[Haskell] Undefined of Char.toUpper ?
mykeyboard at 21cn.com
Wed Apr 27 04:54:30 EDT 2005
I am a beginer of the haskell language and study it from <<Yet Another
Haskell Tutarial>> of Hal Daume III.
Example from the tutarial:
Prelude> map Char.toUpper "Hello World"
I try it on Hugs for windows32, compile error:
ERROR - Undefined qualified variable "Char.toUpper"
Could anybody tell me what's the matter with it?
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