cps tweak, another Seasoned cite

[lambda.git] / state_monad_tutorial.mdwn

diff --git a/state_monad_tutorial.mdwn b/state_monad_tutorial.mdwn
index bac9124..b15ac29 100644 (file)
--- a/state_monad_tutorial.mdwn
+++ b/state_monad_tutorial.mdwn
@@ -95,13 +95,13 @@ If we wanted to work with one of the encapsulation techniques described above, w
 
 Here is how you'd have to do it using our OCaml monad library:
 
-       # use "path/to/monads.ml";;
+       # #use "path/to/monads.ml";;
        # module S = State_monad(struct type store = store' end);;
        # let increment_store'' : ('x,'a) S.m =
                S.(get >>= fun cur ->
                   let value = cur.total
-                  in let s = { total = succ cur.total; modifications = succ cur.modifications }
-           in put s >> unit value);;
+                  in let s' = { total = succ cur.total; modifications = succ cur.modifications }
+           in put s' >> unit value);;
 
 Let's try it out:
 
@@ -134,7 +134,7 @@ or, using pattern-matching on the record (you don't have to specify every field
        let { total = value; _ } = s0
        in (value, { total = s0.total + 2; modifications = s0.modifications + 2};;
 
-But **the point of learning how to do this monadically** is that (1) monads show us how to embed more sophisticated programming techniques, such as imperative state and continuations, into frameworks that don't natively possess them (such as the set-theoretic metalanguage of Groenendijk, Stockhof and Veltman's paper); and (2) monads are delicious.
+But **the point of learning how to do this monadically** is that (1) monads show us how to embed more sophisticated programming techniques, such as imperative state and continuations, into frameworks that don't natively possess them (such as the set-theoretic metalanguage of Groenendijk, Stokhof and Veltman's paper); (2) becoming familiar with monads will enable you to see patterns you'd otherwise miss, and implement some seemingly complex computations using the same simple patterns (same-fringe is an example); and finally, of course (3) monads are delicious.
 
 Keep in mind that the final result of a bind chain doesn't have to be the same type as the starting value:
 
@@ -170,7 +170,7 @@ What are the special-purpose operations that the `State_monad` module defines fo
 
                ... >> put new_store >> fun () -> ...
 
-       As that code snippets suggests, the boxed value after the application of `puts new_store` is just `()`. If you want to preserve the existing boxed value but replace the store, do this:
+       As that code snippet suggests, the boxed value after the application of `puts new_store` is just `()`. If you want to preserve the existing boxed value but replace the store, do this:
 
                ... >>= fun value -> put new_store >> unit value >>= ...