DavidSzczesniak
4/6/2018 - 1:51 PM

Regexes - Alternatives

The veritcal bar/pipe/or can be used to provide a choice between matches. If one part of the pattern fails, the part of the right gets a chance to match.

regex_alt.pl
content_copyfile_download
\!h # Basic Example:

foreach (qw(fred betty barney dino)) {
  if (/fred|barney/) {
    print "$_ matched\n" # this would return both names, because both are matching
  }
}

\!h # Different example - make your pattern case insensitive

$_ = "Bamm-Bamm";
if (/Bamm-?(B|b)amm/) {
  print "The string has Bamm-Bamm\n";
}

# Now the second 'bamm' can can start lower or uppercase