Sha256: a93917ffbd6a0a10a0d671e81bcb49cf7016a94ff44204ee2a5acadc7a808b88
Contents?: true
Size: 1.82 KB
Versions: 10
Compression:
Stored size: 1.82 KB
Contents
module DeepClone
# = DeepClone
#
# == Version
# 1.2006.05.23 (change of the first number means Big Change)
#
# == Description
# Adds deep_clone method to an object which produces deep copy of it. It means
# if you clone a Hash, every nested items and their nested items will be cloned.
# Moreover deep_clone checks if the object is already cloned to prevent endless recursion.
#
# == Usage
#
# (see examples directory under the ruby gems root directory)
#
# require 'rubygems'
# require 'deep_clone'
#
# include DeepClone
#
# obj = []
# a = [ true, false, obj ]
# b = a.deep_clone
# obj.push( 'foo' )
# p obj # >> [ 'foo' ]
# p b[2] # >> []
#
# == Source
# http://simplypowerful.1984.cz/goodlibs/1.2006.05.23
#
# == Author
# jan molic (/mig/at_sign/1984/dot/cz/)
#
# == Licence
# You can redistribute it and/or modify it under the same terms of Ruby's license;
# either the dual license version in 2003, or any later version.
#
def deep_clone( obj=self, cloned={} )
if cloned.has_key?( obj.object_id )
return cloned[obj.object_id]
else
begin
cl = obj.clone
rescue Exception
# unclonnable (TrueClass, Fixnum, ...)
cloned[obj.object_id] = obj
return obj
else
cloned[obj.object_id] = cl
cloned[cl.object_id] = cl
if cl.is_a?( Hash )
cl.clone.each { |k,v|
cl[k] = deep_clone( v, cloned )
}
elsif cl.is_a?( Array )
cl.collect! { |v|
deep_clone( v, cloned )
}
end
cl.instance_variables.each do |var|
v = cl.instance_eval( var.to_s )
v_cl = deep_clone( v, cloned )
cl.instance_eval( "#{var} = v_cl" )
end
return cl
end
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems