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up vote 1 down vote favorite

I have this list of objects -

var o_list = [{id:1,name:jo},{id:2,name:mo}];

and I want to extract something like this -

var list = [1,2]

Is there anything already built or how can we implement this.

share|improve this question
    
There's no such thing as a "JSON Object" – adeneo Jun 30 '16 at 13:51
    
@adeneo - Then should we use object in JSON format? – neha soni Jul 1 '16 at 7:37
up vote 1 down vote accepted

You can just map it

var o_list = [{id:1,name:"jo"},{id:2,name:"mo"}];

var list = o_list.map(x => x.id);

document.body.innerHTML = '<pre>' + JSON.stringify(list, 0, 4) + '</pre>';

share|improve this answer
    
This is not working?? – neha soni Jul 1 '16 at 10:54
    
It's working perfectly fine, as the snippet above shows. If it's not working for you, something else must be wrong. – adeneo Jul 1 '16 at 19:42
    
Yes might be the case. Because in browser console its working but giving error in my project. – neha soni Jul 2 '16 at 15:28
up vote 1 down vote

you can do this using filters https://docs.angularjs.org/api/ng/filter/filter

var myApp = angular.module('myApp', []);

myApp.controller("myCtrl", ['$scope', '$filter',
  function($scope, $filter) {
    $scope.values = [{
      id: 1,
      name: 'asdas'
    }, {
      id: 2,
      name: 'blabla'
    }];
    
    // this is how you use filters in your script
    console.log($filter('extract')($scope.values));
  }
]);

myApp.filter('extract', function() {
  return function(input) {
    return input.map(x => x.id);
  }
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="myApp">
  <div ng-controller="myCtrl">
    <ol ng-repeat="id in values | extract">
      <li ng-bind="id"></li>
    </ol>
  </div>
</div>

share|improve this answer
up vote 0 down vote

You can use only javscript forEach array method to get desired result

var o_list = [{id:1,name:'jo'},{id:2,name:'mo'}];

var list =[];
o_list.forEach(function(item){
list.push(item.id)

})

console.log(list)

JSFIDDLE

share|improve this answer
up vote 0 down vote 
var o_list = [{id:1,name:jo},{id:2,name:mo}];
var list = [];

for(i = 0; i < o_list.length; i++){
   list.push(o_list[i].id);
}
share|improve this answer
up vote 0 down vote

you can use this simple for loop

var o_list = [{id:1,name:'jo'},{id:2,name:'mo'}];
var s=[];
for (var i=0;i< o_list.length;i++){
 s.push(o_list[i].id);

}
share|improve this answer
up vote 0 down vote

Alternate you can use underscore.js each method to get results

      var o_list = [{id:1,name:'jo'},{id:2,name:'mo'}];

        var list =[];
        _.each(o_list, function(d){
                         list.push(d.id)
                      });
share|improve this answer

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