clojure.core/seq?

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Type: function Added: Clojure 1.0 Examples: 3 Runnable: 2

([x])

Return true if x implements ISeq

Examples

by gstamp on 2010-10-12 ▶

(seq? 1) false (seq? [1]) false (seq? (seq [1])) true

by gregginca on 2012-04-10 ▶

;; contrast to example code for sequential? ;; You may also find this useful: https://insideclojure.org/2015/01/02/sequences ;; (seq? '(1 2 3)) true (seq? #{1 2 3}) false (seq? [1 2 3]) ; for sequential?, returns true false (seq? (range 1 5)) true (seq? 1) false (seq? {:a 2 :b 1}) false

by yochannah on 2017-02-01 . May have evaluation errors. ▶

;; Don't use seq? when you want to check for a vector. ;; you may have intended to use seq instead (def x [:a :b :c]) #'cljs.user/x (if (seq x) "Seq ok" "No Seqing here") "Seq ok" (if (seq? x) "Seq ok" "No Seqing here") "No Seqing here"

See also

• clojure.core/seq (5)
• clojure.core/sequential? (1)
• clojure.core/vector? (2)
• clojure.core/coll? (4)
• clojure.core/list? (2)
• clojure.core/map? (1)
• clojure.core/set?
• clojure.core/seqable? (0)

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