JavaScript: Find all elements in a given array except for the first one

JavaScript fundamental (ES6 Syntax): Exercise-31 with Solution

All Elements Except First in Array

Write a JavaScript program to find all elements in a given array except the first one. Return the whole array if its length is 1.

• Return Array.prototype.slice(1) if Array.prototype.length is more than 1, otherwise, return the whole array.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
// Define a function named tail that returns all elements of an array except the first one.
const tail = arr => (arr.length > 1 ? arr.slice(1) : arr);

// Test the function with different input arrays.
console.log(tail([1, 2, 3])); // Output: [2, 3]
console.log(tail([1]));        // Output: [1] (unchanged because the array has only one element)

Output:

[2,3]
[1]

Visual Presentation:

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-1-31 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript program that returns a new array containing all elements except the first, using slicing.
• Write a JavaScript function that checks if an array’s length is 1 and returns it unchanged, otherwise returns elements from index 1 onward.
• Write a JavaScript program that utilizes array destructuring to remove the first element and output the rest.

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