Mattias Campe wrote:
> Op 18-11-12 12:09, Martin Honnen schreef:
>> Most DOM collections are "live" collections so it is difficult iterating
>> over them while manipulating them. Your loop manipulates the class of
>> elements and that way the collection changes while the loop is executed
>> and that leads to elements being skipped as after setting
>> alleOpvallendeAlineas[0].className
>> that element is removed from the collection and the one that was at
>> index 1 is now at index 0. And the next loop iteration changes
>> alleOpvallendeAlineas[1]
>> which is the third element in the original collection.
>> One way to avoid that problem is working from the end of the collection
>> e.g.
>> for (var l = alleOpvallendeAlineas.length, i = l - 1; i >= 0; i--) {
>> alleOpvallendeAlineas[i].className = ...;
>> }
> I wouldn't have found that explanation myself, but it all makes sense,
> once you know that :). So it's not a bug in the JS-engine after all ;).
1. There is no such thing. Netscape/Mozilla JavaScript (e.g. in
Mozilla-based browsers, NES compatibles, B2G, and Firefox OS) is but one
of several ECMAScript implementations. Other major implementations
include JScript (e.g. in MSHTML/IE, with Windows Script Host, and on
IIS), V8 (e.g. in Chromium/Google Chrome, on Android, and as base of
node.js), Apple JavaScriptCore (e.g. in Safari, and on the iPhone/iPad),
Opera ECMAScript (in Opera and Opera Mobile), and KDE JavaScript (e.g.
in Konqueror):
<http://PointedEars.de/es-matrix> (to be updated)
Despite the historic name of the newsgroup, all of those implementations
are on-topic here and in similar newsgroups in other Usenet hierarchies.
2. The feature you are using here is not part of any ECMAScript
implementation to begin with, but of a language-independent DOM API.
You are merely using an implementation of that with ECMAScript
implementations:
<https://developer.mozilla.org/en/docs/DOM>
Scripting a DOM using an ECMAScript implementation is on-topic here as
well.
That said, next time you should be slow(er) to declare something a bug
without being sure, much less use the word "bug" that way in the message'
Subject:
<http://www.catb.org/~esr/faqs/smart-questions.html>,
in particular
<http://www.catb.org/~esr/faqs/smart-questions.html#idp29846432>.
HTH
PointedEars
--
Danny Goodman's books are out of date and teach practices that are
positively harmful for cross-browser scripting.
-- Richard Cornford, cljs, <cife6q$253$1$8300d...@news.demon.co.uk> (2004)
