From: Florian Frank <flori@...>
Date: 2005-12-22T09:43:12+09:00
Subject: Re: sprintf

Michael 'entropie' Trommer wrote:

>irb(main):004:0> sprintf("%2s", "lalaa")
>=> "lalaa"
>irb(main):005:0> sprintf("%2i", 1212)
>=> "1212"
>
>ruby 1.8.3 (2005-09-21) [i686-linux]
>
>What s my mistake?
>  
>
You didn't use a precision:

sprintf("%10.2s", "lalaa")     # => "        la"

This creates a size 10 string, left padded with spaces, and copies only 
two characters from the argument.

sprintf("%10.2f", 1212.123) # => "   1212.12"

This creates a size 10 string, left padded with spaces, and displays the 
floating point number with two decimal places.

-- 
Florian Frank