As long as we're getting silly ... 

  $s &= ~' ';

[download]
(Warning: may not work for non-7-bit-ASCII letters such as accented characters, Cyrillic characters, or anything in EBCDIC. Or even any characters that aren't actually letters. But it is fun to do.)

In reply to Re^3: Replacing a character in a string by Tanktalus
in thread Replacing a character in a string by cool_jr256

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