From: Rob Biedenharn <Rob@...>
Date: 2009-03-19T14:31:06+09:00
Subject: Re: Is this how you start a hash?


On Mar 18, 2009, at 11:50 PM, Power One wrote:

> This helps me a lot! :)
>
> Plus from now on, if something looks like an array but without the  
> index
> (ex: options[3]), then I can safely assumed it's a form of hash but  
> in a
> reading stage.
>
> Thank guys!

No, you can assume that it is the [] method sent to the object  
referenced by options.

irb> options = lambda {|x| x.to_s.reverse }
=> #<Proc:0x00007f8ce288b9b0@(irb):1>
irb> options[3]
=> "3"
irb> options["hash"]
=> "hsah"
irb> options[:foo]
=> "oof"

For lambdas or Procs, this is the same as options.call("hash"), etc.

-Rob

Rob Biedenharn		http://agileconsultingllc.com
Rob@AgileConsultingLLC.com

> lists wrote:
>> On Mar 18, 2009, at 7:50 PM, Power One wrote:
>>
>>> attr_reader :name
>>>
>> Yes, you'd normally create a new has with either Hash.new or hash =
>> {}.  The method above is expecting that an already populated Hash be
>> passed as its argument (internally referred to as the options
>> variable).  So here's how you'd use the Bot class:
>>
>> Bot.new(:name => 'My Bot', :data_file => '/tmp/file.yml')
>>
>> Maybe this helps you see the Hash more clearly:
>>
>> Bot.new({:name => 'My Bot', :data_file => '/tmp/file.yml'})
>>
>> or even:
>>
>> my_options = {:name => 'My Bot', :data_file => '/tmp/file.yml'}
>> Bot.new(my_options)
>>
>> Hope this helps.
> -- 
> Posted via http://www.ruby-forum.com/.