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From Odwiki

This one of the odWiki CustomExpressions which uses PERL to return a substitution of a RegularExpression

string ExpRegSub(string source; string from; string to;)
{
  string perlstr = "";
  perlstr = "echo '" + source + "' | perl -pe 's/" + from + "/" + to + "/g'";
  return system(perlstr);
}

e.g.

hscript> echo `~ExpRegSub("hello","ll","foobar")`
hefoobaro

credit: AntioneDurr