Haskell list difference operator in F#

Question

Is there an equivalent operator to Haskell's list difference operator \\ in F#?

Answer 1

Nope... Just write it and make it an infix operator --using the set of special characters. // will work as an infix operator, for example, but not \\. See the manual:

infix-op :=

or || & && <OP >OP $OP = |OP &OP ^OP :: -OP +OP *OP /OP %OP

**OP

prefix-op :=

!OP ?OP ~OP -OP +OP % %% & &&

Answer 2

Just convert the lists to sets using the built-in set function and then use the built-in - operator:

set xs - set ys

For example:

> set [1..5] - set [2..4];;
val it : Set<int> = seq [1; 5]