I have this array of objects:
$scope.frequencies = [{Id:124,clientId:3,name:'qqq'},
{Id:589,clientId:1,name:'www'},
{Id:45,clientId:3, name:'eee'},
{Id:567,clientId:1,name:'rrr'},
{Id:45,clientId:3,name:'eee'},
{Id:567,clientId:7,name:'rrr'}]
I need to remove all items from array above except where clientId = 3.
How can I implement it?
Don't remove but re-assign with
var $scope = {};
$scope.frequencies = [{Id:124,clientId:3,name:'qqq'},
{Id:589,clientId:1,name:'www'},
{Id:45,clientId:3, name:'eee'},
{Id:567,clientId:1,name:'rrr'},
{Id:45,clientId:3,name:'eee'},
{Id:567,clientId:7,name:'rrr'}];
$scope.frequencies = $scope.frequencies.filter(item => item.clientId === 3);
console.log($scope.frequencies);
Array#splice for in-place changes - just sayin, because you can't always re-assign an array without unwanted side effectsYou can simply use this code snippet:
$scope.frequencies = $scope.frequencies.filter((item)=> item.Id!=3);
.splice()? What is the a in a.length?
.splice()? It's redundant, because with params (0, $scope.frequencies.length) its return value will be all of the items from the array produced by .filter(), so you'd get the same result without it...In lodash, you could use _.remove(array, [predicate=_.identity]).
Removes all elements from
arraythatpredicatereturns truthy for and returns an array of the removed elements. The predicate is invoked with three arguments: (value, index, array).
var $scope = {};
$scope.frequencies = [{ Id: 124, clientId: 3, name: 'qqq' }, { Id: 589, clientId: 1, name: 'www' }, { Id: 45, clientId: 3, name: 'eee' }, { Id: 567, clientId: 1, name: 'rrr' }, { Id: 45, clientId: 3, name: 'eee' }, { Id: 567, clientId: 7, name: 'rrr' }];
_.remove($scope.frequencies, a => a.clientId !== 3);
console.log($scope.frequencies);.as-console-wrapper { max-height: 100% !important; top: 0; }<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.15.0/lodash.min.js"></script>Use filter method which based on a comparison it returns an array of elements that meet the filter. On ES5:
$scope.frequencies.filter(function(element){
return element.clientId == 3;
})
On newer, ES6:
$scope.frequencies.filter( element => element.clientId != 3)
Check filter documentation: filter
