尝试将表达式括起来，明确说出你想要的内容：&& 的优先级高于 || 所以

Try bracketing the expression so it explicitly says what you want: && has a higher precedence than || so

A || b && c

被评估为

a || (b && c)

不是

(a || b) && c

没有括号来明确说出你想要的东西，你可能得不到它！

Without brackets to explicitly say what you want, you may not get it!