[REBOL] Re: On mutability and sameness
From: agem:crosswinds at: 6-Jun-2001 23:02
>>>>>>>>>>>>>>>>>> Ursprüngliche Nachricht <<<<<<<<<<<<<<<<<<
Am 06.06.01, 21:38:13, schrieb "Ladislav Mecir" <[lmecir--mbox--vol--cz]> zum
Thema [REBOL] Re: On mutability and sameness:
> Hi,
> a: now ; == 6-Jun-2001/22:36:26+2:00
> b: a ; == 6-Jun-2001/22:36:26+2:00
> same? a b ; == true
> a/day: 7 ; == 7
> same? a b ; == false
> provides evidence that the value of 'a has been replaced instead of
mutated.
Veto!
My POV: same? Checks if two »slots« are »binary« the same.
For references this means »calling the same people«.
For scalars this means the same value.
Of course the value is changed. But in place.
>> a: [ 1 2 3]
== [1 2 3]
>> b: next a
== [2 3]
>> same? a b
== false
>> b: back b
== [1 2 3]
>> same? a b
== true
