I am having a little trouble following the two discussions on pattern
guards and monads, due to some (probably minor) confusing pieces of
syntax. Would anyone like to clarify these for me? It would help me
to understand the underlying issues. Thanks.
On pattern guards, Simon PJ writes:
Now, for monads, Phil Wadler writes a law:
m = \x - k x ++ h x = m = k ++ n = k
in which 'h' appears on the lhs but not the rhs, and 'n' on the rhs but
not the lhs. ... perhaps the equation should read as follows?
m = \x - k x ++ h x = m = k ++ m = h
Yes, of course it
