How can i duplicate a record with ruby (outside of rails)?

Question

I have a hash with an object id of 19475160, I need to clone my hash, how would I go about doing this? Every google search and article I have found points me to rails solutions but I cant find anything that is a regular ruby solution.

duplicate? http://stackoverflow.com/questions/8710642/ruby-dup-clone-recursively — Kris, Sep 13 '16 at 17:58

score 1 · Accepted Answer · answered Sep 13 '16 at 16:42

1

This will do a shallow copy of an object:

 obj2 = obj.clone

This will do a deep copy of an object:

  obj2 = Marshal.load(Marshal.dump(obj))

answered Sep 13 '16 at 16:42

Paweł Duda

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thanks, for my own knowledge can I ask what the difference is between a shallow copy and a deep copy? – alilland Sep 13 '16 at 16:57
@alilland Unlike shallow copy, deep copy will also copy any referenced objects in your data structure. – Paweł Duda Sep 13 '16 at 17:19

score 0 · Answer 2 · answered Sep 13 '16 at 17:09

0

You can use dup.

h = {a:1}
h2 = h.dup
h[:a] = 2
h2
=> {:a=>1}

h and h2 have different object_id's.

From dup reference:

Produces a shallow copy of obj—the instance variables of obj are copied, but not the objects they reference.

answered Sep 13 '16 at 17:09

B Seven

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How can i duplicate a record with ruby (outside of rails)?

2 Answers2