Forum: Ruby sprintf

Announcement (2017-05-07): www.ruby-forum.com is now read-only since I unfortunately do not have the time to support and maintain the forum any more. Please see rubyonrails.org/community and ruby-lang.org/en/community for other Rails- und Ruby-related community platforms.
Michael 'entropie' Trommer (Guest)
on 2005-12-22 02:27
(Received via mailing list)
Hello,

according ti the ruby core docu Kernel#sprintf:

> For string fields, the precision determines the maximum number of
> characters to be copied from the string. (Thus, the format sequence
> %10.10s will always contribute exactly ten characters to the result.)

my irb:

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?

So long
--
Michael 'entropie' Trommer;  http://ackro.org

ruby -e "0.upto((a='njduspAhnbjm/dpn').size-1){|x| a[x]-=1}; p
'mailto:'+a"
Florian F. (Guest)
on 2005-12-22 02:45
(Received via mailing list)
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.
Michael 'entropie' Trommer (Guest)
on 2005-12-22 02:51
(Received via mailing list)
* Florian F. (removed_email_address@domain.invalid) wrote:
> Michael 'entropie' Trommer wrote:
> >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 displays the
> floating point number with two decimal places.

thanks alot.

So long
--
Michael 'entropie' Trommer;  http://ackro.org

ruby -e "0.upto((a='njduspAhnbjm/dpn').size-1){|x| a[x]-=1}; p
'mailto:'+a"
This topic is locked and can not be replied to.