Question

I have an array

var data = new Array("1111_3", "1231_54", "1143_76", "1758_12");

now I want to parse data[0] to get 1111.

var ids = new Array();
// example: ids = Array("1111", "1231", "1143", "1758");

and copy all ids from data to ids Array.

is it possible to do it like in php or do i need to use loops?

Thanks.

Answer 1

elegance:

data.map(function(x){
    return x.split('_')[0];
})

This IS part of the ECMA-262 standard.

But, if you care about supporting old outdated sub-par browsers, use jQuery (or whatever other framework you are using; almost all of them define a custom map function):

$.map(data, function(x){
    return x.split('_')[0];
})