AngularJS count matching occurrences in an array

Question

Objective: I want to count the occurrences of an id matching between arrays The code below finds the match but we need to count the result

    var arr1 =  [ 

     {
    "image" : "FF815_1.jpg",
    "id" : "NO"
  }, {
    "image" : "FF815_0.jpg",
    "id" : "NO"
  }, {
    "image" : "FF815_4.jpg",
    "id" : "NO"
  }, {
    "image" : "PIOJD_2.jpg",
   "id" : "NO"
  }, {
    "image" : "PIOJD_4.jpg",
    "id": "JD"
  } ];
  
var arr2 =  [ 

     {
    "image" : "FF815_1.jpg",
    "id" : "NO"
  }, {
    "image" : "FF815_0.jpg",
    "id" : "NO"
  }, {
    "image" : "FF815_4.jpg",
    "id" : "NO"
  }, {
    "image" : "PIOJD_2.jpg",
    "id" : "JD"
  }, {
    "image" : "PIOJD_4.jpg",
    "id" : "JD"
  } ];


 angular.forEach(arr1, function(value1, key1) {
        angular.forEach(arr2, function(value2, key2) {
            if (value1.id === value2.id) {
            console.log(value2.id);
    }
    });
  });

Heres a fiddle: https://jsfiddle.net/62s0ae7v/

Ideas: create a new array and pass results to new array and count .length — user3265817
– user3265817, Commented Jan 8, 2021 at 6:54

Batu.Khan · Accepted Answer · 2021-01-08 06:52:02Z

1

Just add a simple counter like :

var counter = 0;
angular.forEach(arr1, function(value1, key1) {
    angular.forEach(arr2, function(value2, key2) {
        if (value1.image === value2.image) {
            console.log(value2.image);
            counter++;
        }
    });
});
console.log(counter);

answered Jan 8, 2021 at 6:52

Batu.Khan

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