From: Dominik Bathon <dbatml@...>
Date: 2005-11-03T22:56:12+09:00
Subject: Re: Newbie: How to format a number to always show two decimals?

On Thu, 03 Nov 2005 01:57:09 +0100, Alan Chen <Digikata@gmail.com> wrote:

> mental@rydia.net wrote:
>> Now, not being a former C programmer, you may not be so strongly
>> tempted to write:
>>
>>  sprintf("%s%s%s", a.zolum, b.fep, c.gorza)
>>
>> when you could have simply written:
>>
>>  "#{a.zolum}#{b.fep}#{c.gorza}"
>>
>> ..but if you ever are, please be aware that it's worth TWO kittens.
>
> That reminds me, what are the options for nicely text formatted table
> output? I usually use something like:
> [a.zolum, b.feb, c.gorza].inject("") { |row,col| row.concat "%7s" % col
> }
>
> Are there better alternatives?

If your cols are strings:

[a.zolum, b.feb, c.gorza].map { |col| col.rjust(7) }.join

If they aren't you have to add to_s:

[a.zolum, b.feb, c.gorza].map { |col| col.to_s.rjust(7) }.join


Dominik