note 55842 deleted from language.operators.bitwise by victor

Note Submitter: kit dot lester at lycos dot co dot uk ---- A C/assembler trick I use a lot -- $x^=$y; $y^=%x; $x^=$y; will exchange the (integer) contents of $x and $y without needing an intermediate temporary variable (the intermediate-temporary-variable method also takes three assignments...). Draw the truth-tables of this if you don't believe it! [In assembler days, this was known as "the treble-xor swap".] Enjoy!