Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling

comment on

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

The following subroutine returns its argument with any leading newlines removed:

sub xxx { my $s = shift; $s =~ s/^\n+//; $s; }
However, if this function is called from the replacement part of a s///em, the /m semantics is carried over, and internal newlines will be deleted.
#!/usr/bin/perl use strict; use warnings; no warnings qw /syntax/; use Test::More tests => 1; # # Delete any leading newlines. # sub xxx { my $s = shift; $s =~ s/^\n+//; $s; } my $a = "A\n\nB"; $a =~ s/([\s\w]+)/xxx $1/e; my $b = "A\n\nB"; $b =~ s/([\s\w]+)/xxx $1/em; is ($b, $a); __END__ 1..1 not ok 1 # Failed test (eep at line 21) # got: 'A # B' # expected: 'A # # B' # Looks like you failed 1 test of 1.

"Keep pouring your ideas"

2006-10-07 Unapproved by planetscape once evidence of habitual plagiarism uncovered.

In reply to s/PATTERN/func()/em leaks /m into func() by jesuashok

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 the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others musing on the Monastery: (8)
    As of 2020-05-27 10:44 GMT
    Find Nodes?
      Voting Booth?
      If programming languages were movie genres, Perl would be:

      Results (154 votes). Check out past polls.