ruby中的布尔逻辑'true和false == true'

Question

> test = false and true
=> false
> test
=> false
> test = true and false #this is the point I don't understand!
=> false
> test
=> true

为什么ruby会以这种方式运行？如何正确使用它以避免遇到此问题？

Answer 1

优先级. test = true and false意思是:

(test = true) and false  

不是这个:

test = (true and false)

使用如上面括号,或&&代替and,如果你想分配给放在最后:

test = true && false