From: Yohanes Santoso <ysantoso-rubytalk@...>
Date: 2006-01-04T11:14:56+09:00
Subject: Re: More on the fundamentals...

John Maclean <info@jayeola.org> writes:

> In this line of code can anyone tell me why "food" is a method? I
> thought that they are preceded by a dot.

It is not a method, it's a variable, very possibly a block-local one.

>
>     __  an array           __ the method   __ parameters for code block
>    /                      /               /
>   [cornflakes, yam, rice].each { |food| eat food}
>                                /   \
>               code block    __/     \__block args
>

^^^ is parsed as: [corflakes, yam, rice].each {|food| eat(food)}

YS.


>
> On Tue, 3 Jan 2006 23:51:15 +0900
> John Maclean <info@jayeola.org> wrote:
>
>> Please have a look at the comments below to see that I'm understanding things correctly;
>> 
>> #!/usr/bin/ruby
>> #Tue Jan  3 14:04:28 GMT 2006
>> class Greeter
>>         # a new class cllaed Greeter
>>         def initialize(name) 
>>                 # creating a new method called name
>>                 @name = name 
>>                 # we define a new @instance variable called name
>>         end
>>         def say(phrase)
>>                 # creating a new method called phrase...
>>                 puts "#{phrase}, #{@name}"
>>                 # ... which uses doube quotes to substitute
>>         end
>> end
>> 
>> # say hello 
>> g1 = Greeter.new("jayeola")
>> g2 = Greeter.new("buddy")
>> g3 = Greeter.new("vimmer")
>> g4 = Greeter.new("slammer")
>> # we have just created four new  (object) instances belonging to the class
>> # Greeter. They can now use the instance variables that have been created
>> # above
>> g1.say("Hello")
>> g2.say("Wotcha")
>> g3.say("Ire!")
>> g4.say("Elake")
>> 
>
>
> -- 
> John Maclean
> MSc (DIC)
> 07739 171 531