基础 - Ruby中"?"运算符的使用

Question

 if next_move.include? "0" or next_move.include? "1"
     xxxxxxx
 end

在笨办法学Ruby中看到这里不太明白

Answer 1

is not an operator. The ? in ruby ​​can be used in function names to indicate a judgment. For example, include? means whether to include

Answer 2

Convention in ruby?结束的方法名返回值是true/false