CODEWITHSUNDEEP
functionvectorclojure
Mauricio Estevez
Mauricio Estevez

Reputation: 417

How does mapcat work?

I am really new to clojure! How does `mapcat work?

Upvotes: 3

Views: 1405

Answers (1)

Leonid Beschastny
Leonid Beschastny

Reputation: 51500

mapcat function is just a shortcut for applying concat function to the result of map function:

=> (mapcat reverse [[3 2 1 0] [6 5 4] [9 8 7]])
(0 1 2 3 4 5 6 7 8 9)

=> (apply concat (map reverse [[3 2 1 0] [6 5 4] [9 8 7]]))
(0 1 2 3 4 5 6 7 8 9)

References:

By using mapcat in combination with vector function you can interlace several collections:

=> (mapcat vector [1 2 3 4 5 6] [:q :w :e :r :t :y])
(1 :q 2 :w 3 :e 4 :r 5 :t 6 :y)

You'll get the same result using list function instead of vector.

Upvotes: 8

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