From: Rob Biedenharn <Rob@...>
Date: 2010-09-05T02:00:16+09:00
Subject: Re: p vs. print

On Sep 4, 2010, at 12:02 PM, Chad Perrin wrote:
> On Fri, Sep 03, 2010 at 04:40:45AM +0900, Quintus wrote:
>>
>> irb(main):003:0> print [1, 2, 3]
>> [1, 2, 3]=> nil
>
> Are you sure about that?  I get this:
>
>    irb(main):001:0> print [1, 2, 3]
>    123=> nil
>
> The result you showed should probably be produced by:
>
>    print [1, 2, 3].inspect
>
> --  
> Chad Perrin [ original content licensed OWL: http://owl.apotheon.org ]


It all depends on what ruby you're using:

$ rvm ruby -e 'a=[1,2,3];puts "to_s",a.to_s; puts "inspect",a.inspect'
info: jruby-1.5.1: jruby 1.5.1 (ruby 1.8.7 patchlevel 249) (2010-06-06  
f3a3480) (Java HotSpot(TM) Client VM 1.5.0_24) [i386-java]

Unable to find a $JAVA_HOME at "/usr", continuing with system-provided  
Java...
to_s
123
inspect
[1, 2, 3]

info: ree-1.8.7-head: ruby 1.8.7 (2009-06-12 patchlevel 174) [i686- 
darwin9.8.0]

to_s
123
inspect
[1, 2, 3]

info: ruby-1.8.6-p383: ruby 1.8.6 (2009-08-04 patchlevel 383) [i686- 
darwin9.8.0]

to_s
123
inspect
[1, 2, 3]

info: ruby-1.9.1-p378: ruby 1.9.1p378 (2010-01-10 revision 26273)  
[i386-darwin9.8.0]

to_s
[1, 2, 3]
inspect
[1, 2, 3]

info: ruby-1.9.2-p0: ruby 1.9.2p0 (2010-08-18 revision 29036) [i386- 
darwin9.8.0]

to_s
[1, 2, 3]
inspect
[1, 2, 3]


So you might both be "right" on this.

-Rob

Rob Biedenharn		
Rob@AgileConsultingLLC.com	http://AgileConsultingLLC.com/
rab@GaslightSoftware.com		http://GaslightSoftware.com/