Handling JSON using forEach loop

Question

I have a JSON Array and i want to get the object which has the 'type':'optional'. how do i achieve that using forEach in Angular JS? please help me..

Please find below the JSON array

 $scope.headerAll= 

 [
  {
    "field": "first_name",
    "displayName": "First name",
    "type": "required"
  },
  {
    "field": "last_name",
    "displayName": "Last Name",
    "type": "required"
  },
  {
    "field": "email",
    "displayName": "Email",
    "type": "required"
  },
  {
    "field": "isMarried",
    "displayName": "marital Status",
    "type": "optional"
  }
]

If you want to do the filtering in the view itself (ngRepeat) check out this example - stackoverflow.com/questions/14733136/… — Faris Zacina
– Faris Zacina, Commented Sep 22, 2014 at 9:46

maurycy · Accepted Answer · 2014-09-22 09:45:27Z

1

It's fairly easy to do it

$scope.optional = []
angular.forEach($scope.headerAll, function (v) {
  if (v.type === 'optional') {
    $scope.optional.push(v)
  }
})

answered Sep 22, 2014 at 9:45

maurycy

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Comments

bmazurek · Accepted Answer · 2014-09-22 11:57:56Z

0

it's bit faster and safer solution solution:

 for (var i in $scope.headerAll){
    if ($scope.headerAll.hasOwnProperty(i) && $scope.headerAll[i].type === "optional"){
        console.log("do something");
    }
  }

you can check performance here

http://jsperf.com/angularjs-foreach-vs-native-foreach/5

plnkr

answered Sep 22, 2014 at 11:57

bmazurek

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2 Comments

maurycy Over a year ago

1.1.5 in the comparision you provided is a bit outdated here is updated, check it out jsperf.com/angularjs-foreach-vs-native-foreach/23

maurycy Over a year ago

and even better tests made by Igor Minar: jsperf.com/angularjs-foreach-vs-native-foreach/21

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