How to count the number of defined values ​​in an angular model?

Question

Angular

Good afternoon.
There is data like
[{name:'John', phone:'555',myvalue:1},{name:'Mary', phone:'800',myvalue:0}, etc.
How to count the number of defined values ​​in an angular model where myvalue=0 ?
Thanks

Answer 1

var count = data.filter(item => item.myvalue === 0).length;

Answer 2

https://docs.angularjs.org/api/ng/function/angular... ;)

Answer 3

$scope.count_true = 0;
$scope.count_false = 0;
$scope.count_study = 0;
$.each($scope.SpisokVoprosov, function(index, value){
if(value.reshenie==="1"){$scope.count_true++;}
if(value.reshenie==="0"){$scope .count_false++;}
if(value.reshenie===""){$scope.count_study++;}
});