Metaprogramming in Ruby - Revision history

PeterHarding at 23:20, 29 July 2012

2012-07-29T23:20:52Z

← Older revision		Revision as of 09:20, 30 July 2012
Line 60:		Line 60:
	[[Category:Ruby]]		[[Category:Ruby]]
	[[Category:Examples]]		[[Category:Examples]]
	[[~~Caegory~~:Metaprogramming]]		[[Category:Metaprogramming]]

PeterHarding: /* Reimplement attr_accessor */

2012-05-14T03:27:42Z

Reimplement attr_accessor

← Older revision		Revision as of 13:27, 14 May 2012
Line 9:		Line 9:
	def my_attr_accessor(name)		def my_attr_accessor(name)

			ivar_name = "@#{name}"
	STDERR.print "#{name}\n"		STDERR.print "#{name}\n"

	~~ivar_name = "@#{name}"~~

	define_method(name) do		define_method(name) do

PeterHarding: /* Reimplement attr_accessor */

2012-05-14T03:26:54Z

Reimplement attr_accessor

← Older revision		Revision as of 13:26, 14 May 2012
Line 47:		Line 47:

	<pre>		<pre>
	~~vega:~ plh~~$ ~~!./~~		$ ./meta.rb
	./meta.rb
	var		var
	tst		tst

PeterHarding: /* Reimplement attr_accessor */

2012-05-14T03:26:26Z

Reimplement attr_accessor

@@ Line 43: / Line 43: @@
 puts ex.tst
 </pre>
 [[Category:Ruby]]
 [[Category:Examples]]
 [[Caegory:Metaprogramming]]

PeterHarding: /* Reimplement attr_accessor */

2012-05-14T03:25:31Z

Reimplement attr_accessor

← Older revision		Revision as of 13:25, 14 May 2012
Line 6:		Line 6:

	module Accessor		module Accessor

	def my_attr_accessor(name)		def my_attr_accessor(name)

	STDERR.print "#{name}\n"		STDERR.print "#{name}\n"

	ivar_name = "@#{name}"		ivar_name = "@#{name}"

	define_method(name) do		define_method(name) do
	STDERR.print "Get #{name}\n"		STDERR.print "Get #{name}\n"
	instance_variable_get(ivar_name)		instance_variable_get(ivar_name)
	end		end

	define_method("#{name}=") do \|val\|		define_method("#{name}=") do \|val\|
	STDERR.print "Set #{name} = #{val}\n"		STDERR.print "Set #{name} = #{val}\n"
	instance_variable_set(ivar_name, val)		instance_variable_set(ivar_name, val)
	end		end

	end		end
	end		end

PeterHarding: Created page with " =Reimplement attr_accessor=

 #!/usr/bin/env ruby  module Accessor    def my_attr_accessor(name)       STDERR.print "#{name}\n"       ivar_name = "@#{name}"       define..."

2012-05-14T03:24:48Z

Created page with " =Reimplement attr_accessor= <pre> #!/usr/bin/env ruby module Accessor def my_attr_accessor(name) STDERR.print "#{name}\n" ivar_name = "@#{name}" define..."

New page

=Reimplement attr_accessor=

<pre>
#!/usr/bin/env ruby

module Accessor
def my_attr_accessor(name)
STDERR.print "#{name}\n"
ivar_name = "@#{name}"
define_method(name) do
STDERR.print "Get #{name}\n"
instance_variable_get(ivar_name)
end
define_method("#{name}=") do |val|
STDERR.print "Set #{name} = #{val}\n"
instance_variable_set(ivar_name, val)
end
end
end

class Example
extend Accessor
my_attr_accessor :var
my_attr_accessor :tst
end

ex = Example.new

ex.var = 99

puts ex.var

ex.tst = 2

puts ex.tst
</pre>

[[Category:Ruby]]
[[Category:Examples]]
[[Caegory:Metaprogramming]]