With statement

ruby-talk
1

I'm pretty sure ruby doesn't have a with statement. Is it possible to
emulate one?

···

--
Posted via http://www.ruby-forum.com/.

2

Yes:

module Kernel
  def with(obj, &b)
    obj.instance_eval(&b)
  end
end

Usage:

class Foo
  def dostuff
    puts "doing stuff in Foo"
  end
end

foo = Foo.new

with foo do
  dostuff
end

Rgds,
Lars

···

On Jan 4, 11:51 am, ole __ <oliver.saund...@gmail.com> wrote:

I'm pretty sure ruby doesn't have a with statement. Is it possible to
emulate one?

3

Maybe. You're not very clear on what semantics you expect from 'with'. But you might try

    alias with instance_eval

Then you can write stuff such as:

obj.with do
    foo
    bar
end

in place of

    obj.foo
    obj.bar

Regards, Morton

···

On Jan 4, 2008, at 5:51 AM, ole __ wrote:

I'm pretty sure ruby doesn't have a with statement. Is it possible to
emulate one?
-- Posted via http://www.ruby-forum.com/\.

4

Lars wrote:

I'm pretty sure ruby doesn't have a with statement. Is it possible to
emulate one?

Yes:

Or

class Object
  def with(&b)
    instance_eval(&b)
  end
end

#Usage:

class Foo
  def dostuff
    puts "doing stuff in Foo"
  end
end

foo = Foo.new

foo.with do
  dostuff
end

Tiziano

···

On Jan 4, 11:51 am, ole __ <oliver.saund...@gmail.com> wrote:

--
Posted via http://www.ruby-forum.com/\.

5

Great solutions thanks guys.
I think I'm going to go with the...

with obj do
    method_from_obj
end

...one because it reads better as English.

···

--
Posted via http://www.ruby-forum.com/.

6

If you get my gem utility_belt, it has a with statement by Dan Yoder
in it. This thread came up about a month ago here. Weird to think that
this is a FAQ.

···

On 1/4/08, ole __ <oliver.saunders@gmail.com> wrote:

Great solutions thanks guys.
I think I'm going to go with the...

with obj do
    method_from_obj
end

...one because it reads better as English.
--
Posted via http://www.ruby-forum.com/\.

--
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