properties – Tarik Billa

Getting element height

December 8, 2023 by Tarik

The correct way is to use @ViewChild() decorator: https://angular.io/docs/ts/latest/api/core/index/ViewChild-decorator.html Template: <div class=”view-main-screen” #mainScreen></div> Component: import { ElementRef, ViewChild } from ‘@angular/core’; export class viewApp{ @ViewChild(‘mainScreen’) elementView: ElementRef; viewHeight: number; constructor() { } clickMe(){ this.viewHeight = this.elementView.nativeElement.offsetHeight; } } That should do it but obviously you need to add your Component decorator. Edit: For Angular 8 … Read more

Vue component props without value

September 9, 2023 by Tarik

The key is to declare type of the prop as Boolean: props: { primary: Boolean } Then specifying only attribute name makes its value set to true. Working JSFiddle: https://jsfiddle.net/LukaszWiktor/gfa7gkdb/

How do you assign a QML Item to a component property in QML and then use that object inside the component?

August 28, 2023 by Tarik

There is much better solution: /* MyObject.qml */ Rectangle { default property alias data /* name can be any */ : inner_space.data /* … You can put other elements here … */ Item { id: inner_space /* … Params … */ } /* … You can put other elements here … */ } And now … Read more

Is there a didSet/willSet analog in Kotlin?

March 20, 2023 by Tarik

Although Kotlin doesn’t provide a built-in Swift-style solution for property changes observation, you can still do it in several ways depending on what your goal is. There is observable(…) delegate (in stdlib) that allows you to handle the property changes. Usage example: var foo: String by Delegates.observable(“bar”) { property, old, new -> println(“$property has changed … Read more

Options, Settings, Properties, Configuration, Preferences — when and why?

October 22, 2022 by Tarik

Tricky, this, as there’s no one single consistent style followed by all applications. As you say they are (broadly) synonyms. In truth it doesn’t really matter so long as your expected audience understands what you mean. The biggest difference is between Properties, which usually affect a component or object, and the others, which affect the … Read more

What is the difference between attribute and property? [closed]

October 19, 2022 by Tarik

In general terms (and in normal English usage) the terms mean the same thing. In the specific context of HTML / Javascript the terms get confused because the HTML representation of a DOM element has attributes (that being the term used in XML for the key/value pairs contained within a tag) but when represented as … Read more

Error in Swift class: Property not initialized at super.init call

October 8, 2022 by Tarik

Quote from The Swift Programming Language, which answers your question: “Swift’s compiler performs four helpful safety-checks to make sure that two-phase initialization is completed without error:” Safety check 1 “A designated initializer must ensure that all of the “properties introduced by its class are initialized before it delegates up to a superclass initializer.” Excerpt From: … Read more

Property initialization using “by lazy” vs. “lateinit”

September 17, 2022 by Tarik

Here are the significant differences between lateinit var and by lazy { … } delegated property: lazy { … } delegate can only be used for val properties, whereas lateinit can only be applied to vars, because it can’t be compiled to a final field, thus no immutability can be guaranteed; lateinit var has a … Read more