While I was looking at regex to reverse string, I thought about re-inventing the reverse function with regex only. So I wrote routine:
sub rev ($) {
$_ = shift;
s/^(.)(.*)$/swap($2)."$1"/e if (length>1);
# print "in swap: $_\n";
return $_;
}
This does not work. For instance, if I feed asdfghjkl;', I get back ';;lkjhgfds. It appears to me $1 and $2 are overwritten at each level of recusion, although these should be localized. Am I missing something here?
Update: I meant to type:
sub rev ($) {
$_ = shift;
s/^(.)(.*)$/rev($2)."$1"/e if (length>1);
# print "in rev: $_\n";
return $_;
}
Update at author's req. - dvergin 2003-08-31
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