How to combine a map and replicate over an array of integers

Question

For a school exercise, I need to create a series of characters with a given array of numbers. given [3,3,2,1]output "+===+===+==+=+". My approach would be to use mapand replicate"=" in the array, then intercalate"+" and, finally, concatan array for one line.

My solution is something like this (with constant knee errors)

printLine arr = map (replicate "=") arr >>> intercalate '*' >>> concat

What is the correct syntax? or shouldn't i use the card at all?

Answer 1

you're on the right track, you just messed up the functions a bit:

• replicate n n-times ( , flip , )
• , , , Char String ('='VS "=") - ( :t intercalate Hoogle) : String ~ [Char]!
• intercalate , concat

:

eqSigns :: Int -> String
eqSigns n = replicate n '='

mixIn :: [Int] -> String
mixIn = intercalate "+" . map eqSigns

, ;)

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flip :

mixIn :: [Int] -> String
mixIn = intercalate "+" . map (flip replicate '=')

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PS: - ML/F #?