Le 5/2/15 10:40, Sven Van Caekenberghe a écrit :
On 05 Feb 2015, at 10:36, Ben Coman <btc@openInWorld.com> 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 <marianopeck@gmail.com> 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