Re^2: CGI.pm - multiple values for same field name

Nit -

$INPUT->param("titles")
returns a list. You can't index a list, but you can slice it.
($INPUT->param("titles"))[5]

Sure you can - perldata uses subscript instead of index:

A common way to access an array or a hash is one scalar element at a time. You can also subscript a list to get a single element from it.

You can't subscript a function call, though, only its results - that's why the expression must go in parens. But you are right in that you can also slice a list :-)

--shmem

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}

Comment on Re^2: CGI.pm - multiple values for same field name Select or Download Code

Replies are listed 'Best First'.
Re^3: CGI.pm - multiple values for same field name by ikegami (Patriarch) on May 25, 2007 at 15:09 UTC
A common way to access an array or a hash is one scalar element at a time. You can also subscript a list to get a single element from it. And by doing so, you get a list slice. A single-index slice is still a slice. The difference between a slice and indexing is the context in which the index expression is evaluated. `my @indexes = (3); my @array = (0,1,2,3,4); print($array[@indexes], "\n"); # 1 => index print(@array[@indexes], "\n"); # 3 => slice print((0,1,2,3,4,5)[@indexes], "\n"); # 3 => slice` [download] There's no native syntax to index a list.	[reply] [d/l]
Re^4: CGI.pm - multiple values for same field name by shmem (Chancellor) on May 25, 2007 at 15:30 UTC
The difference between a slice and indexing is the context in which the index expression is evaluated. I see. That's why this sentence is found under Slices in perldata. Learnt something new today, thank you. update: looks like a statement like this one deserves downvoting for some. shrug --shmem _($_=" "x(1<<5)."?\n".q·/)Oo. G°\ / /\_¯/(q / ---------------------------- \__(m.====·.(_("always off the crowd"))."· ");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}	[reply]