'reject:' is originally from Smalltalk, along with 'collect:' (map), 'select:' (complement of reject), 'detect:' (first matching element), and 'inject:into:' (f

'reject:' is originally from Smalltalk, along with 'collect:' (map), 'select:' (complement of reject), 'detect:' (first matching element), and 'inject:into:' (foldl). I agree that these names are better -- they even rhyme so they're easier to remember!