prototypal-inheritance

Object.create vs new in terms of prototype inheritance

由 守給你的承諾、 提交于 2019-12-12 21:26:58
问题 I have searched a lot about it but I couldn't find any direct answer to it Why we can't access prototype property/method of an object created using Object.create() but we can using new keyword? Let us consider a constructor function Greeting as follows: function Greeting() { } Greeting.prototype.byeBye = function(){ console.log("Have a good day!") } Now I create an object from this constructor using Object.create() method var Stanley = Object.create(Greeting) console.log(Stanley.byeBye())

JS prototype objects not inherited?

由 跟風遠走 提交于 2019-12-12 16:19:09
问题 My question is about a strange output that I came across while playing with JS prototypal inheritance. Please take a look: function Parent(){ } Parent.prototype = { variable : 'a' }; function Child(){ } Child.prototype = new Parent(); child = new Child(); Parent.prototype = { variable : 'c' }; console.log(child.variable); // output a console.log(child.__proto__); // [object Object] { variable: 'a'} Why the child did not inherit property? Of course if I would do this this way: function Parent(

How to inherit from base provider (not the provider factory)?

由 自古美人都是妖i 提交于 2019-12-12 03:00:24
问题 Say I have this base provider: angular.module('app').provider('BaseClient', function () { this.setSomething = function (something) { // Store `something` somewhere return this; }; }); And now these 2 other sub-providers: angular.module('app').provider('ClientA', function () { this.$get = function () { return { foo: function () { console.log('FOO', /* Read `something`, needs to output 'aaa' */); } } }; }); angular.module('app').provider('ClientB', function () { this.$get = function () { return

Use ng-model in nested Angularjs controller

由 孤街醉人 提交于 2019-12-11 12:54:39
问题 I have two nested controller in angularjs, and want to use ng-model from outer in inner controller. Suppose this <div ng-controller='outController'> // data.Name : from outer controller <div ng-controller='innerController'> <input type="text" ng-model='name' ng-init='name=data.Name'> {{data.Name}} // display this scope value </div> </div> data.Name value display in html page but not bind to name ng-model. How to bind this value to inner ng-model? 回答1: You should follow dot rule in this case,

what is the use of prototype property in javascript? [duplicate]

由 为君一笑 提交于 2019-12-11 11:03:08
问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: How does JavaScript .prototype work? What is the use of prototype property when properties can be added to object even without it? var o = {}; o.x = 5; o.y = test; test = new function(){ alert("hello"); }; 回答1: Adding a method / property to a prototype is adding it to all objects with that prototype in their prototype chain. Your code is adding a method/property to a single instance. To make use of prototypes

Angular: when using ng-include, number variable become NaN [duplicate]

由 て烟熏妆下的殇ゞ 提交于 2019-12-11 10:48:09
问题 This question already has answers here : What are the nuances of scope prototypal / prototypical inheritance in AngularJS? (3 answers) Closed 4 years ago . I have a problem when i try to fragment my html with ng-include: This is what my index.html page looks like when it works (prix=price, TVA=tax): <!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <link type="text/css" rel="stylesheet" href="style.css" /> <title> TVA </title> </head> <body> <div> <div ng-app="app" ng-controller="appCtrl

Angular: Dependency Injection with prototypal inheritance

由 雨燕双飞 提交于 2019-12-11 10:44:01
问题 According to Todd Motto's styleguide, Controllers chapter: Inheritance : Use prototypal inheritance when extending controller classes I try to implement it in my controllers: function BaseController(){ 'use strict'; this._path = ''; this._restService = undefined; } /** * Boring JSDocs */ BaseController.prototype.getById = function(id) { return this._restService.getById(this._path, id); }; TagModalController.prototype = Object.create(BaseController.prototype); /** * Even more boring JSDocs */

Call prototype's overridden method which then calls the next prototype's overridden method error

由 随声附和 提交于 2019-12-11 09:51:35
问题 I'm trying to override methods of an object but still call the prototype's original method using Object.getPrototypeOf() . This works great the first time, but if the method is overridden more than once there are problems. This code results in a stack overflow: A = { blurg: function() { puts('hey there') } } B = (function buildB(){ var obj = Object.create(A) obj.blurg = function() { Object.getPrototypeOf(this).blurg.apply(this, arguments) puts('hai!!!!') } return obj })() b = (function buildb

Javascript Prototypal inheritance with Multiple Objects

由 五迷三道 提交于 2019-12-11 07:43:55
问题 Say I have 5 Objects Callback Perishable Object1 Object2 Object3 Object1 needs to extend the Callback but not the Perishable object, whereas Object 2 should extend both and Object 3 should extend Perishable but not callback. I know this works... Object1.prototype = new Callback(); Object3.prototype = new Perishable(); but how would I do something like (I know this isnt working) Object2.prototype = new Callback() && new Perishable(); 回答1: If you don't want any external dependencies, you can

Code re-use through Javascript Prototypal inheritance

由 我怕爱的太早我们不能终老 提交于 2019-12-11 07:00:49
问题 I'm a bit confused with how to achieve code re-use with the prototypal inheritance. I'm following the example at http://alexsexton.com/?p=51 where it create a Speaker object and bridge it with jQuery. Say I want a new speaker that is similar to the one in example, but now with a extra sound file. The only code I can think of is like: var AnotherSpeaker = Object.create(Speaker); $.extend(true, AnotherSpeaker, { init: function(options, elem){ this.options.soundFile = options.soundFile || this
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