Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl-Sensitive Sunglasses
 
PerlMonks  

Comment on

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

  • Well, for one you do not link your file or file handle in any way to the declaration of the hash. How shall Perl know that you want to apply those expressions to the contents of your file?
  • Also, regular expression matching is done using the m// operator or /regexp/. Nowhere you tell Perl that you expect matching.
  • Thirdly, you need to use capture groups (...) in regular expressions to retrieve information.
  • And then you need to loop some how over the lines of your file or apply the regexes repeatedly in some way.
If you put these points into action, it could look like the code below. I am reading from the DATA handle for convenience and read all lines into an unnamed array.

use strict; use warnings; my %hash = map { /(TCONS_00[0-9]+)\s+(XLOC_[0-9]+)/ } <DATA>; my @keys= keys %hash; my @values= values %hash; print "@keys\n"; print "@values\n"; __DATA__ TCONS_00000047 XLOC_000039 TCONS_00000718 XLOC_000456 TCONS_00000938 XLOC_000610 TCONS_00004086 XLOC_002872 TCONS_00004252 XLOC_003003 TCONS_00004975 XLOC_003624 TCONS_00004976 XLOC_003624 TCONS_00005492 XLOC_004020

In reply to Re: create hashes using regex by hdb
in thread create hashes using regex by bingalee

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 chilling in the Monastery: (5)
    As of 2014-12-18 02:39 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

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





      Results (41 votes), past polls