Official expansion of ||= conditional assignment operator

Question

I want to emphasize I am looking for the actual way the ||= operator is expanded by the Ruby 1.9.3 interpreter, not how it appears to be expan

Answer 1

x ||= y

is a shorthand form for

x || x = y

If x is not nil and x is not false, the assignation will have place because of the short-circuit evaluation of the || operator.