Ruby On Rails 面试题与答案
Question: What is the difference between &&, AND and & operators?Answer:The && and and are both logical and statements. They && operator has higher precedence though. Heres an example of illustrate this in more detail: foo = 3 bar = nil a = foo and bar # => nil a # => 3 a = foo && bar # => nil a # => nil Notice how the statement a = foo and bar actually behaves like (a = foo) and bar |
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