Question

62

return object property using lodash from array

rated 0 times [ 63] [ 1] / answers: 1 / hits: 57235 / 10 Years ago, tue, august 26, 2014, 12:00:00

I have been trying to return a property of an object by filtering it first. Here's what I did:

var characters = [

  { 'name': 'barney',  'age': 36, 'blocked': false },

  { 'name': 'fred',    'age': 40, 'blocked': true },

  { 'name': 'pebbles', 'age': 1,  'blocked': false }

];



_.find(characters, function(chr) {

     return  chr.age == 40

});

It returns whole object where as I want to return specific property. Can anyone guide me how can I do it?

Any help will be appreciated.

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jaidyn

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answered 10 Years ago jonathoncamrynv · Accepted Answer

You could use the Lodash chaining ability. As its name implies, it enables you to chain Lodash methods calls. _.filter and _.map are appropriate here:

const characters = [

  { 'name': 'barney',  'age': 36, 'blocked': false },

  { 'name': 'fred',    'age': 40, 'blocked': true  },

  { 'name': 'pebbles', 'age': 1,  'blocked': false },

]



const names = _(characters)

  .filter(c => c.age < 40)

  .map('name')

  .value()



alert(names)

<script src=https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.3.0/lodash.min.js></script>

For the record, this is how you can do in pure JS:

const characters = [

  { 'name': 'barney',  'age': 36, 'blocked': false },

  { 'name': 'fred',    'age': 40, 'blocked': true  },

  { 'name': 'pebbles', 'age': 1,  'blocked': false },

]



const names = characters

  .filter(c => c.age < 40)

  .map(c => c.name)



alert(names)