Javascript Delete Method?

Question

In this code snippet from AdvancED DOM Scripting:

The call to delete(classes[i]); is this an array or object method? I'm unable to Google an answer.

/**
 * 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;

I found this link relevant : openjs.com/articles/delete.php

Sid
– Sid

2011-12-16 19:06:14 +00:00
Commented Dec 16, 2011 at 19:06 — Sid
– Sid, Commented Dec 16, 2011 at 19:06

Phil Klein · Accepted Answer · 2011-12-16 19:14:39Z

2

The Mozilla Reference Docs says the following regarding the delete operator:

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

For more information, see the following article:

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

edited Dec 16, 2011 at 19:14

answered Dec 16, 2011 at 19:07

Phil Klein

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3 Comments

Phil Klein Over a year ago

@jondavidjohn LOL! It means that it can be used on objects, object properties, and array elements. Still not clear? perfectionkills.com/understanding-delete

jondavidjohn Over a year ago

yes, that's a top result in google, but "The delete operator deletes an object..." is a self reliant definition...

Wasabi Over a year ago

@Phil Klien.Thanks found the article mentioned, during your reply. Most serendipitous. To all, many thanks.

jondavidjohn · Accepted Answer · 2011-12-16 19:11:47Z

1

delete will set the value of the specified member (variable/array/object) to undefined

array/object example...

since classes[i] is actually referencing the i index of the array. It will set that specific index position to undefined, reserving the position in the array...

edited Dec 16, 2011 at 19:11

answered Dec 16, 2011 at 19:05

jondavidjohn

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Comments

themhz · Accepted Answer · 2011-12-16 19:08:50Z

0

I think you can use simply $('p').removeClass('myClass yourClass') with jquery and put together a function to do so for any element

answered Dec 16, 2011 at 19:08

themhz

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