You have to use ;
to separate expressions:
e1 ; e2
This performs the side-effects in e1
and discards the result, and then evaluates `e2.
So in your case:
let x = myFun y in
Hashtbl.iter (...) ... ;
let z = myFun x in
...
Pergunta
I'm a beginner in OCaml, and i have a problem with series of let, like:
let x = myFun y in
let z = myFun x in
...
But, between the lets, i use Hashtbl.iter and other functions that returns unit. If i do:
let x = myFun y in
Hashtbl.iter (...) ...
let z = myFun x in
...
The compiler raises an error. But, if i do:
let x = myFun y in
let h = Hashtbl.iter (...) ...
let z = myFun x in
...
The compiler don't raise any error, just warnings showing that "h" is never used. What's the best way to do that without any problem? Thanks.
Solução
You have to use ;
to separate expressions:
e1 ; e2
This performs the side-effects in e1
and discards the result, and then evaluates `e2.
So in your case:
let x = myFun y in
Hashtbl.iter (...) ... ;
let z = myFun x in
...
Outras dicas
Note that you can write
let x = ... in
let _ = Hashtbl.iter in ...