Javascript, find object in list of objects by id

Question

I have a list of objects in where I need to find one specifically by an ID. So very simply like so:

{ 
 {
   "id": "1"
 },{
   "id": "2"
 }
}

I have a function where I want to find the object by it's id, that does not work like so

 function findOb (id) {

   return _.find(myList, function(obj) { return obj.id === id } );

 }

it is not returning the correct object (this is using lodash) uncertain what I am doing incorrect and could use some help. Thanks!

edit - I don't know if this helps but I am building and trying to search an object in this format - https://github.com/pqx/react-ui-tree/blob/gh-pages/example/tree.js . So there are just objects with module and leaf sometimes, and I want to be able to search and find by the 'module' key. Thanks for the feedback everyone!

I am stuck like that right now, is there a way to achieve this without keys? — ajmajmajma
– ajmajmajma, Commented Oct 21, 2015 at 20:57
can you confirm this is a valid JSON object? it does not look like valid JSON — blurfus
– blurfus, Commented Oct 21, 2015 at 20:57
@ajmajmajma How about using an array of objects? [{id: 1}, {id: 2}]. — Sebastian Simon
– Sebastian Simon, Commented Oct 21, 2015 at 20:58
@ochi That's needed in JSON, but not in Javascript literals. — Barmar
– Barmar, Commented Oct 21, 2015 at 21:00

Barmar · Accepted Answer · 2015-10-21 20:59:45Z

7

Your code should have worked, but it can be simplified.

If you provide a property name for the predicate argument to _.find, it will search that property for the thisArg value.

function findOb(id) {
    return _.find(myList, 'id', id);
}

The only problem I can see with your code is that you use === in your comparisons. If you pass 1 as the ID argument instead of "1", it won't match because === performs strict type checking.

answered Oct 21, 2015 at 20:59

Barmar

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