Pick value based on key on object

Question

var fields = {
    100: 'Harry',
    200: 'Zack'
};

var required = 200;

How can I get the output of Zack? I know there is a utility in lodash but not quite sure how to use it.

Is your real situation more complicated than this? Lodash isn't necessary, just plain javascript should work: fields[required] — Dustin Hodges, Dec 20 '16 at 20:46
I suggest you go back and review a basic JS tutorial, which will help you understand how to access a property on an object. You could start [here](https://developer.mozilla.org/en-US/docs/Web/JavaScript/A_re-introduction_to_JavaScript#Objects). — , Dec 20 '16 at 20:56

Abhinav Galodha · Answer 1 · 2016-12-20T20:48:56.770

1

You can make use of plain Javascript.

var result = fields["200"]

or

var result = fields[required]

The important thing to note is that Javascript properties are internally stored as string.

edited Dec 20 '16 at 20:48

answered Dec 20 '16 at 20:43

Abhinav Galodha

score 1 · Accepted Answer · answered Dec 20 '16 at 20:46

1

You could use get:

var result = _.get(fields, required);

answered Dec 20 '16 at 20:46

Gruff Bunny

And how is this different/better than `fields[required]`? – Dec 20 '16 at 20:48
1

OP asked about a Lodash solution. – Gruff Bunny Dec 20 '16 at 20:51
But he doesn't need lodash. – Dec 20 '16 at 20:53
The difference is `_.get(object, 'a.b.c', 'default')`, support for path and default value. But this is unnecessary complexity for the question asked, though it answers the question in terms of Lodash correctly. – Emile Bergeron Dec 20 '16 at 20:56
1

You don't need lodash for anything as you could write everything in plain javascript. I did not presume that he could do without lodash as it may be a requirement to use it e.g an assignment. – Gruff Bunny Dec 20 '16 at 20:57
So are you proposing that instead of writing `obj.a.b.c` he write `_.get(obj, 'a.b.c')`? That's insane. The tone of his question certainly does not suggest that using lodash is a requirement; it's fairly clear he doesn't know how to access properties on an object, and just imagines that he might need to use to lodash to do that. – Dec 20 '16 at 20:57
1

The question is explicitly about lodash. It is tagged as lodash, it has lodash in the question text and heading. Not sure how you can suggest it's not. – Gruff Bunny Dec 20 '16 at 21:04
Though overkill for OP, it's what he asked. The answer doesn't deserves a downvote. Downvote the question for a lack of research. – Emile Bergeron Dec 20 '16 at 21:28

score 1 · Answer 3 · answered Dec 20 '16 at 20:47

1

fields[required] will work.

console.log(fields[required]);

answered Dec 20 '16 at 20:47

Ninja

3 Answers3