67279 - [timeless] nothing is more empty than null :-) <pinkerton> i am

Status: VERIFIED INVALID

(Core :: JavaScript Engine, defect)

Description

[timeless]

that's a quote, and here's the math for it: 
javascript:([,].length<[,null].length)

The behavior of [,,,] is inconsistent among browsers.
javascript:[,].length
nc4.76 : 1
moz/xpcshell : 1
ie5.5 : 2
opera : 0

the logics are:
opera5.0: 0 [,] there's nothing there, so there's no length
moz/nc47: 1 [,] the last item does not exist.
 msie5.5: 2 [,] each item exists and affects ++length

xpcsh js>        [[,].length,[,null].length,[null,].length]
1,2,1
opera javascript:[[,].length,[,null].length,[null,].length]
0,2,2
ie5.5 javascript:[[,].length,[,null].length,[null,].length]
2,2,2
nc4.7 javascript:[[,].length,[,null].length,[null,].length]
1,2,1 

I haven't read the spec or tested nn2/nn3.  It's quite possible that we are 
right and that they are wrong, but i'd like that conclusion here in this bug so 
I can point to it.

Comment 1

[Brendan Eich [:brendan]]

Read the damn spec: http://www.mozilla.org/js/language/E262-3.pdf.  See 11.1.4,
pay attention to the production ArrayInitialiser : [ ElementList , ElisionOpt ]
and its semantics, then go file bugs on Opera and IE, for crying out loud.

/be

Comment 2

[Brendan Eich [:brendan]]

!

Comment 3

[Phil Schwartau]

Marking Verified Invalid - 

Comment 4

[timeless]

*** Bug 219308 has been marked as a duplicate of this bug. ***

Comment 5

[timeless]

fwiw opera7.02/7.20 results in 1,2,1
so that's one browser fixed

Comment 6

[Richard Brodie]

*** Bug 284064 has been marked as a duplicate of this bug. ***