JavaScript: Move the specified amount of elements to the end of the array

JavaScript fundamental (ES6 Syntax): Exercise-94 with Solution

Move Array Elements to End

Write a JavaScript program to move the specified amount of elements to the end of the array.

• Use Array.prototype.slice() twice to get the elements after the specified index and the elements before that.
• Use the spread operator (...) to combine the two into one array.
• If offset is negative, the elements will be moved from end to start.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2
// Define the 'offset' function to offset the elements of an array by a specified amount.
const offset = (arr, offset) => [...arr.slice(offset), ...arr.slice(0, offset)];

// Offset the elements of the array by 2 positions to the right.
console.log(offset([1, 2, 3, 4, 5], 2)); // Output: [3, 4, 5, 1, 2]

// Offset the elements of the array by 2 positions to the left.
console.log(offset([1, 2, 3, 4, 5], -2)); // Output: [4, 5, 1, 2, 3]

Output:

[3,4,5,1,2]
[4,5,1,2,3]

Visual Presentation:

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-94-1 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript program that moves a specified number of elements from the beginning of an array to its end.
• Write a JavaScript function that shifts the first n elements of an array and appends them at the end, preserving order.
• Write a JavaScript program that rotates an array left by n positions and returns the modified array.

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