Stephen Tetley wrote:
On 3 July 2010 14:20, Andrew Coppin <andrewcop...@btinternet.com> wrote:
Tangentally, it seems to me that all monads can be described as doing zero
or more of:
- Invisibly pass state around (and possibly modify it).
- Perform unusual flow control.
- I/O (or some restricted subset of it).
Can anybody think of a monad that does something that doesn't fall under one
of these categories?
The Identity monad of course.
You did ask...
I said "does something that doesn't fall under one of these". The
identity monad, by contrast, does nothing that does fall under these.
:-P (It falls under zero of these.)
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