Le 5/2/15 10:40, Sven Van Caekenberghe a écrit :
On 05 Feb 2015, at 10:36, Ben Coman <[email protected]> wrote:
I personally would prefer to be able to use exponents. No sure what the big
picture is.
cheers -ben
Of course exponents are still supported ;-)
The discussion is about the + sign for positive exponents. I am not sure, but I
think that traditional Smalltalk did not support this, but it was added to
support common practice in other languages. Now it is apparently gone again,
probably not on purpose.
I do not know I think that marcus removed it to avoid to have two
parsers in the image.
On Thu, Feb 5, 2015 at 12:27 AM, Mariano Martinez Peck <[email protected]>
wrote:
Hi guys,
In Pharo 2.0, the expression "Number readFrom: '2.5850009999999998e+04' " would
answer 25850.01 , but in Pharo 3.0 it answers: 2.5850009999999997 which is a kind of WTF
to me.
Checking the differences it seems in Pharo 2.0 ExtendedNumberParser (used from Number
>> readFrom: ) implemented:
allowPlusSign
^true
However, in Pharo 3.0 it seems subclasses of NumberParser have been merged directly
in NumberParser class (and so Number >> readFrom: uses this class now).
But.. (and this is the difference), NumberParser implements:
allowPlusSign
^false
So I wonder...was this on purpose or a side effect? Why would we want to reject
using + as part of the exponential notion??
So in my case now I must do an override to:
NumberParser >> allowPlusSignInExponent
^ true
Thoughts?
--
Mariano
http://marianopeck.wordpress.com
