From: Brian Takita <brian.takita@...>
Date: 2005-08-23T14:14:50+09:00
Subject: Re: Named Arguments

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Here is yet another way (
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/52331) to do=20
this:

class AnotherTest
attr_accessor :test, :another_test

def initialize(args)
@test, @another_test =3D args.values_at(:test, :another_test)
end
end

t =3D AnotherTest.new({:test=3D>'test two', :another_test=3D>'test two agai=
n'})
p t.test
p t.another_test


On 8/22/05, Brian Takita <brian.takita@gmail.com> wrote:
>=20
> Here is how you can set the instance variable @test
>=20
> class Test
> attr_accessor :test
>=20
> def initialize(args)
> @test =3D args[:test] unless args[:test].nil?
> end
> end
>=20
> t =3D Test.new({:test=3D>'test one'})
> p t.test
>=20
>=20
> This way is more generic way to set the instance variables:
>=20
> class TestGeneric
> attr_accessor :test, :another_test
>=20
> def initialize(args)
> args.each do |k, v|
> self.instance_variable_set("@#{k.to_s}", v)
> end
> end
> end
>=20
> t =3D TestGeneric.new({:test=3D>'test two', :another_test=3D>'test two ag=
ain'})
> p t.test
> p t.another_test
>=20
>=20
> Of course, there may be a better way to do this.
>=20
> :Brian
>=20
> On 8/22/05, Kevin Olbrich <kevin.olbrich@duke.edu> wrote:
> >
> > I was working through the new version of the pickaxe tonight and decide=
d
> > to
> > try the 'named arguments' feature. The book suggests that one can simpl=
y
> > pass a hash with the names of local variables and they with=20
> automagically
> > get set to the hash values.
> >
> > I was not able to get this to work. Am I missing something here, or is
> > this
> > feature not working as described?
> >
> > _Kevin
> >
> >
> >
>=20
>

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