I've come to a point where I need to have some sort of rudimentary multiple inheritance happening in JavaScript. (I'm not here to discuss whether this is a good idea or not, so please kindly keep those comments to yourself.) I just want to know if anyone's attempted this with any (or not) success, and how they went about it. To boil it down, what I really need is to be able to ha
我已经到了需要在JavaScript中发生某种基本的多重继承的地步。 （我不是在这里讨论这是不是一个好主意，所以请将这些评论留给自己。） 我只想知道是否有人试图取得任何（或不）成功，以及他们如何去做。 为了解决这个问题，我真正需要的是能够拥有一个能够从多个原型链继承属性的对象（即每个原型可以拥有自己的链），但是按照给定的优先顺序（它会搜索链为了第一个定义）。 为了证明这在理论上是可能的，可以通过将次链
From http://www.jibbering.com/faq/faq_notes/closures.html : Note: ECMAScript defines an internal [[prototype]] property of the internal Object type. This property is not directly accessible with scripts, but it is the chain of objects referred to with the internal [[prototype]] property that is used in property accessor resolution; the object's prototype chain. A public prototype propert
来自http://www.jibbering.com/faq/faq_notes/closures.html： 注意：ECMAScript定义了内部对象类型的内部[[prototype]]属性。 这个属性不能用脚本直接访问，但是它是在属性访问器解析中使用的内部[[prototype]]属性引用的对象链; 该对象的原型链。 存在公共原型属性以允许与内部[[prototype]]属性关联的原型的分配，定义和操作。 ECMA 262（第3版）描述了两者之间的关系的细节，超出了本讨论的范围。 两者之间的关系细
This question already has an answer here: How to use a variable for a key in a JavaScript object literal? 7 answers 您需要先创建对象，然后使用[]进行设置。 var key = "happyCount"; var obj = {}; obj[key] = someValueArray; myArray.push(obj); Try something like this var yourObject = {}; yourObject[yourKey] = "yourValue"; console.log(yourObject ); example: var person = {}; var key = "name";
这个问题在这里已经有了答案： 如何在JavaScript对象文字中为键使用变量？ 7个答案 您需要先创建对象，然后使用[]进行设置。 var key = "happyCount"; var obj = {}; obj[key] = someValueArray; myArray.push(obj); 尝试这样的事情 var yourObject = {}; yourObject[yourKey] = "yourValue"; console.log(yourObject ); 例： var person = {}; var key = "name"; person[key] /* this is same as person.name */ = "J
Here is my object literal: var obj = {key1: value1, key2: value2}; How can I add {key3: value3} to the object? There are two ways to add new properties to an object: var obj = { key1: value1, key2: value2 }; Using dot notation: obj.key3 = "value3"; Using square bracket notation: obj["key3"] = "value3"; The first form is used when you know the name of the property. The second fo
这是我的对象文字： var obj = {key1: value1, key2: value2}; 我如何将{key3: value3}添加到对象？ 有两种方法可以将新属性添加到对象中： var obj = { key1: value1, key2: value2 }; 使用点符号： obj.key3 = "value3"; 使用方括号表示法： obj["key3"] = "value3"; 当你知道财产的名称时使用第一种形式。 第二种形式是在动态确定属性名称时使用的。 像这个例子一样： var getProperty = function (prope
I have a (nested) data structure containing objects and arrays. How can I extract the information, ie access a specific or multiple values (or keys)? For example: var data = { code: 42, items: [{ id: 1, name: 'foo' }, { id: 2, name: 'bar' }] }; How could I access the name of the second item in items ? Preliminaries JavaScript has only one d
我有一个（嵌套的）数据结构包含对象和数组。 我如何提取信息，即访问特定或多个值（或键）？ 例如： var data = { code: 42, items: [{ id: 1, name: 'foo' }, { id: 2, name: 'bar' }] }; 我怎么能访问name中的第二项的items ？ 预赛 JavaScript只有一个数据类型可以包含多个值： Object 。 数组是一种特殊的对象形式。 （普通）对象具有这种形式 {key: value, k
This question already has an answer here: Find object by id in an array of JavaScript objects 28 answers var result = jsObjects.filter(function( obj ) { return obj.b == 6; }); 查看Array.prototype.filter（）上的MDN Docs jsObjects.find(x => x.b === 6) From MDN: The find() method returns a value in the array, if an element in the array satisfies the provided testing function. Otherwise u
这个问题在这里已经有了答案： 通过JavaScript对象数组中的id查找对象28回答 var result = jsObjects.filter(function( obj ) { return obj.b == 6; }); 查看Array.prototype.filter（）上的MDN Docs jsObjects.find(x => x.b === 6) 来自MDN： 如果数组中的元素满足提供的测试函数，则find()方法返回数组中的值。 否则返回undefined 。 注意：老式浏览器（如IE）不支持像find()和arrow函数这样的方法，所以如果你
I have a global variable in JavaScript (actually a window property, but I don't think it matters) which was already populated by a previous script but I don't want another script that will run later to see its value or that it was even defined. I've put some_var = undefined and it works for the purpose of testing typeof some_var == "undefined" but I really do not think it&
我在JavaScript中有一个全局变量（实际上是一个window属性，但我不认为这很重要），它已经被以前的脚本填充了，但我不想让稍后运行的另一个脚本查看它的值或它是甚至定义。 我已经把some_var = undefined ，它用于测试typeof some_var == "undefined"的目的，但我真的不认为这是正确的方式去做。 你怎么看？ 我知道这是一条古老的线索，但选择的答案对我来说还不够清楚。 重点是删除操作从对象中移除一个属性
Say I create an object as follows: var myObject = { "ircEvent": "PRIVMSG", "method": "newURI", "regex": "^http://.*" }; What is the best way to remove the property regex to end up with new myObject as follows? var myObject = { "ircEvent": "PRIVMSG", "method": "newURI" }; Like this: delete myObject.regex; // or, delete myObject['regex']; // or, var prop = "regex"; delete m
假设我创建一个对象如下： var myObject = { "ircEvent": "PRIVMSG", "method": "newURI", "regex": "^http://.*" }; 如何删除属性regex最终以new myObject结束的最佳方式如下？ var myObject = { "ircEvent": "PRIVMSG", "method": "newURI" }; 喜欢这个： delete myObject.regex; // or, delete myObject['regex']; // or, var prop = "regex"; delete myObject[prop]; 演示 var myObject = {
I can't find any information on this issue; why doesn't the following code work in IE? window.x = 45; delete window.x; // or delete window['x']; IE reports an "object doesn't support this action" error. Does it have anything to do with that iterating over window properties in IE issue? 我会这样做： window[x] = undefined; try{ delete window[x]; }catch
我无法在这个问题上找到任何信息; 为什么下面的代码不能在IE中使用？ window.x = 45; delete window.x; // or delete window['x']; IE报告“对象不支持此操作”错误。 这与IE浏览器窗口属性的迭代有什么关系？ 我会这样做： window[x] = undefined; try{ delete window[x]; }catch(e){} 这有帮助吗？ window.x = 45; alert(window.x); window.x = null; 我在IE中试过这个，window.x确实有一个值，证明
I would like to disable and enable a div (inside a div i have two text box) on a single button click and i would like change the button name also like "if i click disable button it should disable the text box and disable name should become enable and vise verso".can some one help?. function san() { san1(document.getElementById("div1")); } function san1(el) { try { el.d
我想禁用和启用一个div（在一个div我有两个文本框）在一个单一的按钮点击，我想改变按钮的名称也像“如果我点击禁用按钮它应该禁用文本框和禁用名称应该成为启用和vise反面“。有人可以帮助吗？ function san() { san1(document.getElementById("div1")); } function san1(el) { try { el.disabled = el.disabled ? false : true; } catch (E) {} if (el.childNodes && el.childNodes.length >