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What general tips do you have for golfing in Common Lisp? I'm looking for ideas which can be applied to code-golf problems and which are also at least somewhat specific to Common Lisp (e.g. "remove comments" is not an answer).
Please post one tip per answer.
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Use ' (quote) as synonym for "" for single words.
Quote stops evaluation of symbol, allowing you to e.g. print it. Note that the casing is dependant on *print-case* variable (most of the time it's in the upcase).
(print"yes")
(print'yes) ; saved a byte!
Use looping constructs that are as short as possible - loop for is rarely the way to go:
(dotimes(i <number>)) to loop a certain number of times(mapcan lambda list) to map a list(mapcar lambda list) to map and flatten a list(do((var1 initialvalue1 nextvalue1)(var2 initialvalue2 nextvalue2)...)((endcondition)returnvalue)) for more complex loops(map'string body list) to map string -> string(map nil body list) to iterate over a list
