Re: [Haskell-cafe] Is () a 0-length tuple?

2009/11/7 Pasqualino "Titto" Assini :

The syntax is similar, but what else is?

In JavaScript there is a "null" value, that is the only value of the null type.

Isn't () the same thing?  The only value of the unary type?

No, () has two values: () and undefined (t.i., _|_).

Best,

                titto

2009/11/6 John Dorsey :

...

...

In what sense () is a 0-length tuple?

In what sense isn't it?

Data.Tuple is much to narrow to be of any use here.  () is in at least most, if not all, of the type classes that tuples are in.  The syntax is strikingly similar.

If you ask me, it walks/quacks/smells like a duck, so it's a duck.

Regards, John

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