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LISP variable exchange

Tags:

lisp

common-lisp

How can I exchange two variables in LISP without using a third variable?

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Johan Kotlinski Avatar asked Feb 09 '09 22:02

Johan Kotlinski

2 Answers

(rotatef a b)
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ayrnieu Avatar answered Oct 14 '22 10:10

ayrnieu

Also:

(let ((a b) (b a)) ...)

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Michael H. Avatar answered Oct 14 '22 12:10

Michael H.
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