“和"之间的区别和&&在红宝石? [英] Difference between "and" and && in Ruby?

问题描述

Ruby 中的 && 和 and 运算符有什么区别?

What is the difference between the && and and operators in Ruby?

推荐答案

and 与 && 相同，但带有 较低的优先级.他们都使用短路评估.

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 =，因此您通常希望避免 and.在和的示例rel="noreferrer">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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