25 Apr
2012
25 Apr
'12
10:20 p.m.
Hi,
The following code
((-10 to: 10) collect: [ :each | each * Float pi ]) = ((((-10 to: 10) collect: [ :each | each * Float pi ]) collect: [ :each | each asString]) collect: [ :each | Float readFrom: each ])
returns true on Pharo 1.4 and false on Squeak 4.3 Some of the Floats in the array compare equal, some not.
Similary, (10 raisedTo: -100) asFloat
prints as '1.0e-100' in Pharo and as ' 9.99999999999999e-101' in Squeak.
I know that comparing Floats on equality is often dangerous and that #closeTo: is better. But I would like to understand how there could be such a difference between the two.
Nicolas ?
Thx,
Sven