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[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
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[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
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newlispfanclub.alh.net • View topic - implicit indexing on empty string

implicit indexing on empty string

Q&A's, tips, howto's

implicit indexing on empty string

Postby jef » Mon Oct 13, 2014 7:51 pm

I'm surprised that implicit indexing doesn't raise an error
on an empty string (when called with 0 or -1), while it
does on an empty list:

> ("" 0)
""

> ("" -1)
""

With another index, we get an error as expected:
> ("" 1)

ERR: invalid string index

If we compare to implicit indexing on an empty list, we always
get an error:

> ('() 0)

ERR: invalid list index

>('() -1)

ERR: invalid list index

Any explanation for this?

(btw, thanks again Lutz, newLISP is a real pleasure to use)
jef
 
Posts: 11
Joined: Sun May 18, 2014 8:42 am

Re: implicit indexing on empty string

Postby Lutz » Tue Oct 14, 2014 7:38 am

Lutz
 
Posts: 5279
Joined: Thu Sep 26, 2002 4:45 pm
Location: Pasadena, California

Re: implicit indexing on empty string

Postby jef » Tue Oct 14, 2014 6:46 pm

jef
 
Posts: 11
Joined: Sun May 18, 2014 8:42 am


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