I want to reverse a string in javascript without using inbuilt functions

Question

Input

var str = "ABC PQR XYZ";

var output = "ZYX RQP CBA";

https://stackoverflow.com/questions/33877226/reversing-words-in-a-string-js-without-using-built-in-function' — Ram, Aug 24 '17 at 15:52

score 3 · Accepted Answer · answered Aug 24 '17 at 15:49

3

function reverse(s) {
var o = '';
for (var i = s.length - 1; i >= 0; i--)
  o += s[i];
return o;
}

answered Aug 24 '17 at 15:49

bakaDev

I am getting my desired output. Thanks for the reply – VandanaRathi Aug 24 '17 at 16:50

score 2 · Answer 2 · answered Aug 24 '17 at 15:50

2

You can use reduce for that :

'ABC PQR XYZ'.split('').reduce((state, value) => {
    return value + state;
});

answered Aug 24 '17 at 15:50

Rosmarine Popcorn

Jonas Wilms · Answer 3 · 2017-08-24T15:55:49.037

0

Arrays can be reversed:

 let ouput = "ABC".split``.reverse().join``;

edited Aug 24 '17 at 15:55

answered Aug 24 '17 at 15:53

Jonas Wilms

1

Since you're using ES6, you can use the spread operator to avoid the split: [...'ABC PQR XYZ'].reverse().join`` – Rick Hitchcock Aug 24 '17 at 15:55
The instructions were to do it in place without using build in functions, though. But yes, split / reverse / join is the best solution if you're able to use all of the in-built tools. – Nmuta Jul 01 '21 at 11:20