工作中常常會創建一個函數來解決一些需求問題，以下是個人在工作中總結出來的創建函數20種方式，你知道多少？
function sayHello(){ console.log('hello');}function leave(){ console.log('goodbye');}//testsayHello();為完成需求，趕緊聲明一個函數吧
var sayHello = function(){ console.log('hello');}var leave = function(){ console.log('goodbye');}//testleave();有求必應，函數表達數來解決
var Action = { sayHello : function(){ console.log('hello'); }, leave : function(){ console.log('goodbye'); }}//testAction.sayHello();創建一個方法對象類看起來更整潔
var Action = function(){};Action.sayHello = function(){ console.log('hello');}Action.leave = function(){ console.log('goodbye');}//testAction.sayHello();為單體添加屬性方法，凈化命名空間
var Action = function(){ return { sayHello : function(){ console.log('hello'); }, leave : function(){ console.log('goodbye'); } }}// //testvar a = Action();a.leave();返回新對象我們還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();原型鏈指向防止創建多次
var Action = function(){};Action.prototype = { sayHello : function(){ console.log('hello'); }, leave : function(){ console.log('goodbye'); }}//testvar a = new Action();a.leave();對象賦給原型看上去更整潔
var Action = function(){ this.sayHello = function(){ console.log('hello'); } this.leave = function(){ console.log('goodbye'); }}//testvar a = new Action();a.leave();別忘了還可以在類的內部添加屬性
Function.prototype.sayHello = function(){ console.log('hello');}Function.prototype.leave = function(){ console.log('leave');}//testvar f = function(){};f.sayHello();基類原型拓展，新的一片空間
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();通用定義方法函數使用更方便
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();原形賦值我們還可以用類操作
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();鏈式操作有何不可
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+鏈式=更進一步
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();添加對象一次做得更多
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();函數式添加對象也可以鏈式操作
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();類的鏈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;}函數添加封裝一下
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;}類式添加追求的就是個性化
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();追求個性化，這么做不必說為什么
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