Get value by property from javascript object list [duplicate]

Question

i want to get property value from javascript object list, i have a list

var cars = [{ id: 1, name: 'Audi' }, { id: 2, name: 'BMW' }, { id: 1, name: 'Honda' }];

Now i want get id or name property value by using for loop like this

var cars = [{ id: 1, name: 'Audi' }, { id: 2, name: 'BMW' }, { id: 1, name: 'Honda' }];
 var items=[];
 var firstProp='id';
 for (var i = 0; i < model.length; i++) {

  //original work
  items.push({ value: model[i].firstProp});//here is the problem
 }

please give good advise, thanks.

What do you mean "no duplicate here"? It's exactly what you need. Same question. Same issue. Same answer. — cookie monster
– cookie monster, Commented Jul 13, 2014 at 5:35
...or if you're not happy with that duplicate, you'll find many others if you use Google. — cookie monster
– cookie monster, Commented Jul 13, 2014 at 5:36
...notice also that the solution is even in your question. model[i] is using a variable to access the property of an object. And yes, I know it's an Array. Arrays are Objects in JavaScript. — cookie monster
– cookie monster, Commented Jul 13, 2014 at 5:39

Andrius · Accepted Answer · 2014-07-13 05:35:18Z

1

If I understand your problem correctly, you should use square bracket notation instead of dot notation:

//..  
items.push({ value: model[i][firstProp]});//here is the problem

answered Jul 13, 2014 at 5:35

Andrius

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1 Comment

EasyBB Over a year ago

Yes you are correct from what I see from the OP's post model[i].firstProp is calling the property firstProp and not id as assigned to that variable though it would just be easier to use model[i].id

cookie monster · Accepted Answer · 2014-07-13 05:41:33Z

0

You should do like this

items.push({ value: model[i][firstProp]});

the . notation expects the firstProp to be present as a key in dictionary, since the firstProp is a variable that contains a string you should use [] notation.

edited Jul 13, 2014 at 5:41

cookie monster

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answered Jul 13, 2014 at 5:38

Prashanth Pamidi

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