[Newbies] Testing = and == in workspace

Ben Coman btc at openInWorld.com
Sat Jan 7 23:48:37 UTC 2012

Levente Uzonyi wrote:
> On Sat, 7 Jan 2012, Ben Coman wrote:
>> Bert Freudenberg wrote:
>>  Am 07.01.2012 um 07:04 schrieb Ben Coman <btc at openInWorld.com>:
>>  I had thought that the two assignments of 'xxx' to (x) and (y) would 
>> result in different objects, but they turn out to be identical.  It 
>> is like the compiler has noticed that they are equal and chosen to 
>> make them identical.
>>  That is indeed what's happening.
>> You can verify this by executing each line separately.
>> Thanks Bert. Doing that is insightful.  Interestingly the result is 
>> different with numbers.  Where strings assigned in separate 
>> executions are not
>> identical, numbers assigned in separate executions are identical - at 
>> lower values.  For example, number 12345678 has (x) and (y) identical 
>> but with
>> 123456789 they are not.  I then expected those number literals to be 
>> a different class, but both numbers inspect as SmallIntegers.  btw 
>> this is with
> That's impossible, SmallIntegers with the same value are identical.
> Levente
>> Pharo-1.3-13315-cog2522.
>> Anyway, my curiosity is satisfied for now.
>> cheers, Ben
I could have sworn I observed that behaviour last night, with the 
difference between the 8th and 9th digit, being SmallIntegers in both 
cases, but this morning I can't replicate it.  Now the difference is 
between the 9th and 10th digits, which makes more sense they become 
LargePositiveIntegers with the 10th digit.   I put it down to fatigue 
from being up too late. (though I would have sworn...)

As a final thing. For some naive reason I thought that the SmallIntegers 
would stop at 64k.  Is it platform dependent on whether the CPU is 
16/32/64 bit ?

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