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Ruby `dup` vs. `clone`. For http://www.arnab-deka.com/posts/2009/07/ruby-dup-vs-clone/
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the_clone = p.clone | |
the_dup = p.dup |
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irb(main):018:0> the_clone.name | |
=> "The Man" | |
irb(main):019:0> the_dup.name | |
=> "The Man" | |
irb(main):020:0> the_clone.say_hi | |
=> "'sup" | |
irb(main):021:0> the_dup.say_hi | |
NoMethodError: undefined method `say_hi' for | |
(Person :0xb7e83340 @name="The Man") | |
from (irb):21 | |
from :0 | |
irb(main):022:0> |
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class Person | |
attr_accessor :name | |
end |
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p = Person.new | |
p.name = "The Man" | |
# now add a singleton method on p: | |
def p.say_hi | |
"'sup" | |
end |
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irb(main):014:0> puts p.inspect | |
#<person :0xb7e83340 @name="The Man"> | |
=> nil | |
irb(main):015:0> puts p.say_hi | |
'sup | |
=> nil |
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