How to convert a list of (Char,Int) to a string with the given number of repeated chars?

Question

How can I convert [(char,Int)] to a String of the Int in the second component gives the number of repetitions of the character in the first component? For examp

Answer 1

Hugs> map (\(c,n) -> replicate n c) [('a',9), ('b',10)]
["aaaaaaaaa","bbbbbbbbbb"]

or

map (uncurry $ flip replicate)