Beefy Boxes and Bandwidth Generously Provided by pair Networks
go ahead... be a heretic

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
I recommend Regexp::Assemble for something like this. An example:
use warnings; use strict; use Regexp::Assemble; my @keywords = qw( a an the then that this ); my $key_rea = Regexp::Assemble->new; $key_rea->add($_) for @keywords; my $key_re = $key_rea->re; my $data = do { undef $/; <DATA> }; print "$1\n" while $data =~ m/(\b$key_re\b)/g; __DATA__ hello everyone, i had been trying to make a lexical analyzer for c, wh +ere all the keywords were to be inputted in a text file keywords. thi +s i stored in an array. but this process is not being automated. the +code i wrote is as follows :- ... the keywords file contains:- auto continue enum if short break switch +volatile default extern int signed typedef while case do float long s +izeof union char double for register static unsigned const else goto +return struct void

In reply to Re: how to automate the regular expression match from a file? by eff_i_g
in thread how to automate the regular expression match from a file? by vikashiiitdm

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?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others romping around the Monastery: (2)
    As of 2017-07-27 01:21 GMT
    Find Nodes?
      Voting Booth?
      I came, I saw, I ...

      Results (402 votes). Check out past polls.