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1

Is there a simple way to find an object in a list based on an attribute value, without looping on the list?

For example given a list like the following :

var lst = [{name : "foo", value : "fooValue"}, {name: "bar", value: "barValue"}];

is there some kind of "find" method, such that lst.find("name", "foo") would return the object which has a "name" attribute with the value "foo"?

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2  
At most, the loop would be hidden from you, but still execute inside some other function. If that is acceptable you can use the filterFilter service. – Yoshi Dec 4 '13 at 15:22
    
I know a loop has to be done somehow, I'm just searching for a lighter syntax. – KayKay Dec 4 '13 at 16:06
up vote 7 down vote accepted

You can use the $filter service:

angular.module('app', [])

function ParentCtrl($scope, $filter){
    var lst = [{name : "foo", value : "fooValue"}, {name: "bar", value: "barValue"}, { name: 'foo', value: 'something else'}];
    var newTemp = $filter("filter")(lst, {name:'foo'});
    console.log(newTemp);
}

jsFiddle: http://jsfiddle.net/W2Z86/

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Thanks that's what i was looking for. – KayKay Dec 4 '13 at 16:12
    
Thanks @matthew-berg . For other noobs (like me). In case it's not immediately obvious, newTemp is an array of objects that match the filter. If you know you've got a single object that matches, you might want the first element in the array (i.e. newTemp[0] ). – James Jun 8 '15 at 10:17
up vote 0 down vote

If you want a strict comparison, you need to set the comparator (3rd argument) to true like the following (based on Mathew's answer):

var newTemp = $filter("filter")(lst, {name:'foo'}, true);

See the doc on $filter on AngularJS site: https://docs.angularjs.org/api/ng/filter/filter

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