Notes (OFVB 03/31): Case by Case
Okay, so since copy-pasting into a REPL is no fun, I’m going to quickly flip forward to the section “Loading a Program from a File”:
Save the file in same directory (folder) as you enter OCaml from, under the name
lists.ml:# #use "lists.ml";;We can then tell OCaml to use the contents of that file like this: It is exactly the same as typing it in manually […] Errors and warnings will be reported as usual. Note that the #use command is not part of the OCaml language for expressions – it is just a command we are giving to OCaml.
One thing to add is that unlike in Haskell, we can’t put our type signatures in the same file. Apparently, there’s a separate “interface file” with a .mli extension, but I won’t worry about that yet.
Questions
4
Easier to read pattern matching, since doesn’t require nested if statements.
5
Evaluates to 5