From: Harold Hausman <hhausman@...>
Date: 2005-11-01T09:21:35+09:00
Subject: Re: Newbie: How to format a number to always show two decimals?

------=_Part_9875_4065111.1130804492474
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Content-Disposition: inline

Alternatively there's this code from Phrogz's library (
http://phrogz.net/rubylibs) which to me is more rubyish than sprintf.
Everytime you use sprintf, God kills a kitten.

-Harold

#Code Follows:

class Numeric
# Rounds to the specified number of decimal places, returning a string
value.
#
# (1.234).round_to(2) =3D> '1.23'
# (-1.234).round_to(2) =3D> '-1.23'
# (-0.007).round_to(2) =3D> '-0.01'
# (-0.007).round_to(1) =3D> '0.0'
def round_to(decimals)
if self<0 then
s=3D'-';
x=3D-self;
else
s=3D'';
x=3Dself;
end
if x>=3D1.0e15 then
m=3Dx.to_s;
else
m=3D(x*10**decimals).round.to_s
if (decimals!=3D0) then
k=3Dm.length;
if k<=3Ddecimals then
z=3D'000000000000000'[0..(decimals-k)]
m=3Dz+m;
k=3Ddecimals+1;
end
m.insert(k-decimals,'.');
end
end
s=3D'' if (/^0\.0*$/=3D~m);
s+m;
end
end


On 10/31/05, i.v.r. <ivanvega@gmail.com> wrote:
>
> James Edward Gray II wrote:
> > On Oct 31, 2005, at 4:47 PM, i.v.r. wrote:
> >
> >> Hi,
> >>
> >> This seems like a simple task, yet I've been unable to accomplish it.
> >> Somewhere I read you could do:
> >>
> >> num.round(2).to_s("F")
> >>
> >> But that is not working, as the round method doesn't accept any
> >> parameters.
> >>
> >> Could someone help me figure this out?
> >
> > >> sprintf("%.2f", 1.012345)
> > =3D> "1.01"
> > >> # ... or ...
> > ?> "%.2f" % 1.012345
> > =3D> "1.01"
> >
> > Hope that helps.
> >
> > James Edward Gray II
> >
> >
> That was fast! Thanks a lot.
>
>
>

------=_Part_9875_4065111.1130804492474--