1. createWrap:function(wrapper,scope,args, appendArgs){ 2. var _method = this; 3. return function() { 4. var allArgs = Array.prototype.slice.call(arguments, 0); 5. return wrapper.apply(scope||this, 6. [method.createDelegate(scope||this, args, appendArgs)].concat(allArgs)); 7. }...
但这里不是介绍Function的特性,而是考量Function函数的扩展, 比较Mootools1.2,Prototype1.6,Ext2.02中对Function函数的扩展,分析在构建新的类库时,怎样扩展 Function函数。 Function.prototype有两个特有用,使用频率极高的两个函数,一是 function.apply(thisArg[, argsArray]);,二是fun.call(thisArg[, arg1[, arg2[...
arguments); }; temp.wrap = function(callback){ var prev = fn; fn = function(){ return callback.apply(prev,arguments); }; }; return temp; }; var html = function(str){ //原函数数 return ""+str+""; } alert(html("段落")); var p = wrapper(html);//第一次包装 alert(p("段...
Now change these functions into a pure function as explained in Listing 1-11.let function1 = (input,global) => { // works on input //changes global global = "somethingElse" } let function2 = (global) => { if(global === "something") { //business logic } } Listing 1-11纯函数这...
1.11.3.min.js"type="text/javascript"charset="utf-8">$.extend({log:function(msg){console.log(msg);alert(msg);}});$.log("这是日志");$.constructor.prototype.info=function(msg){console.log(msg);alert(msg);};$.info("这是消息"); 结果: 1.1.2、扩展对象与深拷贝 用一个或多个其他对象...
And we wrap the original function with before and after function we defined in Function.prototype: var log_time = function( func, log_name) { return func = ( function() { var d; return func.before( function(){ d = new Date(); }).after( function(){ console.log( log_name + ( ...
on(event, wrapFun); return this; } } 164、一道常被人轻视的前端 JS 面试题 代码语言:javascript 代码运行次数:0 运行 AI代码解释 function Foo() { getName = function() { alert(1); }; return this; } Foo.getName = function() { alert(2); }; Foo.prototype.getName = function() { ...
export default function createStorage(){ if(!storageInstance){ storageInstance = new Storage(); } return storageInstance; } 原型模式 在JavaScript中原型模式是很常见的,JavaScript中实现的继承或者叫委托也许更合适,因为它不等同于如Java等语言中的继承,毕竟JavaScript的继承是基于原型(prototype)来实现. ...
从本质上讲,Proxy 提供了一种为对象的基本操作定制行为的方法。将其视为中间人,位于代码和对象之间,拦截并可能改变对象的交互方式。允许开发人员为读取属...
// We reference p1.getFullName, *NOT* p1.prototype.getFullName,// since p1.prototype does not exist:p1.getFullName =function(){return'I am anonymous'; } Nowp1has its owngetFullNameproperty. But thep2instance (created in our earlier example) doesnothave any such property of its ...