Tutorial by Examples: binding

List comprehensions can introduce local bindings for variables to hold some interim values: [(x,y) | x <- [1..4], let y=x*x+1, even y] -- [(1,2),(3,10)] Same effect can be achieved with a trick, [(x,y) | x <- [1..4], y <- [x*x+1], even y] -- [(1,2),(3,10)] The let in list compr...

Ruby keeps track of local variables and self variable via an object called binding. We can get binding of a scope with calling Kernel#binding and evaluate string inside a binding via Binding#eval. b = proc do local_variable = :local binding end.call b.eval "local_variable" #=&gt...

Many bugs in knockout data binds are caused by undefined properties in a viewmodel. Knockout has two handy methods to retrieve the binding context of an HTML element: // Returns the binding context to which an HTMLElement is bound ko.contextFor(element); // Returns the viewmodel to which ...

Name binding is a concept that allows to say to a JAX-RS runtime that a specific filter or interceptor will be executed only for a specific resource method. When a filter or an interceptor is limited only to a specific resource method we say that it is name-bound. Filters and interceptors that do no...

With the bind command it is possible to define custom key bindings. The next example bind an Alt + w to >/dev/null 2>&1: bind '"\ew"':"\" >/dev/null 2>&1\"" If you want to execute the line immediately add \C-m (Enter) to it: bind '"\ew&quo...

Here is a generic ViewHolder class that you can use with any DataBinding layout. Here an instance of particular ViewDataBinding class is created using the inflated View object and DataBindingUtil utility class. import android.databinding.DataBindingUtil; import android.support.v7.widget.RecyclerVi...

Observable.combineLatest(firstName.rx_text, lastName.rx_text) { $0 + " " + $1 } .map { "Greetings, \($0)" } .bindTo(greetingLabel.rx_text) Using the combineLatest operator every time an item is emitted by either of two Observables, combine the latest item emitted by each Obs...

Newtonsoft's Json.NET allows you to bind json dynamically (using ExpandoObject / Dynamic objects) without the need to create the type explicitly. Serialization dynamic jsonObject = new ExpandoObject(); jsonObject.Title = "Merchent of Venice"; jsonObject.Author = "William Shakes...

Sometimes we need to perform basic operations like hide/show view based on single value, for that single variable we cannot create model or it is not good practice to create model for that. DataBinding supports basic datatypes to perform those oprations. <layout xmlns:android="http://schema...

When making a bind of something, for example a date you may want to show it in a specific format without messing around with it in the code. To do this we can use the StringFormat property. Here are some examples: Text="{Binding Path=ReleaseDate, StringFormat=dddd dd MMMM yyyy}" This...

Emacs' documentation uses a consistent notation for all key bindings, which is explained here: Key chords A "key chord" is obtained by pressing two or more keys simultaneously. Key chords are denoted by separating all keys by dashes (-). They usually involve modifier keys, which are put ...

You can bind event listeners to the EventSource object to listen to different events channels using the .addEventListener method. EventSource.addEventListener(name: String, callback: Function, [options]) name: The name related to the name of the channel the server is emitting events to. callb...

<bindings > <wsHttpBinding > <binding name="mybinding" > <security mode="Transport" > <transport clientCredentialType="Basic"/ > </security > </binding > </wsHttpBinding > </bindings > ...

Binding a Swift Library in Xamarin.iOS follows the same process for Objective-C as shown in https://developer.xamarin.com/guides/ios/advanced_topics/binding_objective-c/, but with some caveats. A swift class must inherit from NSObject to be binded. Swift compiler will translate class and protoco...

Pass in a literal value (not an object), such as a string or number. Child scope gets his own value, if it updates the value, parent scope has his own old value (child scope can't modify the parens scope value). When parent scope value is changed, child scope value will be changed as well. All int...

Passing in a value by reference, you want to share the value between both scopes and manipulate them from both scopes. You should not use {{...}} for interpolation. <two-way text="'Simple text.'" <!-- 'Simple text.' --> simple-value="123" <!-- 123 Note, is...

Pass a method into a directive. It provides a way to execute an expression in the context of the parent scope. Method will be executed in the scope of the parent, you may pass some parameters from the child scope there. You should not use {{...}} for interpolation. When you use & in a directi...

angular.component("SampleComponent", { bindings: { title: '@', movies: '<', reservation: "=", processReservation: "&" } }); Here we have all binding elements. @ indicates that we need a very basic binding, from the parent scope ...

public void doSomething() { DialogTestBinding binding = DataBindingUtil .inflate(LayoutInflater.from(context), R.layout.dialog_test, null, false); Dialog dialog = new Dialog(context); dialog.setContentView(binding.getRoot()); dialog.show(); }

When using instances of QML files by directly declaring them, every property creates a binding. This is explained in the above examples. This is how you dynamically create components: var component = Qt.createComponent("Popup.qml"); var popup = component.createObject(parent, {"widt...