[Haskell-cafe] Wikipedia on first-class object

[Cristian Baboi]

On Thu, 27 Dec 2007 18:19:47 +0200, Wolfgang Jeltsch  
<g9ks157k at acme.softbase.org> wrote:

> Am Donnerstag, 27. Dezember 2007 16:34 schrieb Cristian Baboi:
>> I'll have to trust you, because I cannot test it.
>>
>> let x=(1:x); y=(1:y) in x==y .
>>
>> I also cannot test this:
>>
>> let x=(1:x); y=1:1:y in x==y
>
> In these examples, x and y denote the same value but the result of x ==  
> y is
> _|_ (undefined) in both cases.  So (==) is not really equality in  
> Haskell but
> a kind of weak equality: If x doesn’t equal y, x == y is False, but if x
> equals y, x == y might be True or undefined.

Thank you.

I can only notice that y always has an even number of 1, which is not the  
case for x :-)



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