Please read Writeup Formatting Tips, in particular the part about code tags (<c>). You'd probably also benefit from reading How (Not) To Ask A Question, in this case because showing some sample strings and their transformations would avoid ambiguity in meaning.

Good references on dealing with regular expressions are in perlre and perlretut. Assuming you've read the string "/question Hello, how are you? /reply I'm fine." into $string and want to change that to " Hello, how are you? I'm fine.", you could use the code:

$string =~ s/\/\S+//g;

This will remove all occurrences of a forward slash (\/) followed by all characters which are not white space (\S+), removing such elements as \question, \reply, \45sa%%df2, .... The g tells the engine to match repeatedly.

In reply to Re: removing characters using regex by kennethk
in thread removing characters using regex by nirali

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, details, 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, summary, 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.