# 99 questions/Solutions/15

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< 99 questions | Solutions(Difference between revisions)

Line 9: | Line 9: | ||

<haskell> | <haskell> | ||

repli = flip $ concatMap . replicate | repli = flip $ concatMap . replicate | ||

+ | </haskell> | ||

+ | |||

+ | alternatively, without using the <hask>replicate</hask> function: | ||

+ | <haskell> | ||

+ | repli :: [a] -> Int -> [a] | ||

+ | repli xs n = concatMap (take n . repeat) xs | ||

</haskell> | </haskell> |

## Revision as of 22:28, 20 December 2010

(**) Replicate the elements of a list a given number of times.

repli :: [a] -> Int -> [a] repli xs n = concatMap (replicate n) xs

or, in Pointfree style:

repli = flip $ concatMap . replicate

replicate

repli :: [a] -> Int -> [a] repli xs n = concatMap (take n . repeat) xs