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Contents
require 'facet/kernel/set_with'
module Kernel
# Set setter methods using a another object.
#
# class X
# attr_accessor :a, :b
# def initialize( a, b )
# @a,@b = a,b
# end
# end
#
# obj1 = X.new( 1, 2 )
# obj2 = X.new
#
# obj2.set_from(obj1)
#
# obj2.a #=> 1
# obj2.b #=> 2
#
def set_from(obj, *fields)
unless fields.empty?
fields.each do |k|
send( "#{k}=", obj.send("#{k}") ) #if self.respond_to?("#{k}=") && obj.respond_to?("#{k}")
end
else
setters = methods.collect { |m| m =~ /=$/ }
setters.each do |setter|
getter = setter.chomp('=')
if obj.respond_to?(getter)
send( setter, obj.send(getter) )
fields < getter
end
end
end
fields
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TCKernel < Test::Unit::TestCase
Customer = Struct.new( "Customer", :name, :address, :zip )
def test_set_from
bob = Customer.new("Bob Sawyer", "123 Maple, Anytown NC", 12345)
joe = Customer.new("Joe Pitare")
joe.set_from(bob, :address, :zip)
assert_equal("Joe Pitare", joe.name)
assert_equal("123 Maple, Anytown NC", joe.address)
assert_equal(12345, joe.zip)
end
end
=end
Version data entries
22 entries across 22 versions & 1 rubygems