Ruby递归/克隆递归

Question

我有一个哈希:

h = {'name' => 'sayuj', 
     'age' => 22, 
     'project' => {'project_name' => 'abc', 
                   'duration' => 'prq'}}

我需要一个这个哈希的副本,更改不应该影响原始哈希.

当我尝试时,

d = h.dup # or d = h.clone
d['name'] = 'sayuj1'
d['project']['duration'] = 'xyz'

p d #=> {"name"=>"sayuj1", "project"=>{"duration"=>"xyz", "project_name"=>"abc"}, "age"=>22}
p h #=> {"name"=>"sayuj", "project"=>{"duration"=>"xyz", "project_name"=>"abc"}, "age"=>22}

在这里,您可以看到project['duration']原始哈希中的更改是因为project是另一个哈希对象.

我想要散列duped或cloned递归.我怎样才能做到这一点？

Answer 1

以下是如何在Ruby中制作深层副本

d = Marshal.load( Marshal.dump(h) )