Javascript速记

Question

如果我可以说：

var big = (x > 10) ? true : false;

而不是：

var big;
if (x > 10) {
    big = true;
}
else {
    big = false;
}

我如何让这段话变得同样简短？

var now = new Date

if (now.getHours() < 5) {
    return "late night pick me up";
}
else if (now.getHours() < 9) {
    return "breakfast";
}
else if (now.getHours() < 13) {
    return "lunch";
}
else if (now.getHours() < 17) {
    return "afternoon snak";
}
else {
    return "dinner";
}

非常感谢！

Answer 1

如果没有一堆杂乱无章的嵌套三元运算符，你就做不到。三元运算符只适用于一行。

Answer 2

var now = new Date().getHours();

return now < 5 ? "late night pick me up" :
       now < 9 ? "breakfast" :
       now < 13 ? "lunch" :
       now < 17 ? "afternoon snak" : "dinner";

Answer 3

你不能速记，就我个人而言，我会这样写：

if (now.getHours() < 5) return "late night pick me up";
else if (now.getHours() < 9) return "breakfast";
else if (now.getHours() < 13) return "lunch";
else if (now.getHours() < 17) return "afternoon snak";
else return "dinner";

还不算太坏吧？