315048 - Array.map generic doesn't iterate through XMLList object

Status: RESOLVED WONTFIX

(Core :: JavaScript Engine, enhancement)

Description

[Jason Davis]

User-Agent:       Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8) Gecko/20051026 Camino/1.0+
Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.9a1) Gecko/20051102 Firefox/1.6a1

The Array.map shorthand only works for objects which expose a .length property. XMLList() has a .length() method, and therefore cannot be "mapped" without writing your own map() method. __defineGetter__ on the prototype cannot be used as a workaround either, as it could conflict with possible <length/> xml markup.

Ideally Array.map should look for a .length() method if a .length property is not found, or at least make an exception for XMLList inputs.

Reproducible: Always

Steps to Reproduce:
1. Click on associated javascript: uri 

Actual Results:  
Empty alert box

Expected Results:  
Alert box containing "a,b,c"

Comment 1

[Brendan Eich [:brendan]]

This is an E4X design flaw.  Something to fix for Edition 4.

/be

Comment 2

[Tom S [:evilpie]]

We shouldn't mess with ES5 defined stuff.