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Lisp: nil and the empty list '() are equivalent and are falsey. C: 0 is falsey, the rest not.
by route66 16y ago
Lisp: nil and the empty list '() are equivalent and are falsey. C: 0 is falsey, the rest not.
- riffraff 16y agowhat i meant is that there are two falsey values, in lisp (I assume CL) I believe there is no different "false" value which is not equal to nil/empty list, I think?
- route66 16y agoYes, nil and '() are the same. Alas I'm of no more help for your quest. Also SQL with false and NULL does not it the picture as NULL means unknown and is treated as such , not as false ...