How can I use the last returned value?

ruby-talk
1

<nobu.nokada@softhome.net> wrote in message
news:200406082253.i58MrAwl019111@sharui.nakada.niregi.kanuma.t

ochigi.jp...

Hi,

At Wed, 9 Jun 2004 02:03:37 +0900,
Dennis Ranke wrote in [ruby-talk:102807]:
> > In Python, I use '_'(underscore) for the last returned value.
> >>>> print "Hello"
> > "Hello"
> >>>> x = _
> >>>> print x
> > "Hello"
> >
> > What is the equivalent in Ruby?
>
> If you mean what's the equivalent in irb then my answer would be:
>
> IRB.CurrentContext.last_value
>
> But that's a bit cumbersome :wink:

EVAL_HISTORY enables _.

$ grep HISTORY ~/.irbrc
IRB.conf[:EVAL_HISTORY] = 1000
IRB.conf[:SAVE_HISTORY] = 100

$ irb
irb(main):001:0> 2+2
=> 4
irb(main):002:0> _
=> 4
irb(main):003:0>

--
Nobu Nakada

Hi!

Thanks for the reply.

However, I cannot do it.
Could you elaborate a little bit more?

I use Windows XP.
And I brought up 'irb' and tried the following:

irb(main):001:0> irb.conf[:EVAL_HISTORY]=1000
irb#1(main):001:0> irb.conf[:SAVE_HISTORY]=100
irb#2(main):001:0> 3+3 => 6 irb#2(main):002:0> _ => nil
irb#2(main):003:0>

What's wrong?

Thanks again.

I followed the examples (great tip fr humble Nobu).

c:\family\ruby>ver

Microsoft Windows XP [Version 5.1.2600]

c:\family\ruby>type .irbrc
IRB.conf[:EVAL_HISTORY] = 1000
IRB.conf[:SAVE_HISTORY] = 100

c:\family\ruby>irb
irb(main):001:0> 2+2
=> 4
irb(main):002:0> _*4
=> 16
irb(main):003:0>

if you put .irbrc in your current dir, irb will find it for sure.

Sam

I moved your top post, Sam :slight_smile:

kind regards -botp

···

Sam Sungshik Kong [mailto:ssk@chol.nospam.net] wrote: