From: Eric Hodel <drbrain@...7.net>
Date: 2005-11-16T09:19:32+09:00
Subject: Re: Quick question.


On Nov 15, 2005, at 4:14 PM, hmmm wrote:

> How would I format a number to simply be left-zero-padded with 2  
> floating
> points?
>
> eg.
> 000.24 from .238888888
> 001.24 from 1.237777777
> 010.25 from 10.249999999
> 100.25 from 100.24999999
>
> I can do: %.2f to get the 2 decimals, but it doesn't do left-zero-pad.
> I can do: %03d to pad 3 digits to the left, but it doesn't trim the  
> decimals

"%06.2f"

> I can do: printf("%03d%.2f", val, (val.to_f-val.to_i)) but that always
> injects
> an extra 0 like so:
>
> 0000.24
> 0010.24
> 0100.25
> 1000.25

"%07.2f"

> I have yet to find a good (useful) doc on how the format args work,  
> so point
> me there but beware that most of the docs out there are super  
> useless :)

printf(3) completely explains format strings.

-- 
Eric Hodel - drbrain@segment7.net - http://segment7.net
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