“和"之间的区别和&&在Ruby中? [英] Difference between "and" and && in Ruby?
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问题描述
Ruby中&&和and运算符之间有什么区别?
What is the difference between the && and and operators in Ruby?
推荐答案
and与&&相同，但具有短路评估.
and is the same as && but with lower precedence. They both use short-circuit evaluation.
警告:and的优先级甚至低于=，因此通常需要避免使用and.在<and的示例. >避免双重渲染错误".
WARNING: and even has lower precedence than = so you'll usually want to avoid and. An example when and should be used can be found in the Rails Guide under "Avoiding Double Render Errors".
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