JavaScript: Get all the elements of an array except the last one
JavaScript fundamental (ES6 Syntax): Exercise-215 with Solution
Write a JavaScript program to get all the elements of an array except the last one.
- Use Array.prototype.slice(0, -1) to return all but the last element of the array.
Sample Solution:
JavaScript Code:
//#Source https://bit.ly/2neWfJ2
const initial = arr => arr.slice(0, -1);
console.log(initial([1, 2, 3]));
console.log(initial([0, -1, -2]));
Sample Output:
[1,2] [0,-1]
Pictorial Presentation:
Flowchart:

Live Demo:
See the Pen javascript-fundamental-exercise-215 by w3resource (@w3resource) on CodePen.
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Previous: Write a JavaScript program to initializes an array containing the numbers in the specified range (in reverse) where start and end are inclusive with their common difference step.
Next: Write a JavaScript program to get all indices of val in an array. If val never occurs, returns [].
What is the difficulty level of this exercise?
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JavaScript: Tips of the Day
How to check whether a string contains a substring in JavaScript?
ECMAScript 6 introduced String.prototype.includes:
const string = "foo"; const substring = "oo"; console.log(string.includes(substring));
includes doesn't have Internet Explorer support, though. In ECMAScript 5 or older environments, use String.prototype.indexOf, which returns -1 when a substring cannot be found:
var string = "foo"; var substring = "oo"; console.log(string.indexOf(substring) !== -1);
Ref: https://bit.ly/3fFFgZv
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