Re: [Rails] meta-programming 101

On Sun, Oct 10, 2010 at 9:16 AM, Rajinder Yadav <devguy.ca@gmail.com> wrote:
> how can I get the following to work, what am I not understanding about how
> modules work?

there are many ways, but i usually start as simple as possible,
creating modules by fxn. classes simple as possible

# we have module that defines method
module MakeMethod
def make_method( name )
define_method( name ) do |count|
puts "you called method #{name.to_s}"
puts "the count is #{count}"
end
end
end

# we have module that modifies a class and creates corr methods
module MethodMaker
class << self
include MakeMethod
end

make_method :hello
make_method :bye

end

# we create class, as simple as possible
class Person

def initialize( name )
@name = name
end

def greet
puts "Hello! I'm #{@name}"
end

end

# we create person class. it works
j=Person.new "rajin"

# but hello method does not work yet since we've not defined it yet on
person class
# j.hello 1 => will err here

# now we modify person
class Person
include MethodMaker
end

# the new methods now work
j.hello 1
j.bye 1

best regards
-botp

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