Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?
 
PerlMonks  

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

Right...I think. If I need to use the value of $_ in a nested loop, I'd just assign it to another variable:

for (0 .. 10) { my $outer_elem = $_; for (0 .. 20) { my $inner_elem = $_; do_something($outer_elem, $inner_elem); } } # Yeah, I know doing this is better: for my $outer_elem (0 .. 10) { for my $inner_elem (0 .. 20) { do_something($outer_elem, $inner_elem); } }

So I guess the loop counter would just keep a count of the most immediate loop it's in. I don't really know--this is all just how I would expect such a variable to work (if it existed).

So if we pretend $. is the loop counter:

foreach my $elem1 (@array1) { my $outer_idx = $.; foreach my $elem2 (@array2) { my $inner_idx = $.; # Blablabla... } }

I should emphasize: I'm not pushing for this to become a feature or anything. I was just curious if there was anything like this (and this is how I would imagine it might work if there was).


In reply to Re^5: Perlplexation - foreach shoulda Known by Riales
in thread Perlplexation - foreach shoulda Known by raybies

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • 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:
    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
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    [ambrus]: (It might be easier to use the callback scalar as a guard, as in $c and &$c(); $c = ();)
    [Corion]: ambrus: Hurr - yes, that might happen, as Prima will queue lots of stuff (Well, Windows will)
    [Corion]: But I'm really amazed that it just took this little code (plus the idle handler I have in mind and something else dk suggested)
    [Corion]: ambrus: I wrote the handler so that it stops the timer if it's supposed to be a one-shot
    [Discipulus]: are you using Prima Corion? good morning Corion and ambrus, btw

    How do I use this? | Other CB clients
    Other Users?
    Others surveying the Monastery: (9)
    As of 2016-12-09 09:03 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      On a regular basis, I'm most likely to spy upon:













      Results (150 votes). Check out past polls.