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comp.lang.ruby

Is this pattern current?

Robert Dober

11/26/2007 12:01:00 PM

Hi list

I just wrote

o = super( *args)
my_init.bind( o ).call( *args )
o

I write code of this patter way too often, I was just thinking that I
really would like to have
module Kernel
def with_value_return_value a_value, &blk
blk.call a_value

end
end

--

http://ruby-smalltalk.blo...

---
All truth passes through three stages. First, it is ridiculed. Second,
it is violently opposed. Third, it is accepted as being self-evident.
Schopenhauer (attr.)
3 Answers

Robert Dober

11/26/2007 12:04:00 PM

0

On Nov 26, 2007 1:00 PM, Robert Dober <robert.dober@gmail.com> wrote:
OOps finger just slipping to the nice Enter key :-(
> Hi list
>
> I just wrote
>
> o = super( *args)
> my_init.bind( o ).call( *args )
> o
>
> I write code of this patter way too often, I was just thinking that I
> really would like to have
> module Kernel
> def with_value_return_value a_value, &blk
> blk.call a_value
a_value
>
> end
> end


Now of course I can write

with_value_return_value( super(*args) ) do |o|
my_init.bind(o).call(*args)
end

Does someone have a name for this? (mine is a joke, a bad one)

Cheers
Robert
http://ruby-smalltalk.blo...

---
All truth passes through three stages. First, it is ridiculed. Second,
it is violently opposed. Third, it is accepted as being self-evident.
Schopenhauer (attr.)

Sylvain Joyeux

11/26/2007 12:37:00 PM

0

> with_value_return_value( super(*args) ) do |o|
> my_init.bind(o).call(*args)
> end
AFAIK this is called #returning in both facets and activesupport. There
has been a discussion about it a while ago.

http://groups.google.com/group/comp.lang.ruby/browse_thread/thread/70dadf80a5f57e1f/4433b2...
--
Sylvain

Robert Dober

11/26/2007 1:04:00 PM

0

On Nov 26, 2007 1:37 PM, Sylvain Joyeux
<sylvain.joyeux@polytechnique.org> wrote:
> > with_value_return_value( super(*args) ) do |o|
> > my_init.bind(o).call(*args)
> > end
> AFAIK this is called #returning in both facets and activesupport. There
> has been a discussion about it a while ago.
>
> http://groups.google.com/group/comp.lang.ruby/browse_thread/thread/70dadf80a5f57e1f/4433b2...
Very interesting discussion, and the name seems quite ok with me.
As this was more than a year ago I dare adding some reasoning.

What I like most on this idiom is that the local variable is hiding in
the scope, but much more importantly that you can think on a higher
level

o = something
...
...
...
o

just seems low level and I daresay that the final little o, so
important, will be forgotten quite often

returning( something ) do |o|
...
...
...
end

seems so much more robust.

And for what concerns #tap, well impossible to keep a name like that in mind :(.

BTW good to know it's in Facets.

Cheers
Robert

> --
> Sylvain
>
>



--

http://ruby-smalltalk.blo...

---
All truth passes through three stages. First, it is ridiculed. Second,
it is violently opposed. Third, it is accepted as being self-evident.
Schopenhauer (attr.)