Hi there,

I have a quickSort implementation, then I try to use :t in ghci to inspect what type I receive. I got this.

*Main> :t quickSort "Hello the world"

quickSort "Hello the world" :: [Char]

*Main> :t quickSort [3,2, 1,-10]

quickSort [3,2, 1,-10] :: (Num a, Ord a) => [a]

The first one looks like :t return type of output of quickSort [Char]

The second one looks like :t return the type of function (Num a, Ord a) => [a]

Anybody know why this happens? When we will receive type of output, or type of function? And why (Num a, Ord a) => [a], even quickSort doesn't have explicit type, so this type comes from input type and type of function is defined in runtime?

Thanks a lot!

Cheers,

Trung

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