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JSでDelegateオブジェクト

Last updated at Posted at 2015-03-10

JavaScriptにはクラスないので、オブジェクトでよいかしら。

var Delegate = {

   /**
    * 委譲オブジェクトを作成する。
    * @param scope
    * @param method
    * @returns {Function}
    */
   create:function(scope, method){
       var obj =  function(){
           return method.apply(scope, arguments);
       }
       return obj;
   }
}

使い方はこんな感じで。

var Test = function(){
	this.name = "テストです。";
}

Test.prototype = {
	say: function(){
		console.log(this.name);
	}
}

var test = new Test();
var obj = {};
obj.func = Delegate.create(test, test.say);
obj.func(); // "テストです。"

スコープがずれるときは、これで解決。

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