clojure.core/every-pred

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Type: function Added: Clojure 1.3 Examples: 3 Runnable: 2

([p] [p1 p2] [p1 p2 p3] [p1 p2 p3 & ps])

Takes a set of predicates and returns a function f that returns true if all of its composing predicates return a logical true value against all of its arguments, else it returns false. Note that f is short-circuiting in that it will stop execution on the first argument that triggers a logical false result against the original predicates.

Examples

by devn on 2012-04-26 ▶

((every-pred number? odd?) 3 9 11) true

by daveliepmann on 2019-02-11 . May have evaluation errors. ▶

(filter (every-pred pos? ratio?) [0 2/3 -2/3 1/4 -1/10 5 3/3]) => (2/3 1/4)

by daveliepmann on 2019-02-11 ▶

((every-pred string? (comp (partial > 5) count)) "abc") true ((every-pred string? (comp (partial > 5) count)) "abcdef") false

Note by harold

Careful--every predicate with no arguments is considered true:

user> ((every-pred (constantly false)))
true
user> ((every-pred (constantly false)) 1)
false

See also

• clojure.core/some-fn (2)
• clojure.core/every? (3)

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