Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling
 
PerlMonks  

comment on

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

despite the many shortcuts perl offers the lazy programmer via the $_ variable by using it as a default argument in many functions, I realized that I could wrest even more optimization from perl by glomming this function onto common math operations!

For instance, if you're writing a quickie script to do some tallying, you might have line after line of $_+=10;
$_+=$n;
and so on. No more with the ARGHelper. turn $_+=20 into +=20 and $_++ into the delightful ++! that's a savings of half your keystrokes right there! Handles ++, --, and all op= operators!

In case you're still having difficulty, here's a sample script :

#! perl -l use ARGHelper; $_=10; +=2; **=2; print;
package ARGHelper; use Filter::Simple; FILTER_ONLY code => sub { my $nl = qr/(\n?;\n?)|&&|\|\|/sm; s/($nl)\s*?--\s*?($nl)/$1\$_--$2/smg; s/($nl)\s*?\+\+\s*?($nl)/$1\$_++$2/smg; print; my @ops = ('**=', '+=', '*=', '&=', '<<=', '&&=', '-=', '/=', '|=', '>>=', '||=', '.=', '%=', '^=', 'x='); foreach my $op (@ops) { my $qo = quotemeta $op; s/($nl)\s*?$qo/$1\$_$op/smg; } } ; return 1;

In reply to helping along $_ by boo_radley

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?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others wandering the Monastery: (8)
    As of 2019-06-25 13:32 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      Is there a future for codeless software?



      Results (106 votes). Check out past polls.

      Notices?