Javascript Sort() Array In Numeric Order

Question

I have array like this

var Arr = [ 'h78em', 'w145px', 'w13px' ]

I want to sort this array in Numerical Order

[ 'w13px', 'h78em', 'w145px' ]

For Regular Numerical sorting I use this function

var sortArr = Arr.sort(function(a,b){
     return a-b;
});

But due to word character in the array this function doesn't work

Is it possible to sort this array ? How do I split/match array ?

"78em", "145px" : those are different units. Why this sort ? Do you want it independently of the unit or should em to pixel conversion occurs ? — Denys Séguret
– Denys Séguret, Commented Aug 30, 2012 at 7:59

VisioN · Accepted Answer · 2012-08-30 09:34:58Z

8

You can use regular expression to remove all letters when sorting:

var Arr = [ 'h78em', 'w145px', 'w13px' ];
var sortArr = Arr.sort(function(a, b) {
    a = a.replace(/[a-z]/g, "");  // or use .replace(/\D/g, "");
    b = b.replace(/[a-z]/g, "");  // to leave the digits only
    return a - b;
});

DEMO: http://jsfiddle.net/8RNKE/

edited Aug 30, 2012 at 9:34

answered Aug 30, 2012 at 7:56

VisioN

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2 Comments

sQVe Over a year ago

I would add i so it doesn't only check for lowercase, making it safer.

VisioN Over a year ago

@sQVe Good catch. There is also an option to leave only digits using /[\D]/g. However, it depends on the input.

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