Re: New Rexx like data structure

On Mon, Apr 29, 2013 at 5:43 PM, Peter Hickman <
[e-mail]> wrote:

> On 29 April 2013 16:33, Robert Klemme <[e-mail]> wrote:
>
>> We can only make it work if you accept always getting an OpenStruct in
>> return
>>
>> irb(main):011:0> class OpenStruct
>> irb(main):012:1> alias _method_missing method_missing
>> irb(main):013:1> def method_missing(*a,&b) x=_method_missing(*a,&b);
>> x.nil? ? send("#{a.first}=", self.class.new) : x end
>> irb(main):014:1> end
>> => nil
>> irb(main):015:0> o=OpenStruct.new
>> => #<OpenStruct>
>> irb(main):016:0> o.foo.bar=123
>> => 123
>> irb(main):017:0> o
>> => #<OpenStruct foo=#<OpenStruct bar=123>>
>>
>>
> Hmm. That doesn't seem to work for me in 1.8.7 or 1.9.2
>
> ruby-1.9.2-p290 :001 > class OpenStruct
> ruby-1.9.2-p290 :002?>   alias _method_missing method_missing
> ruby-1.9.2-p290 :003?>   def method_missing(*a,&b)
> x=_method_missing(*a,&b); x.nil? ? send("#{a.first}=", self.class.new) : x
> end
> ruby-1.9.2-p290 :004?>   end
>  => nil
> ruby-1.9.2-p290 :005 >
> ruby-1.9.2-p290 :006 >   o=OpenStruct.new
>  => #<OpenStruct:0x00000100a9c3a0>
> ruby-1.9.2-p290 :007 > o.foo.bar=123
> NoMethodError: undefined method `foo' for #<OpenStruct:0x00000100a9c3a0>
> from (irb):3:in `method_missing'
> from (irb):7
>  from /Users/peterhickman/.rvm/rubies/ruby-1.9.2-p290/bin/irb:16:in
> `<main>'
> ruby-1.9.2-p290 :008 > o
>  => #<OpenStruct:0x00000100a9c3a0>
>
> Same error in both
>
>

Just to be sure: you did require "ostruct" did you?

robert@fussel:~$ irb -r ostruct
irb(main):001:0> class OpenStruct
irb(main):002:1>   alias _method_missing method_missing
irb(main):003:1>   def method_missing(*a,&b) x=_method_missing(*a,&b);
x.nil? ? send("#{a.first}=", self.class.new) : x end
irb(main):004:1> end
=> nil
irb(main):005:0>
irb(main):006:0* o = OpenStruct.new
=> #<OpenStruct>
irb(main):007:0> o.foo.bar = 123
=> 123
irb(main):008:0> RUBY_VERSION
=> "1.9.3"

Cheers

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/