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function with variable return value
f#

Suppose I have

let fx =
...
5, 3

if I write statement

let a, b = fx

I get
val b : int
val a : int

with a = 5 and b = 3

but if I write

let a = fx

I get
val a : int * int

where a is the tupple (5,3)

In fact I would with
let a = fx

get a = 5 and value 3 is assigned to optional value b if present

Possible?

.

Hi,

If you don't need the b value, I suggest you to write:

1

let a, _ = fx

or

1

let a = fst fx

If fx is a method, you can also overload it (but I don't recommend this solution) so that it returns either int or int*int, although it might require type annotations.

Laurent.

By on 6/7/2008 7:01 PM ()

ok

finally, I prefer use let a, b = fx and not use b value
also let a, _ = fx is good choice

thanks

By on 6/7/2008 7:16 PM ()

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