It seems that angular.copy() is not properly working on one of the items that I am using it on. Here's the sample code and the screenshot that follows.
console.log("Copy");
$scope.traffic_data = traffic_data;
$scope.total_data = total_data;
console.log($scope.traffic_data);
console.log($scope.total_data);
console.log("Original");
$rootScope.original_traffic_data = angular.copy($scope.traffic_data);
$rootScope.original_total_data = angular.copy($scope.total_data);
console.log($rootScope.original_traffic_data);
console.log($rootScope.original_total_data);
console.log("Variable data");
console.log(total_data);
console.log("=============");
The problem I am facing is that the
$rootscope.original_total_data
is not copying the contents of the
$scope.total_data
as seen on the screenshot. I have highlighted the different console logs to differentiate them from one another.
The line
console.log($rootScope.original_total_data);
shows no contents even though I have used angular.copy on that variable.
What am I missing here? Please help. Thanks.
Also $rootScope is already declared in the controller and it is working for the
$rootScope.original_traffic_data
so why is it not working for
$rootScope.original_total_data?
Thanks.
total_data is an array, whereas traffic_data is an object.
angular.copy() distinguishes between arrays and objects. For objects it will copy all the keys (properties). For arrays, it will only copy the array elements and not any custom properties attached to it - see source code.
If you want to set properties on total_data, you should make it into an object instead. It does not appear to have any indexed values, so this should not be a problem, and it probably should have been an object in the first place.
Related
I'm making a scheduling app, and storing all the scheduled things in firebase with arrays. When I try to schedule something with the same string value, it fails and doesn't add it to the array. I don't know if this is something in swift I can edit, or if it's a firebase setting.
If it's something in swift, here's the code updating the array:
doc.updateData([
"Instructor": FieldValue.arrayUnion(["\(scheduleinstructor)"])
])
If it's something in firebase, could someone please explain a way around this or a simple fix I overlooked?
According to the documentation on adding items to an array:
arrayUnion() adds elements to an array but only elements not already present
So the fact that the duplicate entry is not added is by design. If you want to allow that, you'll have to:
Read the document with the array from the databae.
Extract the array from the document into your application code.
Add the item to the array.
Write the entire modified array back to the database.
I would like to achieve the following in visual basic. Is it possible to be able to have the reference change with each iteration inside the for loop? I have an array of object names (as Strings) stored in "objectArray" that contains the names of objects with the property "valuePath". I would like to change the property of "valuePath" for each object from "objectArray" in one for loop. I do not want to statically call each of the objects manually. I can access the property of the object by calling "Me.objectName.valuePath" from inside the method where this code exists.
For item in objectArray
Me.item.valuePath = "some value"
Next
Any help would be greatly appreciated! Thank you.
I ended up saving an array of Objects instead of an array of Strings and that solved my problem. Thank you for your assistance!
I am using angular 1.3.15. I want to bind data, such a way that, first time variable($scope.twotap_builtin_cart.sites[sikey].shipping ) assigned data from $scope.shipping_address. Later on even if , variable named $scope.twotap_builtin_cart.sites[sikey].shipping data modified, it should not haveve any impact on other $scope.shipping_address. I am talking about one time binding or one way binding
you should use angular.copy() for deep coping
$scope.shipping_address = angular.copy($scope.twotap_builtin_cart.sites[sikey].shipping)
this way even if $scope.twotap_builtin_cart.sites[sikey].shipping modify its not gonna bind to the $scope.shipping_address
I think that you are not looking for binding but simply assigning a value of a variable to another. When working with JSON objects (and $scope is one such object), making a = b is NOT copying the contents of b to a, but making both a and b reference the same object. The best way is to perform the assignment as:
b = JSON.parse(JSON.stringify(a)) ;
In your case:
$scope.twotap_builtin_cart.sites[sikey].shipping = JSON.parse(JSON.stringify($scope.shipping_address)) ;
One you do this, both variables hold the same information but they can be changed without affecting the other.
A similar requirement was asked in this question:
Edit with bootstrap modal and angulajs
Similarly, you can use the AngularJS copy function to replicate your data without any lingering bindings.
$scope.twotap_builtin_cart.sites[sikey].shipping = angular.copy($scope.shipping_address);
Here we are copying the value from $scope.shipping_address into the other variable. Now even if you make a change to $scope.twotap_builtin_cart.sites[sikey].shipping, this will not be reflected in $scope.shipping_address - which is what you want.
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Does anyone have any idea what I can do to my code to make this $.each / _.each work? (I'm using both jquery and underscore, either will do)
The Array[0] concerns me. Maybe that is why the .each is getting stepped over.
The two console.log's on either side of the each log the entire object perfectly, but when I break at the each and type "regionedAps" into the console, I get an empty array.
You have an array that you are treating like an object. You should make regionedAps an object, then .each will iterate over it properly.
var regionedAps = {};
I don't think you need $.makeArray()
There is an array of objects. I'm trying to removeChild an object from that array like below. removeChild works fine but the array won't refresh itself after removing uppest object. As you can see in below, i tried to trace array items out.
Firstly, array has three items, obviously the myArray.length must be 3.
After removing a child, myArray.length must be 2, but it get 3 (Wrong).
removeChild(myArray[currShape]);
trace(myArray);
Please tell me what am i missing here.
Assuming you're using ActionScript, removeChild() only serves to take objects off the stage. It doesn't take things out of an array. You have to take the object out of the array manually in another statement.
You could try something like:
removeChild(myArray.splice(currShape,1));
This removes the entry from the array and returns that entry that will be used to remove it from the stage.