On Thu, 27 Dec 2007 11:10:21 +0200, Yitzchak Gale
On the other hand, functions are members of types that are just like any other Haskell type. They are first-class in that sense.
I guess that would apply to any typed language.
Like any type, only certain operations make sense on functions. Strings can be compared to each other for equality and written to a disk, and you can take the logarithm of a float, but none of those operations make sense for functions. In particular, two functions are equal only if they produce the same value for every input, and in general it is impossible for a computer to check that.
Yes, but one can store the result of an operation to disk except in the particular case the result happen to be a function. I'm not sure that in Haskell one can say that storing a value of some type to disk is an operation defined on that type. ________ Information from NOD32 ________ This message was checked by NOD32 Antivirus System for Linux Mail Servers. part000.txt - is OK http://www.eset.com