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var add = function(a,b){
return a + b;
};
var myObject = {
value:3,
getValue:function(){
return this.value;
}
};
myObject.double = function(){
var that = this;
var helper = function (){
//add·½·¨ÄÚµØthisÖ¸Ïòwindow¶ÔÏó£¬Ó¦¸ÃËãÊÇjavascriptÉè¼Æ´íÎó
//ËùÒÔÕâÀïÓÃÒ»¸ö¾Ö²¿±äÁ¿Ö¸ÏòÄÚ²¿·½·¨²ÎÊý
that.value = add(that.value,that.value);
};
helper();
};
myObject.double();
document.writeln(myObject.getValue());
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