JavaScript 删除方法？

Question

在 AdvancED DOM 脚本中的代码片段中:

调用delete(classes[i]);这是数组还是对象方法？我无法通过 Google 搜索答案。

/**
 * remove a class from an element 
 */
function removeClassName(element, className) {
    if(!(element = $(element))) return false;
    var classes = getClassNames(element);
    var length = classes.length
    //loop through the array in reverse, deleting matching items
    // You loop in reverse as you're deleting items from 
    // the array which will shorten it.
    for (var i = length-1; i >= 0; i--) {
        if (classes[i] === className) { delete(classes[i]); }
    }
    element.className = classes.join(' ');
    return (length == classes.length ? false : true);
};
window['ADS']['removeClassName'] = removeClassName;

Answer 1

Mozilla 引用文档对删除运算符有以下说明:

The delete operator deletes an object, an object's property, or an element at a specified index in an array.

有关详细信息，请参阅以下文章:

http://perfectionkills.com/understanding-delete/