partition

function

since v0.0-927

clojure.core/partition

Edit

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Details:

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See Also:

• partition-all
• split-at
• partition-by

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Source docstring:

Returns a lazy sequence of lists of n items each, at offsets step
apart. If step is not supplied, defaults to n, i.e. the partitions
do not overlap. If a pad collection is supplied, use its elements as
necessary to complete last partition up to n items. In case there are
not enough padding elements, return a partition with less than n items.

(defn partition
  ([n coll]
     (partition n n coll))
  ([n step coll]
     (lazy-seq
       (when-let [s (seq coll)]
         (let [p (take n s)]
           (when (== n (count p))
             (cons p (partition n step (drop step s))))))))
  ([n step pad coll]
     (lazy-seq
       (when-let [s (seq coll)]
         (let [p (take n s)]
           (if (== n (count p))
             (cons p (partition n step pad (drop step s)))
             (list (take n (concat p pad)))))))))

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