remove empty array in multidimensional array

Question

var app = angular.module("app", []);

app.controller("MyCtrl1", MyCtrl1);

function MyCtrl1($scope) {

    $scope.block = new Array();

    $scope.block[0] = new Array();
    $scope.block[0].push("111");
    $scope.block[0].push("112");
    $scope.block[0].push("113");
    $scope.block[0].push("114");
    $scope.block[0].push("115");

    $scope.block[2].length = 0;

    $scope.block[3] = new Array();
    $scope.block[3].push("111");
    $scope.block[3].push("112");
    $scope.block[3].push("113");
    $scope.block[3].push("114");
    $scope.block[3].push("115");


    $scope.block.filter(Boolean);

    console.log($scope.block.length.toString());

}

[["111","112","113","114","115"],["111","112","113","114","115"],[],["111","112","113","114","115"]]

how to remove the empty array Thanks help~

JLRishe · Accepted Answer · 2015-04-03 14:34:29Z

3

Array#filter does not modify the array it's called on. It returns a new array.

Also, Boolean([]) is true so that won't work here.

Do this:

$scope.block = $scope.block.filter(function (arr) {
    return arr.length;
});

http://jsfiddle.net/wmLmrqrq/

answered Apr 3, 2015 at 14:34

JLRishe

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1 Comment

Duke Over a year ago

Thank you for your swift response to solve my problem, thank you

Maninacan · Accepted Answer · 2015-04-03 14:49:15Z

1

If I understand your question correctly, this should do the trick:

$scope.block.splice(2,1)

The first parameter specifies the index of the "block" array. The second parameter specifies how many items to remove starting at that index.

answered Apr 3, 2015 at 14:49

Maninacan

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2 Comments

JLRishe Over a year ago

@user3382559 This will only work if you know in advance where the item to remove is (and won't remove multiple items at once).

Duke Over a year ago

@JLRishe Good ~ Thank you for reminding me, I will pay attention to these

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