reverse javascript code example

Example 1: javascript string reverse

"this is a test string".split("").reverse().join("");
//"gnirts tset a si siht"

// Or
const reverse = str => [...str].reverse().join('');

// Or
const reverse = str => str.split('').reduce((rev, char)=> `${char}${rev}`, '');

// Or
const reverse = str => (str === '') ? '' : `${reverse(str.substr(1))}${str.charAt(0)}`;

// Example
reverse('hello world');     // 'dlrow olleh'

Example 2: reversing an array in js

var arr=[1,2,5,6,2]
arr.reverse()

Example 3: javascript reverse array

var arr = [34, 234, 567, 4];
print(arr);
var new_arr = arr.reverse();
print(new_arr);

Example 4: js array reverse

[34, 234, 567, 4].reverse();

Example 5: how to reverse an array in javascript

array = [1 2, 3]
reversed = array.reverse()

Example 6: js reverse nested array

var reversed = array.map(function reverse(item) {
    return Array.isArray(item) && Array.isArray(item[0]) 
               ? item.map(reverse) 
               : item.reverse();
});