* Mark Spezzano mark.spezz...@chariot.net.au [2010-10-30 15:37:30+1030]
Can somebody please explain exactly how the monad functions sequence
and sequence_ are meant to work?
The others in this thread have already explained how these functions
work, so I'll just give an example how they are
Hi,
Can somebody please explain exactly how the monad functions sequence and
sequence_ are meant to work?
I have almost every Haskell textbook, but there's surprisingly little
information in them about the two functions.
From what I can gather, sequence and sequence_ behave differently
The expression
sequence [a,b,c,...]
is roughly equivalent to
do
r_a - a
r_b - b
r_c - c
...
return [r_a,r_b,r_c,...]
The expression
sequence_ [a,b,c,...]
is roughly equivalent to
do
a
b
c
...
