JavaScript: Remove specified elements from the right of a given array of elements

JavaScript fundamental (ES6 Syntax): Exercise-19 with Solution

Remove Right Elements from Array

Write a JavaScript program to remove specified elements from the right of a given array of elements.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
// Define a function called `remove_from_right` that removes elements from the right side of an array.
function remove_from_right(arr, n = -1){
  return arr.slice(n); // Slice the array from index n to the end, where n defaults to -1
}

// Example usage
console.log(remove_from_right([1, 2, 3])); // [3]
console.log(remove_from_right([1, 2, 3], -1)); // [3]
console.log(remove_from_right([1, 2, 3], -2)); // [2, 3]
console.log(remove_from_right([1, 2, 3], -4)); // [1, 2, 3]

Output:

[3]
[3]
[2,3]
[1,2,3]

Visual Presentation:

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-1-19 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript program that removes elements from the end of an array until a specified condition becomes true.
• Write a JavaScript function that pops elements off an array while a predicate function returns false.
• Write a JavaScript program that returns the truncated array after removing trailing elements that meet a condition.

Improve this sample solution and post your code through Disqus

Previous: Write a JavaScript program to remove specified elements from the left of a given array of elements.
Next: Write a JavaScript program to extend a 3-digit color code to a 6-digit color code.