JavaScript String Object to String

Question

In node.js the next code

var Reverse = (function() {

    return {
        reverse1: function(s) {
            var out = new String();
            for (var i = s.length - 1, j = 0; i >= 0; i--, j++) {
                out[j] = s[i];
            }
            return out;
        }
    }
})();

console.log(Reverse.reverse1("this is text"));

prints

{ '0': 't',
  '1': 'x',
  '2': 'e',
  '3': 't',
  '4': ' ',
  '5': 's',
  '6': 'i',
  '7': ' ',
  '8': 's',
  '9': 'i',
  '10': 'h',
  '11': 't' 
}

But I want to print a string. I've tried return out.toString() but returns nothing.

Michael Berkowski · Accepted Answer · 2012-10-21 12:56:33Z

3

Unless you have a real serious reason to need this done by array index, why not just concatenate onto it?

out += s[i];

Will print:

// "txet si siht"

answered Oct 21, 2012 at 12:56

Michael Berkowski

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Comments

Kaustubh Karkare · Accepted Answer · 2012-10-21 12:57:59Z

1

var Reverse = (function() {
    return {
        reverse1: function(s) {
            var out = "";
            for (var i = s.length - 1, j = 0; i >= 0; i--, j++) out += s[i];
            return out;
        }
    };
})();
console.log(Reverse.reverse1("this is text"));

answered Oct 21, 2012 at 12:57

Kaustubh Karkare

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Comments

xdazz · Accepted Answer · 2012-10-21 12:59:49Z

1

Use join method of array.

 return out.join('');

And change var out = new String(); to var out = [];

And Note:

You could do the below to reverse a string:

var ret = "this is text".split('').reverse().join('');

edited Oct 21, 2012 at 12:59

answered Oct 21, 2012 at 12:54

xdazz

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2 Comments

xdazz Over a year ago

@enrmarc And change new String() to []

Marcos Over a year ago

Thanks, I know reverse and split but I have to use only pure code: cocode.co/index.php?qa=67&qa_1=reversing-strings

MagePal Extensions · Accepted Answer · 2012-10-21 14:01:06Z

1

var Reverse = (function() {

    return {
        reverse1: function(s) {
            out = '';
            for (var i = s.length - 1; i >= 0; i--) {
                out += s[i];
            }
            return out;
        }
    }
})();

console.log(Reverse.reverse1("this is text"));

answered Oct 21, 2012 at 14:01

MagePal Extensions

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