You seem to be editing your post continuously, I hope by the time I submit this the snippet in question won't be outdated... although you seem to be adding to your examples, not modifying (apparently you're working on 1,001 ways to write a loop)
In example #2:
$a[$_] -= $b[$_] for (),0..$#a;
# ^-- ... why?
What is up with the stray ()
? Just a typo, or are you doing something else here (I thought you might be somehow forcing list context, but 0..$#a
is a list anyway).
Without the spare empty list, the expression evaluates equivalently in my perl (5.10.0).
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||