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isLower is not in the Prelude (the automatically imported module built-in functions). Here's the list of all functions in Prelude:
isLower is in another module. You can figure that out by searching for "isLower" on Hoogle:
You can even find it by searching for it by type, which is useful if you don't remember the precise name. Try searching for "Char -> Bool".
In other words, you'll need to import isLower from somewhere before you can use it.
On Sun, Mar 2, 2014 at 10:45 AM, Roelof Wobben <r.wobben@home.nl> wrote:
Hello,
I try to selfstudy haskell by following the yet another haskell tutorial.
Now I have the exercise where I have a string and have to convert it into a list of Booleans based on lower cats letter using map.
So i tried this
x = "aBCde".islower:[]
But I see this error : Not in Scope: 'isLower'.
Where do I make my error.
Do not give the answer otherwise I do not learn anything from it.
Roelof
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