mootools可变范围 [英] mootools variable scope

问题描述

如何访问外部函数的参数"parent"? 请查看代码中的注释 !!
最后这个问题有误导作用，我的问题是由错误的输入参数引起的

how to access outer function's argument 'parent' ??? please see comments in code !!
last edit : This question is misleading, my problem is caused by wrong input argument

renderData : function(parent, children){
            children.each(function(e, index){
                var li = new Element('li');
                var hasChildren = false;
                if(e.children && e.children.length >0){
                    var img = new Element('img');
                    img.src = 'a1.png';
                    img.inject(li);
                    hasChildren = true;
                }
                if(e.icon){
                    var img = new Element('img');
                    img.src = e.icon;
                    img.inject(li);
                }else{
                    var img = new Element('img');
                    img.src = 'b1.png';
                    img.inject(li);
                }
                li.set('html',e.text);
                console.log(this);
                     // how to access outer function's argument 'parent' ???
                li.inject(parent);
                if(hasChildren){
                    var ul = new Element('ul');
                    this.renderData(ul, e.childRen);
                    ul.inject(e);
                }
            }.bind(this));

推荐答案

在每个循环中:

array.each(function(el) {
    this.method(); // this == (instance / scope)
}, this); // where **this** is your parent scope.

另一种可接受的方式是:

another acceptable way is:

var self = this;
...
array.each(function(el) {
    self.method(); // fine.
}); // where this is your parent scope.

http://mootools.net/docs/core/Types/Array#Array:Array-each

尽管，使用.bind(this)应该也可以...... http://www.jsfiddle.net /dimitar/fFy4J/-那是什么问题?

although, using .bind(this) should work too... http://www.jsfiddle.net/dimitar/fFy4J/ - so what is the problem?

这篇关于mootools可变范围的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！