Beefy Boxes and Bandwidth Generously Provided by pair Networks
Welcome to the Monastery
 
PerlMonks  

Comment on

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

One very nice feature of Perl that can help here (which of course is why it’s here ...) is called autovivification:   “to come to life automatically.”   It lets you write code like this:

$$usercounts{$name} += $howmany; ...
(or equivalently: $usercounts->{$name} += $howmany; ...)

... and simply not have to worry about whether the hashref $usercounts already contains an entry for $name.   If it does, cool.   But if it doesn’t, an entry is automagically created for you with an initial value of zero (because Perl knows that you’re going to add something to it).   Then, either way, the addition operation happens and life is good.

One of the things that I definitely like about this language is its pragmatism.   It’s a tool for the job, designed and built by people who had a job to do.   Maybe in a few cases it tips a bit too far in the name of “DWIM = Do What I Mean,” but generally it’s both powerful and expressive, both in a practical way.


In reply to Re: parsing help required by sundialsvc4
in thread parsing help required by ghosh123

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!
  • 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
  • Outside of code tags, you may need to use entities for some characters:
            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 perusing the Monastery: (9)
    As of 2014-12-22 00:46 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      Is guessing a good strategy for surviving in the IT business?





      Results (110 votes), past polls