From: Wybo Dekker <wybo@...4all.nl>
Date: 2012-07-16T23:54:10+09:00
Subject: rounding to nearest even: nio gem?

Is there a gem which makes it easy to round floats to the nearest even
digit, such that:

8.5.round(0) => 8
7.5.round(0) => 8
1.0345.round(3) => 1.034
1.0335.round(3) => 1.034

I have been reading the docs of the nio gem, but can't find out how that
works; for example:

7.5.nio_write(Nio::Fmt.mode(:fix,0,:round=>:even)) => "8" (ok)
8.5.nio_write(Nio::Fmt.mode(:fix,0,:round=>:even)) => "9" (wrong)
1.0345.nio_write(Nio::Fmt.mode(:fix,3,:round=>:even)) => "1.034" (ok)
1.0335.nio_write(Nio::Fmt.mode(:fix,3,:round=>:even)) => "1.034" (ok)
-- 
Wybo