2d array to associative array using underscore's _.map

Question

I'm trying to map 2d array:

var fkOptionList2d = [[3, 'Orange'],[5, 'Banana'],[6, 'Coconut']]

to an associative array:

var fkOptionList1d = [{id: 1, label: 'Orange'},{id: 2, label: 'Banana'},{id: 3, label: 'Coconut'}]

but I'm new to underscore.js and don't quite get it yet. Should it be something like:

fkTableArr1d = _.object(_.map(fkTableArr2d, function(item, id) {
   return [{"id: " + id,"label: " + item}]
}));

?

Have actually you tried running anything? Your final bit of code should give you something close — Bojangles
– Bojangles, Commented Oct 29, 2013 at 10:47
good to know :) but I get Unexpected identifier near return — van_folmert
– van_folmert, Commented Oct 29, 2013 at 10:48
It should be return [{ id: id, label: item }]; you don't need to construct the object as a string (it's not JSON) — Bojangles
– Bojangles, Commented Oct 29, 2013 at 10:49

Satpal · Accepted Answer · 2013-10-29 11:02:30Z

1

As per my understanding you need to use

return [{
    "id " : id, "label " : item
}]

instead of

return [{"id: " + id,"label: " + item}]

You are returning invalid JSON from the function

Additionally you don't need _.object method

fkTableArr1d = _.map(fkTableArr2d, function(item, id) {
      return [{
        "id " : id, "label " : item
        }];
    });

DEMO

edited Oct 29, 2013 at 11:02

answered Oct 29, 2013 at 10:49

Satpal

134k13 gold badges168 silver badges171 bronze badges

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

6 Comments

van_folmert Over a year ago

I've changed it, but console.log shows Object {[object Object]: undefined}

Satpal Over a year ago

@OverdrivenFall, Can you create a fiddle

Satpal Over a year ago

@OverdrivenFall, see demo jsfiddle.net/W67Zr/2. you don't need _.object method. I have also updated answer

van_folmert Over a year ago

it works, but label becomes an array, according to console.log(fkTableArr1d[0][0]); : Object {id : 0, label : Array[2]}, shouldn't it be a string? `

van_folmert Over a year ago

ok, I got it, from the 3 of function(list, iterator, context) I actually wanted list[0] which is ID and list[1] - name

|

Collectives™ on Stack Overflow

2d array to associative array using underscore's _.map

1 Answer 1

DEMO

6 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

6 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related