Is it possible to delete all scope variable of a controller? AngularJS - angularjs

Question

I am new to AngularJS and i dont know is it possible to delete all scope variables of a controller.I am using ng-controller with ng-repeat, like this.
<div ng-controller="main">
<div ng-repeat="x in list" ng-controller="test">
<input type="text" ng-model="text">
<span ng-click="remove($index)"> x </span>
<div>
</div>
JS
myapp.controller('main',function($scope){
$scope.list=[1,2,3,4]
})
myapp.controller('test',function($scope){
$scope.text="untitiled"
})
I want to remove the clicked scope.Can anyone help me or please suggest me a better way. Thanks

Answer 1

The question isn't very clear, but it looks like you may want to remove the item after clicking. Since you are passing into the remove function the index, you can splice it out. The DOM will autoupdate and remove that from the list:
$scope.remove = function(i) {
$scope.list.splice(i,1);
console.log($scope.list);
}
In the event you are doing something different in that you only want to hide it, you would push the index onto another array and then use something like ng-show or ng-hide.
$scope.remove2 = function(i) {
$scope.hideList.push(i);
}
$scope.shouldHide = function(i) {
return $scope.hideList.indexOf(i)!=-1;
}
<div ng-repeat="number in list2" >
{{number}}
<span ng-hide='shouldHide($index)' ng-click="remove2($index)"> x </span>
</div>
Here is a simple example of both scenarios. In real life, usually we are dealing with arrays of objects and what you might be doing is setting a property on one of the objects to hidden and controlling it that way.
Demo: http://plnkr.co/edit/G7UINKUCBJ4yZhQNtuJ2?p=info
If you actually want to remove all the keys from the scope:
function removeKeys() {
for(key in $scope) {
if (key.substr(0,1)!='$' && key!='this')
delete $scope[key];
}
}