From: eoghan <ruby@...>
Date: 2005-10-19T19:35:14+09:00
Subject: Re: require problem

Brian Schr�der wrote:
> On 19/10/05, eoghan <ruby@redry.net> wrote:
>> Brian Schr�der wrote:
>>> On 19/10/05, eoghan <ruby@redry.net> wrote:
>>>> Hello
>>>> Im doing a simple test. I have 2 files:
>>>> mouse.rb
>>>> ---------
>>>> my_string = 'blah'
>>>>
>>>> rabbit.rb
>>>> ---------
>>>> require 'foo'
>>>>
>>>> print my_string
>>>>
>>>> eoghanj$ /opt/local/bin/ruby bar.rb
>>>> bar.rb:3: undefined local variable or method `my_string' for
>>>> main:Object (NameError)
>>>>
>>>> Im simplified my example down to this; and I cant see what im doing
>>>> wrong... hope its not too stupid.
>>>> I read this part about irb restrictions, but im not sure it applies?
>>>> http://www.rubycentral.com/book/irb.html
>>>> Thanks
>>>> Eoghan
>>>>
>>>>
>>> Unlike in php or c require and load do not simply replace the
>>> statement with the file, but are carefull not to introduce any local
>>> variables. Try the following.
>>>
>>> mouse.rb
>>> ---
>>> module AnimalConstants
>>>   MOUSE_NAME = "Mickey Mouse"
>>> end
>>>
>>> rabbit.rb
>>> ---s
>>> require 'mouse'
>>>
>>> p AnimalConstants::MOUSE_NAME
>>>
>>> Constants and Globals are imported. (Note that you do not need to
>>> structure your constants using a module, it was just to show this
>>> effekt.)
>>>
>>> regards,
>>>
>>> Brian
>> Thanks I understand what you are saying... however consider the
>> following example from whys guide (and maybe im missing something here
>> again...)
>> http://www.poignantguide.net/ruby/chapter-4.html#section3
>>
>> wordlist.rb
>> ===========================================================
>>   code_words = {
>>     'starmonkeys' => 'Phil and Pete, those prickly chancellors of the
>> New Reich',
>>     'catapult' => 'chucky go-go', 'firebomb' => 'Heat-Assisted Living',
>>     'Nigeria' => "Ny and Jerry's Dry Cleaning (with Donuts)",
>>     'Put the kabosh on' => 'Put the cable box on'
>>   }
>> ===========================================================
>>
>> i assume this should be saved to a file too...?
>> ===========================================================
>>   require 'wordlist'
>>
>>   # Get evil idea and swap in code words
>>   print "Enter your new idea: "
>>   idea = gets
>>   code_words.each do |real, code|
>>     idea.gsub!( real, code )
>>   end
>>
>>   # Save the jibberish to a new file
>>   print "File encoded.  Please enter a name for this idea: "
>>   idea_name = gets.strip
>>   File::open( "idea-" + idea_name + ".txt", "w" ) do |f|
>>     f << idea
>>   end
>>
>> This doesnt work either. For me at least. Any ideas?
>> Eoghan
>>
>>
> 
> Hello Eoghan,
> 
> this is a known bug in _why's tutorial. It would be a good idea if it
> were fixed in the tutorial, as this question comes up from time to
> time on this mailing list. Change code_words to CODE_WORDS and it
> works.
> 
> regards,
> 
> Brian
> 
> --
> http://ruby.brian-schroeder.de/
> 
> Stringed instrument chords: http://chordlist.brian-schroeder.de/

Thanks Brian.