From: internetletter@... (s moon)
Date: 2003-06-27T22:46:35+09:00
Subject: \s in regex

what I want is to remove beginning and trailing spaces from lines.

this is a failed try.

ifile.each { | line |
  ofile.print line.sub(/^\s+/,"").sub(/\s+$/,"")
}

this removes spaces from begin and end of lines
but it also removes blank lines.
it seems \s matches \r or \n also.


this is another one, this time it works.

ifile.each { | line |
  if line =~ /^\s*$/   # take care of blank lines
    ofile.print line
  else
    ofile.print line.sub(/^\s+/,"").sub(/\s+$/,"")
  end
}

but can i do this with one line without if-then-else?

thanks