member
member-if
member-if-not
assoc
assoc-if
assoc-if-not
rassoc
rassoc-if
rassoc-if-not
count
count-if
count-if-not
find
find-if
find-if-not
position
position-if
position-if-not
every
some
notevery
notany
search
mismatch
getf
get-properties
ldiff
tailp