Javascript如果不是速记的话则一行混淆

Question

var type = ''; // type is from somewhere
if(type == 'a'){
type = 1;
}else{
type = 2;
}

How to simplify above if else statement using JS shorthand?

Answer 1

我不确定“ JS简写”是什么意思，但也许您正在寻找三元条件运算符 ？

type = (type == 'a') ? 1 : 2;

Answer 2

You can use the ternary operator, also called the conditional operator, inline if (iif), or ternary if. In your example, this would look like the following:

type = type == 'a' ? 1 : 2;

More info on Wikipedia: http://en.wikipedia.org/wiki/%3F:

Answer 3

除了三元数之外，您还有更多选择，尤其是考虑到1不是虚假的时

type = {'a': 1}[type] || 2;