CODEWITHSUNDEEP
javascriptarraysangularjs
arun kumar
arun kumar

Reputation: 105

Filter array of object with unique value from duplicate values

var  Error-dictionary = [
   {
      code:599,
      MSG:'unknown' 
   },
   {
      code:404, 
      MSG:'not found'
   },
   {
      code:599, 
      MSG:'unknown'
   }
]

I want something like this:

[
  {
     code : 599,
     count:2,  
     MSG : 'unknown', 
     code :404,
     count:1,
     MSG : 'not found' 
  }
]

and this need to push into $scope.alerts as a MSG

Error code and MSG are dynamic

Upvotes: 1

Views: 92

Answers (2)

Marko
Marko

Reputation: 10992

You can get the number of an specific property in a array of objects, by using underscore.js. Nice and easy!!! 

<script src="http://underscorejs.org/underscore-min.js"></script>
<script>
  window.onload = function () {
    var dict = [
      {code: 599, MSG: 'unknown' },
      {code: 404, MSG: 'not found'},
      {code: 599, MSG: 'unknown'}
    ];

    var res = _.groupBy(dict, function (d) {
      return d.code;
    });

      var dictArr = []; 

        for(var key in res) {

            var code = key; 
            var value = res[key]; 
            var MSG = value[0].MSG; 
            var count = value.length; 
            dictArr.push({ code : code, MSG: MSG, count: count  }); 

        }; 

        console.log(dictArr); 


  };
</script>

Upvotes: 1

charlietfl
charlietfl

Reputation: 171679

Create a temp object that uses the error code and message as keys. Then map that temp object to output array

var tmp = {}, res =[];
data.forEach(function (item) {
    var tmpKey = item.code + item.MSG;
    if (!tmp.hasOwnProperty(tmpKey)) {
        tmp[tmpKey] = angular.copy(item);
        tmp[tmpKey].count = 0;
    }
    tmp[tmpKey].count++;
});

for( var key in tmp){
   res.push(tmp[key]; 
}
$scope.errors = res;
console.log($scope.errors);

Upvotes: 0

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