Please note, this is a STATIC archive of website www.w3resource.com from 19 Jul 2022, cach3.com does not collect or store any user information, there is no "phishing" involved.
w3resource

JavaScript: Reverse the elements of a given array of integers length 3

JavaScript Basic: Exercise-73 with Solution

Write a JavaScript program to reverse the elements of a given array of integers length 3.

Pictorial Presentation:

JavaScript: Reverse the elements of a given array of integers length 3.

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JavaScript program to reverse the elements of a given array of integers length 3.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function reverse3(array) {
    return array.map((element, idx, arr) => arr[(arr.length - 1) - idx]);
}

console.log(reverse3([5, 4, 3])); 
console.log(reverse3([1, 0, -1]));  
console.log(reverse3([2, 3, 1]));

Sample Output:

[3,4,5]
[-1,0,1]
[1,3,2]

Flowchart:

Flowchart: JavaScript - Reverse the elements of a given array of integers length 3

ES6 Version:

function reverse3(array) {
    return array.map((element, idx, arr) => arr[(arr.length - 1) - idx]);
}

console.log(reverse3([5, 4, 3])); 
console.log(reverse3([1, 0, -1]));  
console.log(reverse3([2, 3, 1]));

Live Demo:

See the Pen JavaScript - Reverse the elements of a given array of integers length 3 - basic-ex-73 by w3resource (@w3resource) on CodePen.


Contribute your code and comments through Disqus.

Previous: Write a JavaScript program to check if the first and last elements are equal of a given array of integers length 3.
Next: Write a JavaScript program to find the larger value between the first or last and set all the other elements with that value.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = [];
arr[0] = "Jani";
arr[1] = "Hege";
arr[2] = "Stale";
arr[3] = "Kai Jim";
arr[4] = "Borge";

console.log(arr.join());
arr.splice(2, 0, "Lene");
console.log(arr.join());

Ref: https://bit.ly/2BXbp04