Beefy Boxes and Bandwidth Generously Provided by pair Networks vroom
good chemistry is complicated,
and a little bit messy -LW
 
PerlMonks  

Comment on

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

Rather than getting bogged down with alternating between the start and end strings and then doing a repeat substitution, just capture the middle bit and tag a '?' on either end. This works with the sample string you provided:

$ perl -Mstrict -Mwarnings -E ' my $string = "---------xxxxxxxxxxxxxxx------yyyyyyyyyyyyyy-------- +"; $string =~ s/^-*(.*?)-*$/?$1?/; say $string; ' ?xxxxxxxxxxxxxxx------yyyyyyyyyyyyyy?

Update: Actually, that may not be what you want at all!

I read:

  • "replace all characters ..." [plural] "... with another character" [singular]
  • "The output is: ?xxxxxxxxxxxxxxx------yyyyyyyyyyyyyy?" [wanted output]
  • "replace ever - ..." [plural] "... with an ?" [singular]

So, assuming I've completely misinterpreted your question, I'd recommend ++rjt's solution. However, if you still wanted something without alternations or repeating, you could use this:

$ perl -Mstrict -Mwarnings -E ' my $string = "---------xxxxxxxxxxxxxxx------yyyyyyyyyyyyyy-------- +"; $string =~ s/^(-*)(.*?)(-*)$/"?" x length($1) . $2 . "?" x length( +$3)/e; say $string; ' ?????????xxxxxxxxxxxxxxx------yyyyyyyyyyyyyy????????

-- Ken


In reply to Re: What is wrong here (Replacing Strin pieces) by kcott
in thread What is wrong here (Replacing Strin pieces) by Anonymous Monk

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: (7)
    As of 2014-04-19 05:51 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      April first is:







      Results (478 votes), past polls