[Haskell-cafe] Newbie question on Haskell type

[Huong Nguyen]

Hi all,
 I want to write a small functionto test whether an input is a String or
not. For example,
 isString::(Show a) =>a ->Bool
This function will return True if the input is a string and return False if
not
 Any of you have idea about that? Thanks in advance
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