How to merge two arrays and remove duplicates from the array in JavaScript?

Learn how to use the concat() array method and Set() constructor function to merge two arrays and remove duplicates from the array in JavaScript

How to remove empty elements from an array in JavaScript?

Learn how to use the filter() array method or a for loop to remove empty, null, or undefined elements from an array in JavaScript

How to remove duplicate or repeated elements from an array in JavaScript?

Learn how to use the Set() constructor function and the spread operator (...) to remove duplicate or repeated elements from an array in JavaScript

How to check if a variable is an Array in JavaScript?

Learn how to use the Array.isArray() method, constructor property in the variable, or the instanceof operator to check if a variable is an Array in JavaScript

How to copy a portion of an array in JavaScript?

Learn how to use the slice() array method to copy a portion of an array in JavaScript

How to fill an array with a specific value in JavaScript?

Learn how to use the fill() array method to fill an array with a specific value in JavaScript

How to empty the contents in an array in JavaScript?

Learn various ways to empty the contents in an array in JavaScript

How to check if a key or property exists in an object in JavaScript?

Learn how to use the 'in' operator to check if a key or property exists in an object in JavaScript

How to add items to the end of the array in JavaScript?

Learn how to use the push() array method to add items to the end of the array in JavaScript

How to insert an item into an array at a specific index in JavaScript?

Learn how to use the splice() array method to insert an item into an array at a specific index in JavaScript

How to find and remove a specific item from an array in JavaScript?

Learn how to use the indexOf() and the splice() array methods to find and remove a specific item from an array in JavaScript

How to remove an element at a specific position or index from an array in JavaScript?

Learn how to use the splice() array method to remove an element at a specific position or index from an array in JavaScript

How to get the index or position of a specific element in an array in JavaScript?

Learn how to use the indexOf() array method to get the index or position of a specific element in an array in JavaScript

How to create a MD5 hash in Node.js?

Learn how to use the crypto module to create a MD5 hash in Node.js

How to create a SHA-256 hash in Node.js?

Learn how to use the crypto module to create a SHA-256 hash in Node.js

How to convert a string representation of an integer number to number type in JavaScript?

Learn how to use the parseInt() function to convert a string representation of an integer number to number type in JavaScript