9
2
Inspired from the assortment of other 'Tips for golfing in language xyz'. As usual, please only suggest tips that are specific to OCaml and not programming in general. One tip per answer please.
9
2
Inspired from the assortment of other 'Tips for golfing in language xyz'. As usual, please only suggest tips that are specific to OCaml and not programming in general. One tip per answer please.
3
let rec f=function[]->0|_::t->1+f t
is shorter than
let rec f x=match x with[]->0|_::t->1+f t
2
This:
begin […] end
is always synonymous with this:
([…])
1
Thanks to tuples, you can define several variables at once. And as functions are first-class citizens…:
let f,g=(fun x->x+1),fun x->2*x
You can’t, however, write:
let f,g=(fun x->x+1),fun x->2*f x
Error: Unbound value f
Unfortunately, you can’t avoid the issue by using rec
:
let rec f,g=(fun x->x+1),fun x->2*f x
Error: Only variables are allowed as left-hand side of
let rec
1
Functions in OCaml are curryied. It might be useful to exploit that fact sometimes.
let n y=f x y
can be written
let n=f x
If you need arithmetic operations, you can surround them with parentheses so they behave like standard, prefix functions. (+)
, (-)
, …
let n=(+)1;;
n 3;;
- : int = 4
1Mind if I add a few obvious tips? – Édouard – 2015-09-28T23:39:43.977