Ruby 中方法名称末尾的问号是什么意思? [英] What does the question mark at the end of a method name mean in Ruby?

问题描述

Ruby 中问号运算符的用途是什么?

What is the purpose of the question mark operator in Ruby?

有时看起来像这样:

assert !product.valid?

有时它位于 if 结构中.

sometimes it's in an if construct.

推荐答案

是代码风格的约定；它表示一个方法返回一个布尔值.

It is a code style convention; it indicates that a method returns a boolean value.

问号是方法名称末尾的有效字符.

The question mark is a valid character at the end of a method name.

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