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QUESTION
I want to use navigation bottom menu with using navHostFragment in main activity. But when I run the program ,it stops on setContent in onCreat method MainActivity java code. I try to use bindig class insted setContent directly but nothing changes.
this is MainActivity.java
...ANSWER
Answered 2021-Jun-14 at 19:33It seems that your HomeFragment
doesn't have no parameters constructor.
If you want to use fragment that requires constructor parameters you need to provide FragmentFactory
to navigation component.
Add empty constructor HomeFragment()
to HomeFragment, and it should work.
QUESTION
I have a Swift application with 4 bottom tabs. In the home tab I have a video running. In the 4th tab I have a favorites list.
When the user changes tabs, if he's on the home screen, the video should stop. Also, when the user taps on the 4th tab, the favorites list should update so that the user can see the recent additions.
I have the following on the home tab view controller:
...ANSWER
Answered 2021-Jun-12 at 17:59TabBarController’s delegate does not have to be either of the view controllers. It could be some other object (not even a view controller) that could hold weak references to both view controllers, for example, or post a notification etc
QUESTION
I have a question in regards with the below,
- Left outer join of two tables who are not connected through Foreign Key.
- Order by the results matched in second table.
- I would like this to be done in LINQ Query method syntax as I am adding lots of conditions depending on the input provided along with skip and limit.
If we have below Product and Favorite tables
So the output that I would like to have is:
meaning with the favorites as part of first set and which are not favorites should be behind them. Below are the tries that I did. I am able to join the tables get the output but not sure how I can make sure that in the first page I get all the favs.
This answer was very near to what I thought but it gets the result and then does the ordering which will not be possible in my case as I am doing pagination and using IQueryable to get less data.
Group Join and Orderby while maintaining previous query
Open to any solutions to achieve the same.
...ANSWER
Answered 2021-Jun-09 at 15:03I would do something like this:
QUESTION
I want to create a page which put selected items on favourite page, so I have found the Hive db and in it's docs I found how to do this properly. I tried this way and now I am getting stucked, because favourite items aren't selected and put on the another page. Also I was trying another way: I created function onFavoritePress()
and just used if-else statement inside onPressed
function and the code looks like this:
ANSWER
Answered 2021-Jun-08 at 08:12You open the Hive box for a single Food
item, but inside the put method, you are storing the whole list (List
) - this is mentioned in the error message. Adjust your code and update your put
method to store a single Food
item:
QUESTION
I have a tabview with three SwiftUIViews (HomeView, FavoritesView and ContactsView) each of these views look like this Home View below.
...ANSWER
Answered 2021-Jun-08 at 00:49//Create an enum for your options
enum Tabs: String{
case home
case favorites
case contacts
}
struct TitledView: View {
//Control title by the selected Tab
@State var selectedTab: Tabs = .favorites
var body: some View {
NavigationView {
TabView(selection: $selectedTab) {
Text("HomeView()").tag(Tabs.home)
.tabItem {
Label("Home", systemImage: "house")
}
//Set the tag
.tag(Tabs.home)
Text("FavoritesView()")
.tabItem {
Label("Favorites", systemImage: "star")
}
//Set the tag
.tag(Tabs.favorites)
Text("ContactsView()")
.tabItem {
Label("Contacts", systemImage: "person")
}
//Set the tag
.tag(Tabs.contacts)
}.navigationTitle(selectedTab.rawValue.capitalized)
}
}
}
QUESTION
I have a fairly easy problem: I have an std::map
and another std::set
(can be std::vector
or similar too).
In the map I store items, and in the other container I'm storing favorites (of the map).
At some point, I'd need to retrieve (all) items from the map, but starting with the favorites defined by the other container.
Here is my minimal repro, I solved it very ugly, and ineffective:
...ANSWER
Answered 2021-Jun-06 at 22:01Both std::map
and std::set
use the same strict weak ordering for ordering its contents.
You can take advantage of this. You know that if you iterate over the map you will get the keys in the same order as they are in the set, therefore all it takes is a little bit of clever logic, something like:
QUESTION
How can I check if an id it's inside my firebase collection? I need to check if item.id it's inside the collection "favorites" that contains multiple ids.
I need to assign to a value true if it's inside or false if there is not a value with the same id.
...ANSWER
Answered 2021-Jun-04 at 15:27As far as I know, there is no way to "check" if a document exists inside a collection without actually fetching it. When you attempt to get
the document, it returns a doc
- with a exists
variable.
So you can check if a document exists or not like this (using Promises):
QUESTION
I'm trying to map through my state, where I have collected data from an external API.
However, when I do i get this error here: TypeError: this.state.stocks.map is not a function
I want to render the results to the frontend, through a function so that the site is dynamic to the state.favorites. Though the console.log(), I can see that the data is stored in the state.
I have found others with a similar issue, but the answers did not work out.
UPDATE: I have changed the componentDidMount() and it now produces an array. The issue is that I get no render from the renderTableData() functions.
console.log shows this array:
...ANSWER
Answered 2021-Jun-02 at 13:12I would say that this is happening because on the first render, the map looks into state.stock and it's an empty array. After the first render, the componentDidMount method is called fetching the data.
I would suggest to just wrap the map into a condition. If stock doesn't have any object, then return whatever you wish (null or a loader/spinner for example).
It's enough to add it like this for not returning anything in case the array is empty (it will be filled after the first render, but this is useful as well to return error message in case the fetch fails):
QUESTION
I am trying to return a list of recommended movies based on a client's favorite movies genres without including those that are already his favorites.
So, here is my Movie object
...ANSWER
Answered 2021-May-28 at 01:12First you could to exclude movies you alread have in the client list and then filter by genres combination
It works:
QUESTION
The app contains TabBar as well as BottomNavigationBar. When I tried to navigate within the body of tab bar view it navigates full screen.
This is the result I am trying to get when clicked on button- Expected Result
But I am getting this Current Output
Here I have attached the code-
...ANSWER
Answered 2021-Jun-02 at 22:27You can achieve this by creating a new Navigator
widget that sits somewhere under the main app navigator,
Here is test example:
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