binding

问题 I am following a tutorial and it says ES modules uses live bindings. It means a feature to support cyclical dependencies. But I don't clearly understand this concept. What does this mean? 回答1: Live bindings is a concept introduced in ES modules. It means that when the exporting module changes a value, the change will be visible from the importer side. This is not the case for CommonJS modules. Module exports are copied in CommonJS. Hence importing modules cannot see changes happened on the

问题 I am following a tutorial and it says ES modules uses live bindings. It means a feature to support cyclical dependencies. But I don't clearly understand this concept. What does this mean? 回答1: Live bindings is a concept introduced in ES modules. It means that when the exporting module changes a value, the change will be visible from the importer side. This is not the case for CommonJS modules. Module exports are copied in CommonJS. Hence importing modules cannot see changes happened on the

问题 I am following a tutorial and it says ES modules uses live bindings. It means a feature to support cyclical dependencies. But I don't clearly understand this concept. What does this mean? 回答1: Live bindings is a concept introduced in ES modules. It means that when the exporting module changes a value, the change will be visible from the importer side. This is not the case for CommonJS modules. Module exports are copied in CommonJS. Hence importing modules cannot see changes happened on the

问题 I am writing a service based app with a bound service, and the service's onBind() method never seems to be called (testing it with Toasts and Logs). The service: import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.Context; import android.content.Intent; import android.location.Criteria; import android.location.Location; import android.location.LocationListener; import android.location

问题 I am writing a service based app with a bound service, and the service's onBind() method never seems to be called (testing it with Toasts and Logs). The service: import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.Context; import android.content.Intent; import android.location.Criteria; import android.location.Location; import android.location.LocationListener; import android.location

问题 I am writing a service based app with a bound service, and the service's onBind() method never seems to be called (testing it with Toasts and Logs). The service: import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.Context; import android.content.Intent; import android.location.Criteria; import android.location.Location; import android.location.LocationListener; import android.location

问题 I am trying to practice my binding. I want to make a window with two spinners and just get them to show the same value. The problem is that the binding is unreliable: the spinners seem to stop updating each other if they are clicked too fast. Both spinners still respond to clicking, and clicks are counted correctly on the spinner being clicked, but the other spinner stops updating and never recovers. And it doesn’t have to be very fast clicking at all to cause it. My code is based on this

问题 I have a question about how bindings work in WPF. If i have a viewmodel with a property like this: private string testString; public string TestString { get { return testString; } set { testString = value; } } Then if I bind it to a xaml with something like this: <TextBlock Text="{Binding Path=TestString, Mode=TwoWay}" Foreground="Red" HorizontalAlignment="Center" VerticalAlignment="Center" FontFamily="Calibri" FontSize="24" FontWeight="Bold"> </TextBlock> It works... Nothing new here.

问题 I feel like I'm missing something very basic, but this example SwiftUI code will not modify the view (despite the Binding updating) when the button is clicked Tutorials I have read suggest this is the correct way to use a binding and the view should refresh automatically import SwiftUI struct ContentView: View { @Binding var isSelected: Bool var body: some View { Button(action: { self.isSelected.toggle() }) { Text(isSelected ? "Selected" : "Not Selected") } } } struct ContentView_Previews:

问题 I feel like I'm missing something very basic, but this example SwiftUI code will not modify the view (despite the Binding updating) when the button is clicked Tutorials I have read suggest this is the correct way to use a binding and the view should refresh automatically import SwiftUI struct ContentView: View { @Binding var isSelected: Bool var body: some View { Button(action: { self.isSelected.toggle() }) { Text(isSelected ? "Selected" : "Not Selected") } } } struct ContentView_Previews: