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swanandp/And-dot-demo.rb

Created May 31, 2017 08:47
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Ruby's &. operator is deceptive. It doesn't behave the same at foo && foo.something when foo is false.
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And-dot-demo.rb
irb(main):004:0> false&.foo
NoMethodError: undefined method `foo' for false:FalseClass
from (irb):4
from /Users/swanand/.rbenv/versions/2.3.1/bin/irb:11:in `<main>'
irb(main):005:0> false && false.foo
=> false
irb(main):006:0>
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