clojure.core/vector

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Type: function Added: Clojure 1.0 Examples: 6 Runnable: 3

([] [a] [a b] [a b c] [a b c d] [a b c d e] [a b c d e f] [a b c d e f & args])

Creates a new vector containing the args.

Examples

by gstamp on 2010-08-16 . May have evaluation errors. ▶

;; create an empty vector the long way (vector) [] ;; create an empty vector the short way [] [] ;; you can even create vectors with nil values (vector nil) [nil] ;; create a vector the long way (vector 1 2 3) [1 2 3] ;; create a vector the short way [1 2 3] [1 2 3] ;; checking for the 2 results above (class (vector 1 2 3)) clojure.lang.PersistentVector (class [1 2 3]) clojure.lang.PersistentVector (= (vector 1 2 3) [1 2 3]) true

by belun on 2010-09-26 . May have evaluation errors. ▶

;; Destructuring with a vector, inside a "let" form, a simple case (a symbol ;; for each element): ;; destructuring with an inline vector (let [[first-element second-element third-element fourth-element] [10 20 30 40]] (str "first=" first-element " second=" second-element " third=" third-element " fourth=" fourth-element)) "first=10 second=20 third=30 fourth=40" ;; notice how 4 symbols were created pointing to the scalars 10, 20, 30 and 40 ;; destructuring with a symbol to a vector (def my-vector [1 2 3 4]) #'user/my-vector (let [[first-element second-element third-element fourth-element] my-vector] (str "first=" first-element " second=" second-element " third=" third-element " fourth=" fourth-element)) "first=1 second=2 third=3 fourth=4"

by belun on 2010-09-26 . May have evaluation errors. ▶

;; Destructuring with a vector, inside a "let" form, more complex cases: (let [[first-element second-element & the-rest] my-vector] (str "first=" first-element " second=" second-element " the-rest=" the-rest)) "first=1 second=2 the-rest=(3 4)" ;; notice how "the-rest" is a sequence (let [[first-element second-element third-element fourth-element :as everything] my-vector] (str "first=" first-element " second=" second-element " third=" third-element " fourth=" fourth-element " everything=" everything)) "first=1 second=2 third=3 fourth=4 everything=[1 2 3 4]" ;; notice how "everything" is the whole vector

by alvarogarcia7 on 2016-02-27 ▶

;; Create pairs from a seq ;; (1 2 3 4) -> ([1 2] [2 3] [3 4]) (def inp (list 1 2 3 4)) ;; (1 2 3 4) (map vector inp (drop 1 inp)) ;; ([1 2] [2 3] [3 4])

by abhishekamralkar on 2018-12-31 ▶

;; Vectors in Clojure are heterogeneous (def my-vector [1 "a" :b]) my-vector [1 "a" :b]

by dijonkitchen on 2020-04-23 ▶

(vector {:a 1 :b 2 :c 3}) ;; [{:a 1, :b 2, :c 3}] (vec {:a 1 :b 2 :c 3}) ;; [[:a 1] [:b 2] [:c 3]]

See also

• clojure.core/vec (1)
• clojure.core/vector? (2)
• clojure.core/vector-of
• clojure.core/pop (2)
• clojure.core/into (9)

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