easily re-implemented in Perl. It seems ...

  DB<33> sub trim { $_[1] //= qr/\s/; $_[0] =~ s/^[$_[1]]+|[$_[1]]+$//
+g }

  DB<34> $a = $b = "  \n . aaa . \n  "

  DB<35> trim $a

  DB<36> trim $b, " "

  DB<37> x $a,$b
0  '. aaa .'
1  '
 . aaa .
'
  DB<38>

[download]

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery

In reply to Re^3: How to trim a line from leading and trailing blanks without using regex or non-standard modules by LanX
in thread How to trim a line from leading and trailing blanks without using regex or non-standard modules by likbez

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