27 Sep
2011
27 Sep
'11
12:47 p.m.
Hello,
On Tue, Sep 27, 2011 at 8:49 AM, Chris Smith
You could calculate the entire range using Rational and then convert each individual value after the fact. That doesn't seem like a reasonable default, since it has a runtime performance cost. Of course you're welcome to do it when that's what you need.
last ([0.1, 0.2 .. 0.5]) == 0.5 False
last (map fromRational [0.1, 0.2 .. 0.5]) == 0.5 True
As Ross pointed out in a previous e-mail the instance for Rationals is also broken:
last (map fromRational [1,3 .. 20]) 21.0
-Iavor