Back to Questions
936
views3
comments
What is the difference?
f#

Is there any difference between [b]xa[/b] and [b]xb[/b]?

1
2
3
4
5
6
7
8
9

type MyType(n: int) =

    member x.Display() = printfn "%d" n


let xa = MyType(314)

let xb = new MyType(314)
.

No. Or, more specifically, they are two distinct objects, but both ways of calling the constructor (with or without 'new') are equivalent here.

By on 9/5/2008 5:58 PM ()

No.  Or, more specifically, they are two distinct objects, but both ways of calling the constructor (with or without 'new') are equivalent here.

Thanks. Is there any scenario where both ways aren't equivalent?

By on 9/5/2008 6:14 PM ()

Hi yashez,

  • You must use "new" if the identifier is a type abbreviation, e.g. "new string(...)". This is to avoid ambiguities with existing function names.
  • If you use "new" with a generic type you must give a generic instantiation for that type, e.g. "new Foo<_,_>(...)"

Thanks

Don

By on 9/5/2008 6:21 PM ()

    Topic tags

    IntelliFactory Offices Copyright (c) 2011-2012 IntelliFactory. All rights reserved.
    Home | Products | Consulting | Trainings | Blogs | Jobs | Contact Us | Terms of Use | Privacy Policy | Cookie Policy     		Built with WebSharper