Avoiding copies of method arguments

[Justin To]

Hello!

v = 'abc'

some-method(v)

This will send a copy of v to the method, right? If so, how does one
avoid this. How can one send the original and avoid the extra
consumption of resources from copying? Thanks!

 

[schreiber.arthur]

Hello Justin!

No, this will not send a copy of v to some_method, but v itself.

Cheers,
Arthur

 

[Justin To]

Great, thanks so much!

 

[J. Cooper]

Just test it out:

irb >> def change(str)
irb >> str << 'z'
irb >> end
irb => nil
irb >> v
irb => "abc"
irb >> change(v)
irb => "abcz"
irb >> v
irb => "abcz"