工作中常常会创建一个函数来解决一些需求问题,以下是个人在工作中总结出来的创建函数20种方式,你知道多少?
function sayHello(){console.log("hello");}function leave(){console.log("goodbye");}//testsayHello();为完成需求,赶紧声明一个函数吧
var sayHello = function(){console.log("hello");}var leave = function(){console.log("goodbye");}//testleave();有求必应,函数表达数来解决
var Action = {sayHello : function(){console.log("hello");},leave : function(){console.log("goodbye");}}//testAction.sayHello();创建一个方法对象类看起来更整洁
var Action = function(){};Action.sayHello = function(){console.log("hello");}Action.leave = function(){console.log("goodbye");}//testAction.sayHello();为单体添加属性方法,净化命名空间
var Action = function(){return {sayHello : function(){console.log("hello");},leave : function(){console.log("goodbye");}}}// //testvar a = Action();a.leave();返回新对象我们还有更多的事情可以做
var Action = function(){};Action.prototype.sayHello = function(){console.log("hello");}Action.prototype.leave = function(){console.log("goodbye");}//testvar a = new Action();a.sayHello();原型链指向防止创建多次
var Action = function(){};Action.prototype = {sayHello : function(){console.log("hello");},leave : function(){console.log("goodbye");}}//testvar a = new Action();a.leave();对象赋给原型看上去更整洁
var Action = function(){this.sayHello = function(){console.log("hello");}this.leave = function(){console.log("goodbye");}}//testvar a = new Action();a.leave();别忘了还可以在类的内部添加属性
Function.prototype.sayHello = function(){console.log("hello");}Function.prototype.leave = function(){console.log("leave");}//testvar f = function(){};f.sayHello();基类原型拓展,新的一片空间
Function.prototype.addMethod = function(name, fn){this[name] = fn;}var methods = function(){};methods.addMethod("sayHello", function(){console.log("hello");});methods.addMethod("leave", function(){console.log("leave");});//testmethods.sayHello();通用定义方法函数使用更方便
Function.prototype.addMethod = function(name, fn){this.prototype[name] = fn;}var Methods = function(){};Methods.addMethod("sayHello", function(){console.log("hello");});Methods.addMethod("leave", function(){console.log("leave");});//testvar a = new Methods();a.leave();原形赋值我们还可以用类操作
Function.prototype.addMethod = function(name, fn){this[name] = fn;return this;}var methods = function(){};methods.addMethod("sayHello", function(){console.log("hello");}).addMethod("leave", function(){console.log("leave");});//testmethods.leave();链式操作有何不可
Function.prototype.addMethod = function(name, fn){this.prototype[name] = fn;return this;}var Methods = function(){};Methods.addMethod("sayHello", function(){console.log("hello");}).addMethod("leave", function(){console.log("leave");});//testvar a = new Methods();a.leave();原型+链式=更进一步
Function.prototype.addMethod = function(obj){for(var key in obj){this[key] = obj[key];}}var methods = function(){};methods.addMethod({sayHello : function(){console.log("hello");},leave : function(){console.log("goodbye");}});//testmethods.leave();添加对象一次做得更多
Function.prototype.addMethod = function(obj){for(var key in obj){this.prototype[key] = obj[key];}}var Methods = function(){};Methods.addMethod({sayHello : function(){console.log("hello");},leave : function(){console.log("goodbye");}});//testvar a = new Methods();a.leave();原型有什么不可以
Function.prototype.addMethod = function(obj){for(var key in obj){this[key] = obj[key];}return this;}var methods = function(){};methods.addMethod({sayHello : function(){console.log("hello");}}).addMethod({leave : function(){console.log("goodbye");}});//testmethods.leave();函数式添加对象也可以链式操作
Function.prototype.addMethod = function(obj){for(var key in obj){this.prototype[key] = obj[key];}return this;}var Methods = function(){};Methods.addMethod({sayHello : function(){console.log("hello");}}).addMethod({leave : function(){console.log("goodbye");}});//testvar a = new Methods();a.leave();类的链式操作也可以做得更多
Function.prototype.addMethod = function(){if(arguments.length < 1)return;var tostring = Object.prototype.toString;if(tostring.call(arguments[0]) === "[object Object]"){for(var key in arguments[0]){this[key] = arguments[0][key];}}else if(typeof arguments[0] === "string" && tostring.call(arguments[1]) === "[object Function]"){this[arguments[0]] = arguments[1];}return this;}函数添加封装一下
Function.prototype.addMethod = function(){if(arguments.length < 1)return;var tostring = Object.prototype.toString;if(tostring.call(arguments[0]) === "[object Object]"){for(var key in arguments[0]){this.prototype[key] = arguments[0][key];}}else if(typeof arguments[0] === "string" && tostring.call(arguments[1]) === "[object Function]"){this.prototype[arguments[0]] = arguments[1];}return this;}类式添加追求的就是个性化
Function.prototype.addMethod = function(){if(arguments.length < 1)return;var cout = 0,tostring = Object.prototype.toString,that;if(typeof arguments[0] === "boolean" && arguments[0]){cout++;that = this;}else{that = this.prototype;}if(tostring.call(arguments[cout]) === "[object Object]"){for(var key in arguments[cout]){that[key] = arguments[cout][key];}}else if(typeof arguments[cout] === "string" && tostring.call(arguments[cout + 1]) === "[object Function]"){that[arguments[cout]] = arguments[cout + 1];}return this;}//textvar Text1 = function(){};Text1.addMethod("sayHello", function(){console.log("last say hello!")}).addMethod("leave", function(){console.log("last goodbye!")});var t = new Text1();t.sayHello();t.leave();var test2 = function(){};test2.addMethod(true, "sayHello", function(){console.log("last say hello!")}).addMethod(true, "leave", function(){console.log("last goodbye!")});test2.sayHello();test2.leave();追求个性化,这么做不必说为什么
以上所述就是本文的全部内容了,希望大家能够喜欢。