Using replace() with regular expressions

Question

Here's the string:

var myString = "apple, 0.90, pear, 1.23, orange, 1.90";

What regular expression do I use to change the string to this:

apple: 0.90, pear: 1.23, orange: 1.90

I want to replace the comma after the end of the fruit to a colon.

You need to show us what you've tried before we can tell you why it was wrong. — TankorSmash
– TankorSmash, Commented Sep 21, 2015 at 20:24
not sure, but I thought I would leave this helpful tidbit here: regexr.com — Shockwave
– Shockwave, Commented Sep 21, 2015 at 20:24
please, post here some regex code you have tried and not working. Normally this community use to teach to fish, instead of give the fish — Rodrigo Gomes
– Rodrigo Gomes, Commented Sep 21, 2015 at 20:25
Please refer to this link for some idea : stackoverflow.com/questions/3720012/… — Ruchi
– Ruchi, Commented Sep 21, 2015 at 20:26
You should be more resourceful. I gave you an answer and also a second option to show that there's multiple ways to do things. Learn how to not give up so quickly. The javascript MDN has helped me understand a lot of things, so I'd recommend that as a resource — Jabari King
– Jabari King, Commented Sep 21, 2015 at 20:37

kecal909 · Accepted Answer · 2015-09-29 20:22:42Z

0

You can split the string into an array and then make new string. Like this:

var myString = "apple, 0.90, pear, 1.23, orange, 1.90";

var array = myString.split(', ');
var output = '';
for (var i = 0; i < array.length; i += 2) {
    output += array[i] + ': ' + array[i + 1];
    output += (i - 2 == array.length) ? '' : ', ';
}

edited Sep 29, 2015 at 20:22

answered Sep 21, 2015 at 20:33

kecal909

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1 Comment

jfriend00 Over a year ago

Eeek no. A one line of simple .replace() will entirely solve this problem, but we are encouraging the OP to try for themselves before handing them a solution.

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