binding – Tarik Billa

SwiftUI: Get notified when @Binding value changes

December 25, 2023 by Tarik

Use the onChange modifier instead of onAppear() to watch the textString binding. struct TypewriterTextView: View { @Binding var textString:String @State private var typingInterval = 0.3 @State private var typedString = “” var body: some View { Text(typedString).onChange(of: textString) { typedString = “” Timer.scheduledTimer(withTimeInterval: self.typingInterval, repeats: true, block: { timer in if self.typedString.length < self.textString.length { … Read more

SwiftUI @Binding update doesn’t refresh view

November 21, 2023 by Tarik

You have not misunderstood anything. A View using a @Binding will update when the underlying @State change, but the @State must be defined within the view hierarchy. (Else you could bind to a publisher) Below, I have changed the name of your ContentView to OriginalContentView and then I have defined the @State in the new … Read more

What is the difference between a wrapper, a binding, and a port?

August 22, 2023 by Tarik

A wrapper is a bit of code that sits on top of other code to recycle it’s functionality but with a different interface. This usually implies an interface written in the same language. It should also be noted that sometimes people will say wrapper when what they technically mean is a binding (myself included). Pros: … Read more

let and flet in emacs lisp

August 7, 2023 by Tarik

Unlike Scheme, Emacs Lisp is a 2-lisp, which means that each symbol has two separate bindings: the value binding and the function binding. In a function call (a b c d), the first symbol (a) is looked up using a function binding, the rest (b c d) are looked up using the value binding. Special … Read more

KnockoutJS binding when source is null/undefined

May 29, 2023 by Tarik

This page provides several solutions. The relevant part is this one: Protecting against null objects If you have an observable that contains an object and you want to bind to properties of that object, then you need to be careful if there is a chance that it can be null or undefined. You may write … Read more

Clojure keyword arguments

April 22, 2023 by Tarik

To update this answer for Clojure 1.2 there is now full keyword arg support with defaults provided by the map forms of destructuring binding: user> (defn foo [bar &{ :keys [baz quux] :or {baz “baz_default” quux “quux_default”}}] (list bar baz quux)) #’user/foo user> (foo 1 :quux 3) (1 “baz_default” 3)

Sublime Text 2 – key binding to change syntax

April 22, 2023 by Tarik

Use the following key combination to pull up the command palette: Ctrl+Shift+P then type: sshtml (for example, to set the syntax to HTML)

Bind jQuery UI autocomplete using .live()

March 10, 2023 by Tarik

jQuery UI autocomplete function automatically adds the class “ui-autocomplete-input” to the element. I’d recommend live binding the element on focus without the “ui-autocomplete-input” class to prevent re-binding on every keydown event within that element. $(“.foo:not(.ui-autocomplete-input)”).live(“focus”, function (event) { $(this).autocomplete(options); }); Edit My answer is now out of date since jQuery 1.7, see Nathan Strutz’s comment … Read more

react-native onPress binding with an argument

March 9, 2023 by Tarik

You can do the binding in the constructor by using ES6: export default class Nav extends Component { constructor(props) { super(props); this.onPress = this.onPress.bind(this); } and then onPress(txt) { console.log(txt); } render() { return ( <View> <Text>####################</Text> <Text>Intro Screen</Text> <Text>Number: {this.props.numbers}</Text> <TouchableHighlight onPress={() => this.onPress(‘foo’)}> <Text>Go to Foo</Text> </TouchableHighlight> </View> ); } }

Angular 2 output from router-outlet

March 3, 2023 by Tarik

<router-outlet></router-outlet> can’t be used to emit an event from the child component. One way to communicate between two components is to use a common service. Create a service shared-service.ts import { Observable } from “rxjs/Observable”; import { Injectable } from “@angular/core”; import { Subject } from “rxjs/Subject”; @Injectable() export class SharedService { // Observable string … Read more