If I want to load a list of blocks based on a type I know I can do something like the following:
var blockType = contentTypeRepository.Load<MyBlock>();
But if I want to load the list based on both a type and a property on each block called tag being equal to "A", and at the same time have the list sorted by the property date on each block, how would I do that?
Related
I want to delete an item from an array that is inside a collection that is inside another collection (A nested collection) I have all the data that I need to achieve this, however I do not know how to write I have a slightly idea of how to (I'll be testing stuff on my own, but will leave the question here as well)
I'm using Material UI DataGrid to render my tables and to delete/edit them. I have a piece of information that is saved on my Local Storage in case I required it:
this is how my table looks:
When I select an ITEM and delete it is holding the ID of the item in the data:[Array]
those IDs are the IDs they hold in the data[array] -> :
finally I need to access this document, well I have the following
db.collection("usuarios").doc(user.uid).collection("pedidos").doc(id)
which brings the following:
which means I'm bringing the correct document, however I have no idea how to "update" or delete the array called data[], any ideas? What I want to achieve is that when I press the delete button it will update the array based on the Item selected so if it was Item ID: L-2627 then go through the array inside that collection, get the array called data and delete the item stored in the array.
Read the document into memory.
Modify the array by finding the item and removing it, again from memory.
Write the modified contents back to the document.
There is no shortcut or single operation for doing any this. The fact that the document is in a subcollection doesn't change anything. It's just how you have to modify arrays when you don't know the entire contents of the array item ahead of time.
I have a stored object literal which returns 2 or more objects depending on the users actions. This is then filtered further depending on if they are complete or not, so there are generally 2 object arrays that are sent to the view.
in the view i do a simple ngFor
<ion-card *ngFor="let item of inProgressList">
...
Which is a segment of the complete list held in a variable programsList
In order to change an item from in progress to complete i need to update the object, which works fine, however i cannot correctly pass the index.
filledOutFormsData[this.index].complete = true;
As i cannot get the correct index based on the array that has been filtered.
I cannot use
<ion-card *ngFor="let item of inProgressList; let i = index">
Because that will return a index of the looped items which will be incorrect once one other object is equal to complete
Basically i need to get the object key from the original object literal into the filtered array to use in the view so that i can pass the index.
So i got this working by adding a custom pipe which filters the programsList instead of passing in two separate lists, I can then use the trackBy option to pass the correct index.
I'm designing an inventory system. right now, I need to test whether or not an item is in the inventory in order for the stage to know whether to instantiate that item in the particular level or not.
I add the items to the levels in groups, so this code is located within an array loop which "unloads" the "pack" of items corresponding to each level.
if (inv.indexOf(group[i]) == -1) {
//add item + item functionality
}
This method works when I add the item to the inventory such as this:
inv.push(group[i]);
if (inv.indexOf(group[i]) == -1) {
//add item + item functionality
}
But that doesn't work, because why would I add an item to the inventory without the user collecting it first? so the code is actually structured as so:
if (inv.indexOf(group[i]) == -1) {
//if item is not in inventory, add to stage
addChild(group[i]);
//when a user clicks this (any) item,
group[i].addEventListener(MouseEvent.CLICK, function itemFunctionality(e:MouseEvent){
//target item clicked
var item = e.target;
//add the item to the inventory
inv.push(item);
//sidenote: if i were to check inv.indexOf(item) here, i
//would get a positive index. unfortunately,
//i cant check whether the item is in the inventory
//after its already been added to the level...
item.removeEventListener(MouseEvent.CLICK, itemFunctionality);
});
}
The problem is when you leave and come back to the level, the items you already collected re-instantiate. If you collect an item again, the inventory adds a copy of the item you already collected.
The inv.indexOf(group[i]) checker doesn't understand that when the array loop reaches the corresponding, item group[i] == the object added to the inventory through inv.push(item) or in other words inv.push(e.target) (which, of course, I couldn't write directly into the code)...
When I trace whats inside of static array inv, what group[i] is within the array loop, or what e.target is, they all output the same type of item, "[object itemName]", signifying that the indexOf check SHOULD match up.
Update :
It appears if I make the items static as well as the array group they belong to this method works within the mouse event callback:
inv.push(item);
group.splice(group.indexOf(item), 1);
Though I had to remove the items and the item groups from their own class and put them inside of the level class itself... I feel this method kind of sucks because everything is getting disorganized and grouped into the same class.
Any helpful suggestions?
Objects are matched with their references. It means two objects created from the same class are not identical, they are different objects.
Assign unique IDs to your items and use them in your inventory. Like;
inv.push(item.id);
if (inv.indexOf(item.id) == -1) {
//add item + item functionality
}
Working with IDs is also better for serializing / deserializing.
There's your problem:
The problem is when you leave and come back to the level, the items you already collected re-instantiate.
Why would coming back to a level cause reinstatiation of any kind?
You should only ever once create each level object and part of that process should be creating all objects contained in that level. Visiting a level merely is an interaction with that object, which may include removing objects and adding them to the inventory. Once the objects are gone from the level, they are gone.
There's no reason to reinstantiate a level (or any of the objects within it) when revisiting it. If you are running into this problem because you are using a time line based approach with frames and gotoAndStop() to switch between levels then this is the core of your problem and you should stop doing that.
To view my code follow this link
I've created a directive which handles an array of items (it will always be two because it's a "from" and "to" date pair).
I want to make the array items accessible as separate values for later use so I refer to the array items like this
vm.data = ['data a', 'data b'];
vm.separateData = vm.data[0];
vm.otherData = vm.data[1];
When I implement a two way bind into the directive, the vm.data[0] and vm.data[1] references are updated but the vm.separateData and vm.otherData aren't.
Is there a way of making this work or should I just restructure the rest of my app (where needed) to accomodate for array items?
In my fiddle link (same as above) try changing the text input values and you'll see what I mean.
vm.data[0] is a string and thus it is a primitive datatype in javascript which is immutable. So you bind the immutable String 'Data a' to vm.separateData, which is not a reference to data[0].
If you want to copy the reference to the array into vm.separateData try to wrap your strings in other javascript objects, e.g.
vm.data = [{"value":"Data a"}, {"value":"Data b"}]
and then you can reference
vm.separateData = vm.data[0];
and access the value via
vm.separateData.value
Can I filter by.repeater('object in array') so it returns just objects with a specific value in Protractor?
E.g. something like
var filteredElements = element.all(by.repeater('object in array')).column('object.type').value('car'));
Is something like this possible without creating additional loops (and without creating new promises)?
These elements doesn't have any unique identifier? If they have you can do a cssSelector searching for that specific identifier (id, class or any other attributes..)
If they don't have ny unique identifier, the best way to do that is change you FE application to add the class "car" to each element that you want to have, and then, have a selector that retrieves all the element with class "car".