How to find the index of an element in an array in JavaScript
Use the indexOf() method to efficiently find the position of an element in a JavaScript array and get its index.
How to get the length of an array in JavaScript
Use the length property to get the number of elements in a JavaScript array with a simple and efficient approach.
How to empty an array in JavaScript
Set the length property to 0 to efficiently empty a JavaScript array while maintaining all existing references.
How to clone an array in JavaScript
Use the spread operator to create a shallow copy of a JavaScript array without mutating the original array.
How to merge two arrays in JavaScript
Use the spread operator to efficiently merge two JavaScript arrays into a single array with modern ES6 syntax.
How to check if an array contains a value in JavaScript
Use the includes() method to efficiently check if a JavaScript array contains a specific value with modern ES6 syntax.
How to remove a specific item from an array in JavaScript
Use splice() with indexOf() to efficiently remove a specific element from a JavaScript array by value or index.
How to remove the last item from an array in JavaScript
Use the pop() method to efficiently remove the last element from a JavaScript array and return the removed value.
How to remove the first item from an array in JavaScript
Use the shift() method to efficiently remove the first element from a JavaScript array and get the removed value back.
