3 ms·

It was later thought that one better writes (remove-if (complement #'prime-p) ...) and not (remove-if-not #'prime-p ...) and thus REMOVE-IF-NOT was

by lispm 11y ago

It was later thought that one better writes (remove-if (complement #'prime-p) ...) and not (remove-if-not #'prime-p ...) and thus REMOVE-IF-NOT was deprecated in the ANSI CL standard.