[Haskell-cafe] Re: How to check object's identity?

[Günther Schmidt]

Hi Jan,

in functional programming there is no such thing as "identity" as we  
understand the idea from OO.

There is only such as thing as "equality" though.

Günther


Am 03.01.2009, 16:28 Uhr, schrieb Xie Hanjian <jan.h.xie at gmail.com>:

> Hi,
>
> I tried this in ghci:
>> Prelude> 1:2:[] == 1:2:[]
> True
>
> Does this mean (:) return the same object on same input, or
> (==) is not for identity checking? If the later is true, how
> can I check two object is the *same* object?
>
> Thanks
> Jan
>



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