Question

97

Filter Array of objects and count the filtered elements in Javascript

rated 0 times [ 98] [ 1] / answers: 1 / hits: 37424 / 8 Years ago, wed, november 2, 2016, 12:00:00

I have array of different objects which look like this:

[{

   color:'red',

   'type':'2',

   'status':'true'

 }

 {

   color:'red',

   'type':'2',

   'status':'false'

 }]

I want to filter the one element like status and then count the filtered, for example if status is false then return 1.

I have tried the below code but I am not sure what I am doing here:

for (i = 0; i < check.length; i++) {

  var check2;



  console.log(check[i].isApproved);

  (function(check2) {

    return check2 = check.filter(function(val) { 

        return val == false 

    }).length;

  })(check2)



  console.log('again Rides',check2);

}

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sonja

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answered 8 Years ago kaitlynd · Accepted Answer

Well, you could just do a count, or you could run a filter and get the length of the final array.

var count = 0;

var arr = [{color:'red', type:'2', status:'true'},

           {color:'red', type:'2', status:'false'} ];

// Showing filterin to be robust. You could just do this in 

// a loop, which would be sensible if you didn't need the subarray. 

var filtered = arr.filter ( function ( d ) {

    // Note that I'm testing for a string, not a boolean, because

    // you are using strings as values in your objects. 

    // If it was a boolean, you'd use if ( d.status ) { ... }

    count++;

    return d.status === 'false';

});



// These should be the same, reflecting number of objs with 'false'

console.log ( count );

console.log ( filtered.length );

// This should trace out a sub array of objs with status === 'false'

console.log ( filtered );