How to Remove the Last 2,3,4,N Elements from an Array in JavaScript

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In JavaScript, manipulating arrays is a common task, and there are various ways to remove the last 2, 3, 4, or N elements. This tutorial will explore simple methods to achieve this flexibility.

Method 1: Using splice()

The splice() method allows for precise modifications to an array by specifying the starting index and the number of elements to remove.

function removeLastNElementsWithSplice(arr, n) {
// Use splice to remove the last n elements
}

// Example usage:
let myArray = [1, 2, 3, 4, 5, 6, 7];
removeLastNElementsWithSplice(myArray, 3);

Method 2: Using array slicing

The slice() method is versatile and allows you to create a new array by specifying the range of elements to include.

function removeLastNElementsWithSlice(arr, n) {
// Create a new array without the last n elements
return newArray;
}

// Example usage:
let myArray = [1, 2, 3, 4, 5, 6, 7];
let newArray = removeLastNElementsWithSlice(myArray, 3);

Method 3: Using Loop with pop()

You can use a loop with the pop() method to iteratively remove the last N elements in place.

function removeLastNElementsWithPop(arr, n) {
// Remove the last N elements using pop() in a loop
for (let i = 0; i = n; i++) {
}
}

// Example usage:
let myArray = [1, 2, 3, 4, 5, 6, 7];
removeLastNElementsWithPop(myArray, 3);

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