rosettacode.org/wiki/Convex_hull | Convex hull | Find the points which form a convex hull from a set of arbitrary two dimensional points.
For example, given the points (16,3), (12,17), (0,6), (-4,-6), (16,6), (16,-7), (16,-3), (17,-4), (5,19), (19,-8), (3,16), (12,13), (3,-4), (17,5), (-3,15), (-3,-9), (0,11), (-9,-3), (-4,-2) and (12,10) the convex hull would be (-... | #D | D | import std.algorithm.sorting;
import std.stdio;
struct Point {
int x;
int y;
int opCmp(Point rhs) {
if (x < rhs.x) return -1;
if (rhs.x < x) return 1;
return 0;
}
void toString(scope void delegate(const(char)[]) sink) const {
import std.format;
sink("(")... |
http://rosettacode.org/wiki/Convert_seconds_to_compound_duration | Convert seconds to compound duration | Task
Write a function or program which:
takes a positive integer representing a duration in seconds as input (e.g., 100), and
returns a string which shows the same duration decomposed into:
weeks,
days,
hours,
minutes, and
seconds.
This is detailed below (e.g., "2 hr, 59 sec").
Demonstrat... | #Forth | Forth | CREATE C 0 ,
: ., C @ IF ." , " THEN 1 C ! ;
: .TIME ( n --)
[ 60 60 24 7 * * * ]L /MOD ?DUP-IF ., . ." wk" THEN
[ 60 60 24 * * ]L /MOD ?DUP-IF ., . ." d" THEN
[ 60 60 * ]L /MOD ?DUP-IF ., . ." hr" THEN
[ 60 ]L /MOD ?DUP-IF ., . ." min" THEN
?D... |
http://rosettacode.org/wiki/Consecutive_primes_with_ascending_or_descending_differences | Consecutive primes with ascending or descending differences | Task
Find and display here on this page, the longest sequence of consecutive prime numbers where the differences between the primes are strictly ascending.
Do the same for sequences of primes where the differences are strictly descending.
In both cases, show the sequence for primes < 1,000,000.
If there... | #XPL0 | XPL0 | func IsPrime(N); \Return 'true' if N > 2 is a prime number
int N, I;
[if (N&1) = 0 \even number\ then return false;
for I:= 3 to sqrt(N) do
[if rem(N/I) = 0 then return false;
I:= I+1;
];
return true;
];
proc ShowSeq(Dir, Str); \Show longest sequence of distances between primes
int Dir, Str;
int ... |
http://rosettacode.org/wiki/Composite_numbers_k_with_no_single_digit_factors_whose_factors_are_all_substrings_of_k | Composite numbers k with no single digit factors whose factors are all substrings of k | Find the composite numbers k in base 10, that have no single digit prime factors and whose prime factors are all a substring of k.
Task
Find and show here, on this page, the first ten elements of the sequence.
Stretch
Find and show the next ten elements.
| #ALGOL_68 | ALGOL 68 | BEGIN # find composite k with no single digit factors whose factors are all substrings of k #
# returns TRUE if the string representation of f is a substring of k str, FALSE otherwise #
PROC is substring = ( STRING k str, INT f )BOOL:
BEGIN
STRING f str = whole( f, 0 );
INT ... |
http://rosettacode.org/wiki/Continued_fraction | Continued fraction | continued fraction
Mathworld
a
0
+
b
1
a
1
+
b
2
a
2
+
b
3
a
3
+
⋱
{\displaystyle a_{0}+{\cfrac {b_{1}}{a_{1}+{\cfrac {b_{2}}{a_{2}+{\cfrac {b_{3}}{a_{3}+\ddots }}}}}}}
The task is to write a program which generates su... | #Factor | Factor | USING: arrays combinators io kernel locals math math.functions
math.ranges prettyprint sequences ;
IN: rosetta.cfrac
! Every continued fraction must implement these two words.
GENERIC: cfrac-a ( n cfrac -- a )
GENERIC: cfrac-b ( n cfrac -- b )
! square root of 2
SINGLETON: sqrt2
M: sqrt2 cfrac-a
! If n is 1, ... |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #Icon_and_Unicon | Icon and Unicon | procedure main()
a := "qwerty"
b := a
b[2+:4] := "uarterl"
write(a," -> ",b)
end |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #J | J | src =: 'hello'
dest =: src |
http://rosettacode.org/wiki/Constrained_random_points_on_a_circle | Constrained random points on a circle | Task
Generate 100 <x,y> coordinate pairs such that x and y are integers sampled from the uniform distribution with the condition that
10
≤
x
2
+
y
2
≤
15
{\displaystyle 10\leq {\sqrt {x^{2}+y^{2}}}\leq 15}
.
Then display/plot them. The outcome should be a "fuzzy" circle. The actual number of point... | #C.2B.2B | C++ |
#include <windows.h>
#include <list>
#include <iostream>
//--------------------------------------------------------------------------------------------------
using namespace std;
//--------------------------------------------------------------------------------------------------
class point
{
public:
int x, y... |
http://rosettacode.org/wiki/Convex_hull | Convex hull | Find the points which form a convex hull from a set of arbitrary two dimensional points.
For example, given the points (16,3), (12,17), (0,6), (-4,-6), (16,6), (16,-7), (16,-3), (17,-4), (5,19), (19,-8), (3,16), (12,13), (3,-4), (17,5), (-3,15), (-3,-9), (0,11), (-9,-3), (-4,-2) and (12,10) the convex hull would be (-... | #Delphi | Delphi |
program ConvexHulls;
{$APPTYPE CONSOLE}
{$R *.res}
uses
System.Types,
System.SysUtils,
System.Generics.Defaults,
System.Generics.Collections;
function Ccw(const a, b, c: TPoint): Boolean;
begin
Result := ((b.X - a.X) * (c.Y - a.Y)) > ((b.Y - a.Y) * (c.X - a.X));
end;
function ConvexHull(... |
http://rosettacode.org/wiki/Convert_seconds_to_compound_duration | Convert seconds to compound duration | Task
Write a function or program which:
takes a positive integer representing a duration in seconds as input (e.g., 100), and
returns a string which shows the same duration decomposed into:
weeks,
days,
hours,
minutes, and
seconds.
This is detailed below (e.g., "2 hr, 59 sec").
Demonstrat... | #Fortran | Fortran |
SUBROUTINE PROUST(T) !Remembrance of time passed.
INTEGER T !The time, in seconds. Positive only, please.
INTEGER NTYPES !How many types of time?
PARAMETER (NTYPES = 5) !This should do.
INTEGER USIZE(NTYPES) !Size of the time unit.
CHARACTER*3 UNAME(NTYPES)!Name of the time ... |
http://rosettacode.org/wiki/Composite_numbers_k_with_no_single_digit_factors_whose_factors_are_all_substrings_of_k | Composite numbers k with no single digit factors whose factors are all substrings of k | Find the composite numbers k in base 10, that have no single digit prime factors and whose prime factors are all a substring of k.
Task
Find and show here, on this page, the first ten elements of the sequence.
Stretch
Find and show the next ten elements.
| #Arturo | Arturo | valid?: function [n][
pf: factors.prime n
every? pf 'f ->
and? [contains? to :string n to :string f]
[1 <> size digits f]
]
cnt: 0
i: new 3
while [cnt < 10][
if and? [not? prime? i][valid? i][
print i
cnt: cnt + 1
]
'i + 2
] |
http://rosettacode.org/wiki/Composite_numbers_k_with_no_single_digit_factors_whose_factors_are_all_substrings_of_k | Composite numbers k with no single digit factors whose factors are all substrings of k | Find the composite numbers k in base 10, that have no single digit prime factors and whose prime factors are all a substring of k.
Task
Find and show here, on this page, the first ten elements of the sequence.
Stretch
Find and show the next ten elements.
| #F.23 | F# |
// Composite numbers k with no single digit factors whose factors are all substrings of k. Nigel Galloway: January 28th., 2022
let fG n g=let rec fN i g e l=match i<g,g=0L,i%10L=g%10L with (true,_,_)->false |(_,true,_)->true |(_,_,true)->fN(i/10L)(g/10L) e l |_->fN l e e (l/10L) in fN n g g (n/10L)
let fN(g:int64)=O... |
http://rosettacode.org/wiki/Continued_fraction | Continued fraction | continued fraction
Mathworld
a
0
+
b
1
a
1
+
b
2
a
2
+
b
3
a
3
+
⋱
{\displaystyle a_{0}+{\cfrac {b_{1}}{a_{1}+{\cfrac {b_{2}}{a_{2}+{\cfrac {b_{3}}{a_{3}+\ddots }}}}}}}
The task is to write a program which generates su... | #Felix | Felix | fun pi (n:int) : (double*double) =>
let a = match n with | 0 => 3.0 | _ => 6.0 endmatch in
let b = pow(2.0 * n.double - 1.0, 2.0) in
(a,b);
fun sqrt_2 (n:int) : (double*double) =>
let a = match n with | 0 => 1.0 | _ => 2.0 endmatch in
let b = 1.0 in
(a,b);
fun napier (n:int) : (double*doubl... |
http://rosettacode.org/wiki/Continued_fraction | Continued fraction | continued fraction
Mathworld
a
0
+
b
1
a
1
+
b
2
a
2
+
b
3
a
3
+
⋱
{\displaystyle a_{0}+{\cfrac {b_{1}}{a_{1}+{\cfrac {b_{2}}{a_{2}+{\cfrac {b_{3}}{a_{3}+\ddots }}}}}}}
The task is to write a program which generates su... | #Forth | Forth | : fsqrt2 1 s>f 0> if 2 s>f else fdup then ;
: fnapier dup dup 1 > if 1- else drop 1 then s>f dup 1 < if drop 2 then s>f ;
: fpi dup 2* 1- dup * s>f 0> if 6 else 3 then s>f ;
( n -- f1 f2)
: cont.fraction ( xt n -- f)
1 swap 1+ 0 s>f \ ... |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #Java | Java | String src = "Hello";
String newAlias = src;
String strCopy = new String(src);
//"newAlias == src" is true
//"strCopy == src" is false
//"strCopy.equals(src)" is true |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #JavaScript | JavaScript | var container = {myString: "Hello"};
var containerCopy = container; // Now both identifiers refer to the same object
containerCopy.myString = "Goodbye"; // container.myString will also return "Goodbye" |
http://rosettacode.org/wiki/Constrained_random_points_on_a_circle | Constrained random points on a circle | Task
Generate 100 <x,y> coordinate pairs such that x and y are integers sampled from the uniform distribution with the condition that
10
≤
x
2
+
y
2
≤
15
{\displaystyle 10\leq {\sqrt {x^{2}+y^{2}}}\leq 15}
.
Then display/plot them. The outcome should be a "fuzzy" circle. The actual number of point... | #Clojure | Clojure | (ns rosettacode.circle-random-points
(:import [java.awt Color Graphics Dimension]
[javax.swing JFrame JPanel]))
(let [points (->> (for [x (range -15 16), y (range -15 16)
:when (<= 10 (Math/hypot x y) 15)]
[(+ x 15) (+ y 15)])
shuffle
(take 100))]
(doto (JFrame.)
(.add (doto (proxy... |
http://rosettacode.org/wiki/Convex_hull | Convex hull | Find the points which form a convex hull from a set of arbitrary two dimensional points.
For example, given the points (16,3), (12,17), (0,6), (-4,-6), (16,6), (16,-7), (16,-3), (17,-4), (5,19), (19,-8), (3,16), (12,13), (3,-4), (17,5), (-3,15), (-3,-9), (0,11), (-9,-3), (-4,-2) and (12,10) the convex hull would be (-... | #F.23 | F# | open System
type Point =
struct
val X : int
val Y : int
new (x : int, y : int ) = {X = x; Y = y}
end
let (poly : Point list) = [ Point(16, 3); Point(12, 17); Point( 0, 6); Point(-4, -6); Point(16, 6);
Point(16, -7); Point(16, -3); Point(17, -4); Point( ... |
http://rosettacode.org/wiki/Convert_seconds_to_compound_duration | Convert seconds to compound duration | Task
Write a function or program which:
takes a positive integer representing a duration in seconds as input (e.g., 100), and
returns a string which shows the same duration decomposed into:
weeks,
days,
hours,
minutes, and
seconds.
This is detailed below (e.g., "2 hr, 59 sec").
Demonstrat... | #FreeBASIC | FreeBASIC | 'FreeBASIC version 1.05 32/64 bit
Sub Show(m As Long)
Dim As Long c(1 To 5)={604800,86400,3600,60,1}
Dim As String g(1 To 5)={" Wk"," d"," hr"," min"," sec"},comma
Dim As Long b(1 To 5),flag,m2=m
Redim As Long s(0)
For n As Long=1 To 5
If m>=c(n) Then
Do
Redim P... |
http://rosettacode.org/wiki/Composite_numbers_k_with_no_single_digit_factors_whose_factors_are_all_substrings_of_k | Composite numbers k with no single digit factors whose factors are all substrings of k | Find the composite numbers k in base 10, that have no single digit prime factors and whose prime factors are all a substring of k.
Task
Find and show here, on this page, the first ten elements of the sequence.
Stretch
Find and show the next ten elements.
| #Go | Go | package main
import (
"fmt"
"rcu"
"strconv"
"strings"
)
func main() {
count := 0
k := 11 * 11
var res []int
for count < 20 {
if k%3 == 0 || k%5 == 0 || k%7 == 0 {
k += 2
continue
}
factors := rcu.PrimeFactors(k)
if len(factors) ... |
http://rosettacode.org/wiki/Composite_numbers_k_with_no_single_digit_factors_whose_factors_are_all_substrings_of_k | Composite numbers k with no single digit factors whose factors are all substrings of k | Find the composite numbers k in base 10, that have no single digit prime factors and whose prime factors are all a substring of k.
Task
Find and show here, on this page, the first ten elements of the sequence.
Stretch
Find and show the next ten elements.
| #J | J | */2 3 5 7
210
#1+I.0=+/|:4 q:1+i.210
48 |
http://rosettacode.org/wiki/Continued_fraction | Continued fraction | continued fraction
Mathworld
a
0
+
b
1
a
1
+
b
2
a
2
+
b
3
a
3
+
⋱
{\displaystyle a_{0}+{\cfrac {b_{1}}{a_{1}+{\cfrac {b_{2}}{a_{2}+{\cfrac {b_{3}}{a_{3}+\ddots }}}}}}}
The task is to write a program which generates su... | #Fortran | Fortran | module continued_fractions
implicit none
integer, parameter :: long = selected_real_kind(7,99)
type continued_fraction
integer :: a0, b1
procedure(series), pointer, nopass :: a, b
end type
interface
pure function series (n)
integer, intent(in) :: n
inte... |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #Joy | Joy | "hello" dup |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #jq | jq | def demo:
"abc" as $s # assignment of a string to a variable
| $s as $t # $t points to the same string as $s
| "def" as $s # This $s shadows the previous $s
| $t # $t still points to "abc"
;
demo
|
http://rosettacode.org/wiki/Constrained_random_points_on_a_circle | Constrained random points on a circle | Task
Generate 100 <x,y> coordinate pairs such that x and y are integers sampled from the uniform distribution with the condition that
10
≤
x
2
+
y
2
≤
15
{\displaystyle 10\leq {\sqrt {x^{2}+y^{2}}}\leq 15}
.
Then display/plot them. The outcome should be a "fuzzy" circle. The actual number of point... | #COBOL | COBOL |
identification division.
program-id. circle.
environment division.
input-output section.
file-control.
select plot-file assign "circle.txt".
data division.
file section.
fd plot-file report plot.
working-storage section.
1 binary.
... |
http://rosettacode.org/wiki/Convex_hull | Convex hull | Find the points which form a convex hull from a set of arbitrary two dimensional points.
For example, given the points (16,3), (12,17), (0,6), (-4,-6), (16,6), (16,-7), (16,-3), (17,-4), (5,19), (19,-8), (3,16), (12,13), (3,-4), (17,5), (-3,15), (-3,-9), (0,11), (-9,-3), (-4,-2) and (12,10) the convex hull would be (-... | #Fortran | Fortran | module convex_hulls
!
! Convex hulls by Andrew's monotone chain algorithm.
!
! For a description of the algorithm, see
! https://en.wikibooks.org/w/index.php?title=Algorithm_Implementation/Geometry/Convex_hull/Monotone_chain&stableid=40169
!
! For brevity in the task, I shall use the built-in "complex" ty... |
http://rosettacode.org/wiki/Convert_seconds_to_compound_duration | Convert seconds to compound duration | Task
Write a function or program which:
takes a positive integer representing a duration in seconds as input (e.g., 100), and
returns a string which shows the same duration decomposed into:
weeks,
days,
hours,
minutes, and
seconds.
This is detailed below (e.g., "2 hr, 59 sec").
Demonstrat... | #Frink | Frink |
wk := week
n = eval[input["Enter duration in seconds: "]]
res = n s -> [0, "wk", "d", "hr", "min", "sec", 0]
res =~ %s/, 0[^,]+//g
println[res]
|
http://rosettacode.org/wiki/Composite_numbers_k_with_no_single_digit_factors_whose_factors_are_all_substrings_of_k | Composite numbers k with no single digit factors whose factors are all substrings of k | Find the composite numbers k in base 10, that have no single digit prime factors and whose prime factors are all a substring of k.
Task
Find and show here, on this page, the first ten elements of the sequence.
Stretch
Find and show the next ten elements.
| #Julia | Julia | using Lazy
using Primes
function containsitsonlytwodigfactors(n)
s = string(n)
return !isprime(n) && all(t -> length(t) > 1 && contains(s, t), map(string, collect(keys(factor(n)))))
end
seq = @>> Lazy.range(2) filter(containsitsonlytwodigfactors)
foreach(p -> print(lpad(last(p), 9), first(p) == 10 ? "\n" ... |
http://rosettacode.org/wiki/Composite_numbers_k_with_no_single_digit_factors_whose_factors_are_all_substrings_of_k | Composite numbers k with no single digit factors whose factors are all substrings of k | Find the composite numbers k in base 10, that have no single digit prime factors and whose prime factors are all a substring of k.
Task
Find and show here, on this page, the first ten elements of the sequence.
Stretch
Find and show the next ten elements.
| #Mathematica.2FWolfram_Language | Mathematica/Wolfram Language | ClearAll[CompositeAndContainsPrimeFactor]
CompositeAndContainsPrimeFactor[k_Integer] := Module[{id, pf},
If[CompositeQ[k],
pf = FactorInteger[k][[All, 1]];
If[AllTrue[pf, GreaterThan[10]],
id = IntegerDigits[k];
AllTrue[pf, SequenceCount[id, IntegerDigits[#]] > 0 &]
,
False
]
,
False
... |
http://rosettacode.org/wiki/Composite_numbers_k_with_no_single_digit_factors_whose_factors_are_all_substrings_of_k | Composite numbers k with no single digit factors whose factors are all substrings of k | Find the composite numbers k in base 10, that have no single digit prime factors and whose prime factors are all a substring of k.
Task
Find and show here, on this page, the first ten elements of the sequence.
Stretch
Find and show the next ten elements.
| #Pascal | Pascal | program FacOfInt;
// gets factors of consecutive integers fast
// limited to 1.2e11
{$IFDEF FPC}
{$MODE DELPHI} {$OPTIMIZATION ON,ALL} {$COPERATORS ON}
{$ELSE}
{$APPTYPE CONSOLE}
{$ENDIF}
uses
sysutils,
strutils //Numb2USA
{$IFDEF WINDOWS},Windows{$ENDIF}
;
//################################################... |
http://rosettacode.org/wiki/Continued_fraction | Continued fraction | continued fraction
Mathworld
a
0
+
b
1
a
1
+
b
2
a
2
+
b
3
a
3
+
⋱
{\displaystyle a_{0}+{\cfrac {b_{1}}{a_{1}+{\cfrac {b_{2}}{a_{2}+{\cfrac {b_{3}}{a_{3}+\ddots }}}}}}}
The task is to write a program which generates su... | #FreeBASIC | FreeBASIC | #define MAX 70000
function sqrt2_a( n as uinteger ) as uinteger
return iif(n,2,1)
end function
function sqrt2_b( n as uinteger ) as uinteger
return 1
end function
function napi_a( n as uinteger ) as uinteger
return iif(n,n,2)
end function
function napi_b( n as uinteger ) as uinteger
return iif(n>1... |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #Julia | Julia |
s = "Rosetta Code"
t = s
println("s = \"", s, "\" and, after \"t = s\", t = \"", t, "\"")
s = "Julia at "*s
println("s = \"", s, "\" and, after this change, t = \"", t, "\"")
|
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #KonsolScript | KonsolScript | Var:String str1 = "Hello";
Var:String str2 = str1; |
http://rosettacode.org/wiki/Constrained_random_points_on_a_circle | Constrained random points on a circle | Task
Generate 100 <x,y> coordinate pairs such that x and y are integers sampled from the uniform distribution with the condition that
10
≤
x
2
+
y
2
≤
15
{\displaystyle 10\leq {\sqrt {x^{2}+y^{2}}}\leq 15}
.
Then display/plot them. The outcome should be a "fuzzy" circle. The actual number of point... | #CoffeeScript | CoffeeScript |
NUM_POINTS = 100
MIN_R = 10
MAX_R = 15
random_circle_points = ->
rand_point = ->
Math.floor (Math.random() * (MAX_R * 2 + 1) - MAX_R)
points = {}
cnt = 0
while cnt < 100
x = rand_point()
y = rand_point()
continue unless MIN_R * MIN_R <= x*x + y*y <= MAX_R * MAX_R
points["#{x},#{y}"] = ... |
http://rosettacode.org/wiki/Convex_hull | Convex hull | Find the points which form a convex hull from a set of arbitrary two dimensional points.
For example, given the points (16,3), (12,17), (0,6), (-4,-6), (16,6), (16,-7), (16,-3), (17,-4), (5,19), (19,-8), (3,16), (12,13), (3,-4), (17,5), (-3,15), (-3,-9), (0,11), (-9,-3), (-4,-2) and (12,10) the convex hull would be (-... | #FreeBASIC | FreeBASIC |
#include "crt.bi"
Screen 20
Window (-20,-20)-(30,30)
Type Point
As Single x,y
As Long done
End Type
#macro rotate(pivot,p,a,scale)
Type<Point>(scale*(Cos(a*.0174533)*(p.x-pivot.x)-Sin(a*.0174533)*(p.y-pivot.y))+pivot.x, _
scale*(Sin(a*.0174533)*(p.x-pivot.x)+Cos(a*.0174533)*(p.y-pivot.y))+pivot.y)
#endmac... |
http://rosettacode.org/wiki/Convert_seconds_to_compound_duration | Convert seconds to compound duration | Task
Write a function or program which:
takes a positive integer representing a duration in seconds as input (e.g., 100), and
returns a string which shows the same duration decomposed into:
weeks,
days,
hours,
minutes, and
seconds.
This is detailed below (e.g., "2 hr, 59 sec").
Demonstrat... | #Gambas | Gambas | Public Sub Main()
Dim iInput As Integer[] = [7259, 86400, 6000000] 'Input details
Dim iChecks As Integer[] = [604800, 86400, 3600, 60] 'Weeks, days, hours, mins in seconds
Dim iTime As New Integer[5] 'To ... |
http://rosettacode.org/wiki/Composite_numbers_k_with_no_single_digit_factors_whose_factors_are_all_substrings_of_k | Composite numbers k with no single digit factors whose factors are all substrings of k | Find the composite numbers k in base 10, that have no single digit prime factors and whose prime factors are all a substring of k.
Task
Find and show here, on this page, the first ten elements of the sequence.
Stretch
Find and show the next ten elements.
| #Perl | Perl | use strict;
use warnings;
use ntheory qw<is_prime factor gcd>;
my($values,$cnt);
LOOP: for (my $k = 11; $k < 1E10; $k += 2) {
next if 1 < gcd($k,2*3*5*7) or is_prime $k;
map { next if index($k, $_) < 0 } factor $k;
$values .= sprintf "%10d", $k;
last LOOP if ++$cnt == 20;
}
print $values =~ s/.{1,100... |
http://rosettacode.org/wiki/Composite_numbers_k_with_no_single_digit_factors_whose_factors_are_all_substrings_of_k | Composite numbers k with no single digit factors whose factors are all substrings of k | Find the composite numbers k in base 10, that have no single digit prime factors and whose prime factors are all a substring of k.
Task
Find and show here, on this page, the first ten elements of the sequence.
Stretch
Find and show the next ten elements.
| #Phix | Phix | with javascript_semantics
integer count = 0, n = 11*11,
limit = iff(platform()=JS?10:20)
atom t0 = time(), t1 = time()
while count<limit do
if gcd(n,3*5*7)=1 then
sequence f = prime_factors(n,true,-1)
if length(f)>1 then
string s = sprintf("%d",n)
bool valid = true
... |
http://rosettacode.org/wiki/Continued_fraction | Continued fraction | continued fraction
Mathworld
a
0
+
b
1
a
1
+
b
2
a
2
+
b
3
a
3
+
⋱
{\displaystyle a_{0}+{\cfrac {b_{1}}{a_{1}+{\cfrac {b_{2}}{a_{2}+{\cfrac {b_{3}}{a_{3}+\ddots }}}}}}}
The task is to write a program which generates su... | #F.C5.8Drmul.C3.A6 | Fōrmulæ | package main
import "fmt"
type cfTerm struct {
a, b int
}
// follows subscript convention of mathworld and WP where there is no b(0).
// cf[0].b is unused in this representation.
type cf []cfTerm
func cfSqrt2(nTerms int) cf {
f := make(cf, nTerms)
for n := range f {
f[n] = cfTerm{2, 1}
}... |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #Kotlin | Kotlin | val s = "Hello"
val alias = s // alias === s
val copy = "" + s // copy !== s |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #LabVIEW | LabVIEW | 'hello dup |
http://rosettacode.org/wiki/Constrained_random_points_on_a_circle | Constrained random points on a circle | Task
Generate 100 <x,y> coordinate pairs such that x and y are integers sampled from the uniform distribution with the condition that
10
≤
x
2
+
y
2
≤
15
{\displaystyle 10\leq {\sqrt {x^{2}+y^{2}}}\leq 15}
.
Then display/plot them. The outcome should be a "fuzzy" circle. The actual number of point... | #Common_Lisp | Common Lisp | (flet ((good-p (x y) (<= 100 (+ (* x x) (* y y)) 255)))
(loop with x with y with cnt = 0
with scr = (loop repeat 31 collect (loop repeat 31 collect " "))
while (< cnt 100)
do (when (good-p (- (setf x (random 31)) 15)
(- (setf y (random 31)) 15))
(setf (elt (elt scr y) x) "@ ")
(incf cnt))
finally... |
http://rosettacode.org/wiki/Convex_hull | Convex hull | Find the points which form a convex hull from a set of arbitrary two dimensional points.
For example, given the points (16,3), (12,17), (0,6), (-4,-6), (16,6), (16,-7), (16,-3), (17,-4), (5,19), (19,-8), (3,16), (12,13), (3,-4), (17,5), (-3,15), (-3,-9), (0,11), (-9,-3), (-4,-2) and (12,10) the convex hull would be (-... | #Go | Go | package main
import (
"fmt"
"image"
"sort"
)
// ConvexHull returns the set of points that define the
// convex hull of p in CCW order starting from the left most.
func (p points) ConvexHull() points {
// From https://en.wikibooks.org/wiki/Algorithm_Implementation/Geometry/Convex_hull/Monotone_chain
// with o... |
http://rosettacode.org/wiki/Convert_seconds_to_compound_duration | Convert seconds to compound duration | Task
Write a function or program which:
takes a positive integer representing a duration in seconds as input (e.g., 100), and
returns a string which shows the same duration decomposed into:
weeks,
days,
hours,
minutes, and
seconds.
This is detailed below (e.g., "2 hr, 59 sec").
Demonstrat... | #Go | Go | package main
import "fmt"
func main(){
fmt.Println(TimeStr(7259))
fmt.Println(TimeStr(86400))
fmt.Println(TimeStr(6000000))
}
func TimeStr(sec int)(res string){
wks, sec := sec / 604800,sec % 604800
ds, sec := sec / 86400, sec % 86400
hrs, sec := sec / 3600, sec % 3600
mins, sec := sec / 60, sec % 60
Comm... |
http://rosettacode.org/wiki/Composite_numbers_k_with_no_single_digit_factors_whose_factors_are_all_substrings_of_k | Composite numbers k with no single digit factors whose factors are all substrings of k | Find the composite numbers k in base 10, that have no single digit prime factors and whose prime factors are all a substring of k.
Task
Find and show here, on this page, the first ten elements of the sequence.
Stretch
Find and show the next ten elements.
| #Raku | Raku | use Prime::Factor;
use Lingua::EN::Numbers;
put (2..∞).hyper(:5000batch).map( {
next if (1 < $_ gcd 210) || .is-prime || any .&prime-factors.map: -> $n { !.contains: $n };
$_
} )[^20].batch(10)».&comma».fmt("%10s").join: "\n"; |
http://rosettacode.org/wiki/Composite_numbers_k_with_no_single_digit_factors_whose_factors_are_all_substrings_of_k | Composite numbers k with no single digit factors whose factors are all substrings of k | Find the composite numbers k in base 10, that have no single digit prime factors and whose prime factors are all a substring of k.
Task
Find and show here, on this page, the first ten elements of the sequence.
Stretch
Find and show the next ten elements.
| #Sidef | Sidef | var e = Enumerator({|f|
var c = (9.primorial)
var a = (1..c -> grep { .is_coprime(c) })
loop {
var n = a.shift
a.push(n + c)
n.is_composite || next
f(n) if n.factor.all {|p| Str(n).contains(p) }
}
})
var count = 10
e.each {|n|
say n
break if (--count <... |
http://rosettacode.org/wiki/Continued_fraction | Continued fraction | continued fraction
Mathworld
a
0
+
b
1
a
1
+
b
2
a
2
+
b
3
a
3
+
⋱
{\displaystyle a_{0}+{\cfrac {b_{1}}{a_{1}+{\cfrac {b_{2}}{a_{2}+{\cfrac {b_{3}}{a_{3}+\ddots }}}}}}}
The task is to write a program which generates su... | #Go | Go | package main
import "fmt"
type cfTerm struct {
a, b int
}
// follows subscript convention of mathworld and WP where there is no b(0).
// cf[0].b is unused in this representation.
type cf []cfTerm
func cfSqrt2(nTerms int) cf {
f := make(cf, nTerms)
for n := range f {
f[n] = cfTerm{2, 1}
}... |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #Lang5 | Lang5 | 'hello dup |
http://rosettacode.org/wiki/Copy_a_string | Copy a string | This task is about copying a string.
Task
Where it is relevant, distinguish between copying the contents of a string
versus making an additional reference to an existing string.
Other tasks related to string operations:
Metrics
Array length
String length
Copy a string
Empty string (assignment)
Counting
W... | #Lasso | Lasso | local(x = 'I saw a rhino!')
local(y = #x)
#x //I saw a rhino!
'\r'
#y //I saw a rhino!
'\r\r'
#x = 'I saw one too'
#x //I saw one too
'\r'
#y //I saw a rhino!
'\r\r'
#y = 'it was grey.'
#x //I saw one too
'\r'
#y //it was grey. |
http://rosettacode.org/wiki/Constrained_random_points_on_a_circle | Constrained random points on a circle | Task
Generate 100 <x,y> coordinate pairs such that x and y are integers sampled from the uniform distribution with the condition that
10
≤
x
2
+
y
2
≤
15
{\displaystyle 10\leq {\sqrt {x^{2}+y^{2}}}\leq 15}
.
Then display/plot them. The outcome should be a "fuzzy" circle. The actual number of point... | #D | D | import std.stdio, std.random, std.math, std.complex;
void main() {
char[31][31] table = ' ';
foreach (immutable _; 0 .. 100) {
int x, y;
do {
x = uniform(-15, 16);
y = uniform(-15, 16);
} while(abs(12.5 - complex(x, y).abs) > 2.5);
table[x + 15][y + 15... |
http://rosettacode.org/wiki/Convex_hull | Convex hull | Find the points which form a convex hull from a set of arbitrary two dimensional points.
For example, given the points (16,3), (12,17), (0,6), (-4,-6), (16,6), (16,-7), (16,-3), (17,-4), (5,19), (19,-8), (3,16), (12,13), (3,-4), (17,5), (-3,15), (-3,-9), (0,11), (-9,-3), (-4,-2) and (12,10) the convex hull would be (-... | #Groovy | Groovy | class ConvexHull {
private static class Point implements Comparable<Point> {
private int x, y
Point(int x, int y) {
this.x = x
this.y = y
}
@Override
int compareTo(Point o) {
return Integer.compare(x, o.x)
}
@Override
... |
Subsets and Splits
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Rosetta Code Task Comparisons
Identifies tasks common to both COBOL and Python languages that are described as having difficulty levels, revealing cross-language task similarities and providing useful comparative programming examples.
SQL Code Examples from Training Data
Retrieves raw SQL code examples for the SQL language, which is basic data retrieval without meaningful analysis or patterns.
SQL Code Examples from Training Data
Retrieves raw SQL code examples for the SQL language, which is basic filtering that shows what data looks like but doesn't provide meaningful analysis or patterns.
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Retrieves specific programming language names and codes from training data, providing basic filtering but limited analytical value beyond identifying these particular languages.