flatten

function

since v0.0-927

clojure.core/flatten

Edit

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Details:

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Source docstring:

Takes any nested combination of sequential things (lists, vectors,
etc.) and returns their contents as a single, flat sequence.
(flatten nil) returns nil.

(defn flatten
  [x]
  (filter #(not (sequential? %))
          (rest (tree-seq sequential? seq x))))

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