Clojure Programming/Examples/API Examples/Predicate functions
drop-while
[edit | edit source]user=> (drop-while pos? [1 2 3 -1 -2 3 4])
(-1 -2 3 4)
filter
[edit | edit source]user=> (filter nil? [:a :b nil nil :a])
(nil nil)
user=> (filter (fn[x](= x :b)) [:a :b nil nil :a])
(:b)
not-any?
[edit | edit source]user=> (not-any? neg? [1 2 3 4 5])
true
user=> (not-any? neg? [1 2 3 -4 5])
false
remove
[edit | edit source]user=> (remove nil? [:a :b nil nil :a])
(:a :b :a)
every?
[edit | edit source]user=> (every? pos? [1 2 3 4])
true
user=> (every? pos? [0 1 2 3])
false
some
[edit | edit source]user=> (some neg? [0 1 2 -3 4])
true
user=> (some #{:gamma} [:professor :gamma])
:gamma