javascript - 使用函数扩展对象并引用当前对象

Question

鉴于我的对象:

obj = {}
obj['prop1'] = 1
obj['prop2'] = 2

如果我使用下划线和函数属性来扩展它，如下所示:

objHelper = {
              normalizeValue: function(somerules, myObj){
                /* .. some logic involving myObj and somerules*/
              }
        }

_.extend(obj, objHelper)

因此，当我在 obj 上调用该函数时，我会这样做:

obj.normalizeValue('somerule', obj);

所以我将 self 传递给对象方法，这看起来有点奇怪。有没有办法访问正在调用此方法的对象，即从上面的示例:

normalizeValue: function(somerules){
                    /* .. some logic involving myObj and somerules*/

                          var myObj = someMagicMethod();
                  }

Answer 1

Is there a way to access the object on which this method is being invoked on

是的，this keyword确实做到了这一点。

objHelper = {
    normalizeValue: function(somerules){
        /* .. some logic involving somerules and the target of the method call */
        var myObj = this;
    }
};