How can I map a javascript array to another one with different field names?

Question

I have a javascript variable with the following:

var qh = [{"i":1,"q":1},{"i":2,"q":2},{"i":167,"q":2192}]

I need to map this to another variable to make:

var qq = [{"i":1,"a":1},{"i":2,"a":2},{"i":167,"a":2192}]

You mean you want to duplicate the array? Or reference the variable like this qq = qh; — hitautodestruct
– hitautodestruct, Commented Nov 19, 2013 at 13:07
Also check this out: my.opera.com/GreyWyvern/blog/show.dml/1725165 — hitautodestruct
– hitautodestruct, Commented Nov 19, 2013 at 13:14

net.uk.sweet · Accepted Answer · 2013-11-19 13:27:28Z

1

Using the native map function you can do it like this:

var qq = qh.map(function(el) { return { i: el.i, a: el.q } });

If you need support for older browsers, check out the underscore version which will use the native version of the function if available and polyfill it if not.

If you need support for older browsers AND you don't want to include an additional library, you'll have to do the donkey work yourself in a loop:

var qq = [];
for (var i = 0, obj; i < qh.length; i ++) {
    obj = qh[i];
    qq.push({ 'i': obj.i, 'a': obj.q });
}

edited Nov 19, 2013 at 13:27

answered Nov 19, 2013 at 13:05

net.uk.sweet

12.4k3 gold badges26 silver badges42 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How can I map a javascript array to another one with different field names?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related