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How to merge multiple documents in MongoDB?	To merge multiple documents in MongoDB, use aggregate(). Let us create a collection with documents − > db.demo436.insertOne( ... { ... "_id" : "101", ... "Name": "Chris", ... "details" : [ ... { ... "CountryName" : "US", ... "Age" : 21 ... } ... ], .....	[ { "code": null, "e": 1163, "s": 1062, "text": "To merge multiple documents in MongoDB, use aggregate(). Let us create a collection with documents −" }, { "code": null, "e": 2075, "s": 1163, "text": "> db.demo436.insertOne(\n... {\n... \"_id\" : \"101\",\n... \"Name...
How to find the functions inside a package in R?	There are so many packages in R and each of these packages have different objectives, thus, the number of functions in these packages are large enough to solve the problems in analysis. A package might have fifteen functions and the other might have hundred, it totally depends on the necessity. We can find the function...	[ { "code": null, "e": 1498, "s": 1062, "text": "There are so many packages in R and each of these packages have different objectives, thus, the number of functions in these packages are large enough to solve the problems in analysis. A package might have fifteen functions and the other might have hun...
crypto.generateKeyPairSync() Method in Node.js	The crypto.generateKeyPairSync() can be used to generate a new asymmetric key pair of the specified type in a sync flow. Supported types for generating key pair are: RSA, DSA, EC, Ed25519, Ed448, X25519, X448 and DH. The function behaves as if keyObject.export has been called on its result when a publicKeyEncoding or p...	[ { "code": null, "e": 1544, "s": 1062, "text": "The crypto.generateKeyPairSync() can be used to generate a new asymmetric key pair of the specified type in a sync flow. Supported types for generating key pair are: RSA, DSA, EC, Ed25519, Ed448, X25519, X448 and DH. The function behaves as if keyObject...
Group Shifted String - GeeksforGeeks	23 Jun, 2021 Given an array of strings (all lowercase letters), the task is to group them in such a way that all strings in a group are shifted versions of each other. Two string S and T are called shifted if, S.length = T.length and S[i] = T[i] + K for 1 <= i <= S.length for a constant integer K For example string...	[ { "code": null, "e": 25136, "s": 25108, "text": "\n23 Jun, 2021" }, { "code": null, "e": 25334, "s": 25136, "text": "Given an array of strings (all lowercase letters), the task is to group them in such a way that all strings in a group are shifted versions of each other. Two stri...
Add Titles to a Graph in R Programming - title() Function - GeeksforGeeks	20 Jul, 2020 title() function in R Language is used to add main title and axis title to a graph. This function can also be used to modify the existing titles. Syntax:title(main = NULL, sub = NULL, xlab = NULL, ylab = NULL, ...) Parameters:main: Main title of the graphsub: Defines subtitles Returns: Plot after title add...	[ { "code": null, "e": 24658, "s": 24630, "text": "\n20 Jul, 2020" }, { "code": null, "e": 24804, "s": 24658, "text": "title() function in R Language is used to add main title and axis title to a graph. This function can also be used to modify the existing titles." }, { "co...
Find minimum steps required to reach the end of a matrix in C++	Suppose we have a 2D matrix with positive integers. We have to find the minimum steps required to move from to the end of the matrix (rightmost bottom cell), If we are at cell (i, j), we can go to the cell (i, j+mat[i, j]) or (i+mat[i, j], j), We cannot cross the bounds. So if the matrix is like − The output will be 2....	[ { "code": null, "e": 1361, "s": 1062, "text": "Suppose we have a 2D matrix with positive integers. We have to find the minimum steps required to move from to the end of the matrix (rightmost bottom cell), If we are at cell (i, j), we can go to the cell (i, j+mat[i, j]) or (i+mat[i, j], j), We cannot...
How can I set a MySQL database to use MyISAM by default?	To set the default storage engine, use the following syntax − set @@default_storage_engine = ’yourEngineType’; Now implement the above syntax to set the default engine to MyISAM. The query is as follows − mysql> set @@default_storage_engine = 'MyISAM'; Query OK, 0 rows affected (0.05 sec) Now you can check the default ...	[ { "code": null, "e": 1124, "s": 1062, "text": "To set the default storage engine, use the following syntax −" }, { "code": null, "e": 1173, "s": 1124, "text": "set @@default_storage_engine = ’yourEngineType’;" }, { "code": null, "e": 1267, "s": 1173, "text": "...
Palindrome in both Decimal and Binary \| Practice \| GeeksforGeeks	Given a number N. check whether a given number N is palindrome or not in it's both formates (Decimal and Binary ). Example 1: Input: N = 7 Output: "Yes" Explanation: 7 is palindrome in it's decimal and also in it's binary (111).So answer is "Yes". Example 2: Input: N = 12 Output: "No" Explanation: 12 is not palind...	[ { "code": null, "e": 354, "s": 226, "text": "Given a number N. check whether a given number N is palindrome or not in it's both formates (Decimal and Binary ).\n\nExample 1:" }, { "code": null, "e": 479, "s": 354, "text": "Input: N = 7\nOutput: \"Yes\" \nExplanation: 7 is palind...
DAX Filter - HASONEVALUE function	Returns TRUE when the context for columnName has been filtered down to one distinct value only. Otherwise, returns FALSE. HASONEVALUE (<columnName>) columnName The name of a column. It cannot be an expression. TRUE or FALSE. = HASONEVALUE (Sales[Product]) 53 Lectures 5.5 hours Abhay Gadiya 24 Lect...	[ { "code": null, "e": 2123, "s": 2001, "text": "Returns TRUE when the context for columnName has been filtered down to one distinct value only. Otherwise, returns FALSE." }, { "code": null, "e": 2152, "s": 2123, "text": "HASONEVALUE (<columnName>) \n" }, { "code": null, ...
Reinforcement Learning in Python with Flappy Bird \| by Anthony Li \| Towards Data Science	In 2014 the sleeper hit Flappy Bird took the mobile gaming world by storm. It has since been implemented in PyGame but most interestingly it lends itself well to reinforcement learning. The agent (bird) can only perform 2 actions (flap or do nothing) and is only interested in 1 environmental variable (the upcoming pipe...	[ { "code": null, "e": 608, "s": 172, "text": "In 2014 the sleeper hit Flappy Bird took the mobile gaming world by storm. It has since been implemented in PyGame but most interestingly it lends itself well to reinforcement learning. The agent (bird) can only perform 2 actions (flap or do nothing) and ...
How to use Null Coalescing Operator (??) in C#?	The null coalescing operator is used with the nullable value types and reference types. It is used for converting an operand to the type of another nullable (or not) value type operand, where an implicit conversion is possible. If the value of the first operand is null, then the operator returns the value of the second...	[ { "code": null, "e": 1290, "s": 1062, "text": "The null coalescing operator is used with the nullable value types and reference types. It is used for converting an operand to the type of another nullable (or not) value type operand, where an implicit conversion is possible." }, { "code": nul...
Python - Delete rows/columns from DataFrame using Pandas.drop()	Pandas is one of the most popular python library for data analysis and data wrangling. In this article we will see how we can create a pandas dataframe and then delete some selective rows ort columns from this data frame. In the below example we have the iris.csv file which is read into a data frame. We first have a lo...	[ { "code": null, "e": 1284, "s": 1062, "text": "Pandas is one of the most popular python library for data analysis and data wrangling. In this article we will see how we can create a pandas dataframe and then delete some selective rows ort columns from this data frame." }, { "code": null, ...
Deploy Machine Learning App built using Streamlit and PyCaret on Google Kubernetes Engine \| by Moez Ali \| Towards Data Science	In our last post on deploying a machine learning pipeline in the cloud, we demonstrated how to develop a machine learning pipeline in PyCaret and deploy a trained model on Heroku PaaS as a web application built using a Streamlit open-source framework. If you haven’t heard about PyCaret before, you can read this announc...	[ { "code": null, "e": 513, "s": 172, "text": "In our last post on deploying a machine learning pipeline in the cloud, we demonstrated how to develop a machine learning pipeline in PyCaret and deploy a trained model on Heroku PaaS as a web application built using a Streamlit open-source framework. If ...
How to Check Mentioned File Exists or not using JavaScript/jQuery ?	03 Aug, 2021 Sometimes we want to upload a file through the path of the file, but few times the file does not exist. In that case, we have to respond to users the given path does not find any file or does not exist in the mentioned file. Approach 1: Use ajax() method of jQuery to check if a file exists on a given URL o...	[ { "code": null, "e": 28, "s": 0, "text": "\n03 Aug, 2021" }, { "code": null, "e": 253, "s": 28, "text": "Sometimes we want to upload a file through the path of the file, but few times the file does not exist. In that case, we have to respond to users the given path does not find ...
Python – Modulo of tuple elements	27 Dec, 2019 Sometimes, while working with records, we can have a problem in which we may need to perform modulo of tuples. This problem can occur in day-day programming. Let’s discuss certain ways in which this task can be performed. Method #1 : Using zip() + generator expressionThe combination of above functions can ...	[ { "code": null, "e": 28, "s": 0, "text": "\n27 Dec, 2019" }, { "code": null, "e": 250, "s": 28, "text": "Sometimes, while working with records, we can have a problem in which we may need to perform modulo of tuples. This problem can occur in day-day programming. Let’s discuss cer...
Kadane's Algorithm \| Practice \| GeeksforGeeks	Given an array Arr[] of N integers. Find the contiguous sub-array(containing at least one number) which has the maximum sum and return its sum. Example 1: Input: N = 5 Arr[] = {1,2,3,-2,5} Output: 9 Explanation: Max subarray sum is 9 of elements (1, 2, 3, -2, 5) which is a contiguous subarray. Example 2: Input: N = ...	[ { "code": null, "e": 382, "s": 238, "text": "Given an array Arr[] of N integers. Find the contiguous sub-array(containing at least one number) which has the maximum sum and return its sum." }, { "code": null, "e": 394, "s": 382, "text": "\nExample 1:" }, { "code": null, ...
Count of elements which are not at the correct position	28 Jun, 2022 Given an array arr[] of N elements and the task is to count the number of elements from this array which are not at the correct position. An element is said to be in an incorrect position if its position changes in the array when the array is sorted.Examples: Input: arr[] = {1, 2, 6, 2, 4, 5} Output: 4 A...	[ { "code": null, "e": 28, "s": 0, "text": "\n28 Jun, 2022" }, { "code": null, "e": 290, "s": 28, "text": "Given an array arr[] of N elements and the task is to count the number of elements from this array which are not at the correct position. An element is said to be in an incorr...
Implementation of Particle Swarm Optimization	31 Aug, 2021 Previous article Particle Swarm Optimization – An Overview talked about inspiration of particle swarm optimization (PSO) , it’s mathematical modelling and algorithm. In this article we will implement particle swarm optimization (PSO) for two fitness functions 1) Rastrigin function 2) Sphere function. T...	[ { "code": null, "e": 28, "s": 0, "text": "\n31 Aug, 2021" }, { "code": null, "e": 470, "s": 28, "text": "Previous article Particle Swarm Optimization – An Overview talked about inspiration of particle swarm optimization (PSO) , it’s mathematical modelling and algorithm. In this a...
How to open a website in Android’s web browser from any application?	This example demonstrates how do I open a website in Android’s web browser from any application. Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. Step 2 − Add the following code to res/layout/activity_main.xml. <?xml version="1.0" encoding=...	[ { "code": null, "e": 1284, "s": 1187, "text": "This example demonstrates how do I open a website in Android’s web browser from any application." }, { "code": null, "e": 1413, "s": 1284, "text": "Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill al...
Closest Pair of Points \| O(nlogn) Implementation	25 Jun, 2022 We are given an array of n points in the plane, and the problem is to find out the closest pair of points in the array. This problem arises in a number of applications. For example, in air-traffic control, you may want to monitor planes that come too close together, since this may indicate a possible colli...	[ { "code": null, "e": 52, "s": 24, "text": "\n25 Jun, 2022" }, { "code": null, "e": 2014, "s": 52, "text": "We are given an array of n points in the plane, and the problem is to find out the closest pair of points in the array. This problem arises in a number of applications. For ...
Sudoku \| Backtracking-7	17 Jun, 2022 Given a partially filled 9×9 2D array ‘grid[9][9]’, the goal is to assign digits (from 1 to 9) to the empty cells so that every row, column, and subgrid of size 3×3 contains exactly one instance of the digits from 1 to 9. Example: Input: grid = { {3, 0, 6, 5, 0, 8, 4, 0, 0}, {5, 2, 0, 0, 0, 0, ...	[ { "code": null, "e": 52, "s": 24, "text": "\n17 Jun, 2022" }, { "code": null, "e": 275, "s": 52, "text": "Given a partially filled 9×9 2D array ‘grid[9][9]’, the goal is to assign digits (from 1 to 9) to the empty cells so that every row, column, and subgrid of size 3×3 contains ...
How to convert Python date string mm/dd/yyyy to datetime?	You can convert a string to date object using the strptime function. Provide the date string and the format in which the date is specified. import datetime date_str = '29/12/2017' # The date - 29 Dec 2017 format_str = '%d/%m/%Y' # The format datetime_obj = datetime.datetime.strptime(date_str, format_str) print(datetim...	[ { "code": null, "e": 1328, "s": 1187, "text": "You can convert a string to date object using the strptime function. Provide the date string and the format in which the date is specified. " }, { "code": null, "e": 1521, "s": 1328, "text": "import datetime\ndate_str = '29/12/2017' ...
Python NLTK \| tokenize.regexp()	07 Jun, 2019 With the help of NLTK tokenize.regexp() module, we are able to extract the tokens from string by using regular expression with RegexpTokenizer() method. Syntax : tokenize.RegexpTokenizer()Return : Return array of tokens using regular expression Example #1 :In this example we are using RegexpTokenizer() met...	[ { "code": null, "e": 28, "s": 0, "text": "\n07 Jun, 2019" }, { "code": null, "e": 181, "s": 28, "text": "With the help of NLTK tokenize.regexp() module, we are able to extract the tokens from string by using regular expression with RegexpTokenizer() method." }, { "code": ...
Latches in Digital Logic	21 Jun, 2022 Latches are basic storage elements that operate with signal levels (rather than signal transitions). Latches controlled by a clock transition are flip-flops. Latches are level-sensitive devices. Latches are useful for the design of the asynchronous sequential circuit. Latches are sequential circuit with tw...	[ { "code": null, "e": 54, "s": 26, "text": "\n21 Jun, 2022" }, { "code": null, "e": 532, "s": 54, "text": "Latches are basic storage elements that operate with signal levels (rather than signal transitions). Latches controlled by a clock transition are flip-flops. Latches are leve...
Console.SetWindowPosition() Method in C#	14 Mar, 2019 Console.SetWindowPosition(Int32, Int32) Method in C# is used to set the position of the console window relative to the screen buffer. Syntax: public static void SetWindowposition(int left, int top); Parameters:left: It is the column position of the upper left corner of the console window.top: It is the row...	[ { "code": null, "e": 53, "s": 25, "text": "\n14 Mar, 2019" }, { "code": null, "e": 187, "s": 53, "text": "Console.SetWindowPosition(Int32, Int32) Method in C# is used to set the position of the console window relative to the screen buffer." }, { "code": null, "e": 252...
Google Online Challenge for Summer Internship 2021	01 Oct, 2020 The Google online challenge 2020 for summer internships 2021 was held on Sept 26. It was a 60-minute online test having 2 questions to code. First Question: You are given an array A with N integers. you are required to answer Q queries of the following types. Determine the count of distinct prime numbers w...	[ { "code": null, "e": 54, "s": 26, "text": "\n01 Oct, 2020" }, { "code": null, "e": 195, "s": 54, "text": "The Google online challenge 2020 for summer internships 2021 was held on Sept 26. It was a 60-minute online test having 2 questions to code." }, { "code": null, "...
How to Include *.so Library in Android Studio?	16 Jun, 2021 The SO file stands for Shared Library. You compile all C++ code into the.SO file when you write it in C or C++. The SO file is a shared object library that may be dynamically loaded during Android runtime. Library files are larger, often ranging from 2MB to 10MB in size. As a result, the app becomes bloate...	[ { "code": null, "e": 54, "s": 26, "text": "\n16 Jun, 2021" }, { "code": null, "e": 770, "s": 54, "text": "The SO file stands for Shared Library. You compile all C++ code into the.SO file when you write it in C or C++. The SO file is a shared object library that may be dynamically...
Number of rectangles in a circle of radius R	16 Jul, 2021 Given a circular sheet of radius R and the task is to find the total number of rectangles with integral length and width that can be cut from the circular sheet, one at a time. Examples: Input: R = 2 Output: 8 8 rectangles can be cut from a circular sheet of radius 2. These are: 1×1, 1×2, 2×1, 2×2, 1×3, ...	[ { "code": null, "e": 54, "s": 26, "text": "\n16 Jul, 2021" }, { "code": null, "e": 243, "s": 54, "text": "Given a circular sheet of radius R and the task is to find the total number of rectangles with integral length and width that can be cut from the circular sheet, one at a tim...
Sum of all substrings of a string representing a number \| Set 1	08 Jul, 2022 Given an integer represented as a string, we need to get the sum of all possible substrings of this string. Examples: Input : num = “1234” Output : 1670 Sum = 1 + 2 + 3 + 4 + 12 + 23 + 34 + 123 + 234 + 1234 = 1670 Input : num = “421” Output : 491 Sum = 4 + 2 + 1 + 42 + 21 + 421 = 491 We ca...	[ { "code": null, "e": 54, "s": 26, "text": "\n08 Jul, 2022" }, { "code": null, "e": 162, "s": 54, "text": "Given an integer represented as a string, we need to get the sum of all possible substrings of this string." }, { "code": null, "e": 174, "s": 162, "text"...
Keras - Permute Layers	Permute is also used to change the shape of the input using pattern. For example, if Permute with argument (2, 1) is applied to layer having input shape as (batch_size, 3, 2), then the output shape of the layer will be (batch_size, 2, 3) Permute has one argument as follows − keras.layers.Permute(dims) A simple example...	[ { "code": null, "e": 2289, "s": 2051, "text": "Permute is also used to change the shape of the input using pattern. For example, if Permute with argument (2, 1) is applied to layer having input shape as (batch_size, 3, 2), then the output shape of the layer will be (batch_size, 2, 3)" }, { "...
Understanding the Structure of Matplotlib \| by Soner Yıldırım \| Towards Data Science	Matplotlib is a widely used python data visualization library. It provides many different kinds of 2D and 3D plots that are very useful for data analysis and machine learning tasks. Matplotlib offers flexibility. There are multiple ways to create plots. In order to master matplotlib, it is necessary to have a thorough ...	[ { "code": null, "e": 354, "s": 172, "text": "Matplotlib is a widely used python data visualization library. It provides many different kinds of 2D and 3D plots that are very useful for data analysis and machine learning tasks." }, { "code": null, "e": 524, "s": 354, "text": "Matp...
Matplotlib Tutorial - GeeksforGeeks	07 Jul, 2021 Matplotlib is easy to use and an amazing visualizing library in Python. It is built on NumPy arrays and designed to work with the broader SciPy stack and consists of several plots like line, bar, scatter, histogram, etc. In this article, we will learn about Python plotting with Matplotlib from basics to a...	[ { "code": null, "e": 29935, "s": 29907, "text": "\n07 Jul, 2021" }, { "code": null, "e": 30157, "s": 29935, "text": "Matplotlib is easy to use and an amazing visualizing library in Python. It is built on NumPy arrays and designed to work with the broader SciPy stack and consists ...
What is the importance of jmod format in Java 9?	Java 9 has introduced a new format called "jmod" to encapsulate modules. The jmod files can be designed to handle more content types than jar files. It can also package local codes, configuration files, local commands, and other types of data. The "jmod" format hasn't support at runtime and can be based on zip format c...	[ { "code": null, "e": 1578, "s": 1062, "text": "Java 9 has introduced a new format called \"jmod\" to encapsulate modules. The jmod files can be designed to handle more content types than jar files. It can also package local codes, configuration files, local commands, and other types of data. The \"j...
PySpark for Data Science Workflows \| by Ben Weber \| Towards Data Science	Demonstrated experience in PySpark is one of the most desirable competencies that employers are looking for when building data science teams, because it enables these teams to own live data products. While I’ve previously blogged about PySpark, Parallelization, and UDFs, I wanted to provide a proper overview of this to...	[ { "code": null, "e": 801, "s": 171, "text": "Demonstrated experience in PySpark is one of the most desirable competencies that employers are looking for when building data science teams, because it enables these teams to own live data products. While I’ve previously blogged about PySpark, Paralleliz...
C Program for Muller Method	We are given with a function f(x) on a floating number x and we can have three initial guesses for the root of the function. The task is to find the root of the function where f(x) can be any algebraic or transcendental function. What is Muller Method? Muller method was first presented by David E. Muller in 1956. A Mul...	[ { "code": null, "e": 1292, "s": 1062, "text": "We are given with a function f(x) on a floating number x and we can have three initial guesses for the root of the function. The task is to find the root of the function where f(x) can be any algebraic or transcendental function." }, { "code": n...
Java public Keyword	❮ Java Keywords Second accesses a public Main class with public attributes: /* Code from filename: Main.java public class Main { public String fname = "John"; public String lname = "Doe"; public String email = "john@doe.com"; public int age = 24; } */ class Second { public static void main(String[] args) {...	[ { "code": null, "e": 18, "s": 0, "text": "\n❮ Java Keywords\n" }, { "code": null, "e": 79, "s": 18, "text": "Second accesses a public \nMain class with public attributes:" }, { "code": null, "e": 520, "s": 79, "text": "/* Code from filename: Main.java\npublic ...
Building Custom Callbacks with Keras and TensorFlow 2 \| by B. Chen \| Towards Data Science	Callbacks are an important type of object in Keras and TensorFlow. They are designed to be able to monitor the model performance in metrics at certain points in the training run and perform some actions that might depend on those performances in metric values. Keras has provided a number of built-in callbacks, for exam...	[ { "code": null, "e": 433, "s": 172, "text": "Callbacks are an important type of object in Keras and TensorFlow. They are designed to be able to monitor the model performance in metrics at certain points in the training run and perform some actions that might depend on those performances in metric va...
JavaScript \| async function expression	08 Oct, 2021 Async function expression is used to define an async function inside an expression in JavaScript. The async function is declared using the async keyword. Syntax: async function [function_name]([param1[, param2[, ..., paramN]]]) { // Statements } Parameters: function_name: This parameter holds the f...	[ { "code": null, "e": 28, "s": 0, "text": "\n08 Oct, 2021" }, { "code": null, "e": 192, "s": 28, "text": "Async function expression is used to define an async function inside an expression in JavaScript. The async function is declared using the async keyword. Syntax: " }, { ...
Maximize the profit after selling the tickets	28 Jun, 2022 Given array seats[] where seat[i] is the number of vacant seats in the ith row in a stadium for a cricket match. There are N people in a queue waiting to buy the tickets. Each seat costs equal to the number of vacant seats in the row it belongs to. The task is to maximize the profit by selling the tickets ...	[ { "code": null, "e": 54, "s": 26, "text": "\n28 Jun, 2022" }, { "code": null, "e": 374, "s": 54, "text": "Given array seats[] where seat[i] is the number of vacant seats in the ith row in a stadium for a cricket match. There are N people in a queue waiting to buy the tickets. Eac...
Check if a pair with given product exists in Linked list	04 Apr, 2022 Given a linked list, and a product K. The task is to check if there exist two numbers in the linked list whose product is equal to the given number K. If there exist two numbers, print them. If there are multiple answers, print any of them. Examples: Input : List = 1 -> 2 -> 3 -> 4 -> 5 -> NULL ...	[ { "code": null, "e": 53, "s": 25, "text": "\n04 Apr, 2022" }, { "code": null, "e": 294, "s": 53, "text": "Given a linked list, and a product K. The task is to check if there exist two numbers in the linked list whose product is equal to the given number K. If there exist two numb...