How to find an object by id?

Question

I have this collection of objects:

const objects = [
  { id: '11', name: 'ron', surname: 'lesner', group: 'A' },
  { id: '12', name: 'don', surname: 'lesner', group: 'B' },
  { id: '13', name: 'ton', surname: 'lesner', group: 'A' },
]

I need to return the object with matching id using Lodash.

The following code returns undefined:

_.find(object, id, 11);

I'm expecting this result:

{ id: '11', name: 'ron' , surname: 'lesner' , group: 'A' }

Suren Srapyan · Accepted Answer · 2018-01-18T13:23:38.877

5

You need to pass '11' - string representation of the 11 number, because your id is of type string. With Lodash#find

const object = [
     {id: '11', name: 'ron' , surname: 'lesner' , group: 'A'},
     {id: '12', name: 'don' , surname: 'lesner' , group: 'B'},
     {id: '13', name: 'ton' , surname: 'lesner' , group: 'A'}
];

const found = _.find(object , ['id', '13']);

console.log(found);

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>

Also you can use pure Javascript instead of lodash?

const object = [
     {id: '11', name: 'ron' , surname: 'lesner' , group: 'A'},
     {id: '12', name: 'don' , surname: 'lesner' , group: 'B'},
     {id: '13', name: 'ton' , surname: 'lesner' , group: 'A'}
];

const found = object.find(item => item.id === '11');

console.log(found);

edited Jan 18 '18 at 13:23

answered Jan 18 '18 at 11:32

Suren Srapyan

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actually I am coding in Typescript so wondering if any new design pattern will be seen.it is okay with javascript also. – Aditya Jan 18 '18 at 11:33
Is this a lodash? ._find is not used. – Aditya Jan 18 '18 at 11:34
I need to use lodash function only – Aditya Jan 18 '18 at 11:35
@Aditya See updated. I have provided lodash version – Suren Srapyan Jan 18 '18 at 11:35
okay..will try and update. – Aditya Jan 18 '18 at 11:35
found = undefined I am getting – Aditya Jan 18 '18 at 12:06
See my examples – Suren Srapyan Jan 18 '18 at 12:19
I tried const `found = _.find(object , 'id', '13');` it returns me the first object always..and not actual 13th one – Aditya Jan 18 '18 at 12:27
and using with`found = _.find(object , ['id', '13']);` return as undefined – Aditya Jan 18 '18 at 12:28
Work with my examples. Something wrong is in your local – Suren Srapyan Jan 18 '18 at 13:23

score 0 · Answer 2 · answered Jan 18 '18 at 11:42

You are not using the lodash find function in accordance with hiw its intended to be used. Please check source code and coments at https://github.com/lodash/lodash/blob/master/find.js

Also for something so trivial it can be argued that you should better use the native array functions if you cannot motivate library use with the need for extreeme performance or other reasons; and also dont call an array Object. It will make your code confusing.

How to find an object by id?

2 Answers2