当心即时值

Posted 2021-02-26

What a gotcha!

# immediate values
# e.g. true, false and Integers
a = true # => true
b = true # => true
 
def a.foo 
  "bar"
end
 
a.foo # => "bar"
b.foo # => "bar"
 
# referenced values
c = "foo" # => "foo"
d = "foo" # => "foo"
 
def c.meep
 "blubb"
end
 
d.meep # => undefined method