swich的巧用

一般来说swich都是这么写的，但有时候我们需要一些其他的需求，比如说只要一个区间工作日，假期

var x;
var d=new Date().getDay();
switch (d)
  {
  case 0:
    x="Today it's Sunday";
    break;
  case 1:
    x="Today it's Monday";
    break;
  case 2:
    x="Today it's Tuesday";
    break;
  case 3:
    x="Today it's Wednesday";
    break;
  case 4:
    x="Today it's Thursday";
    break;
  case 5:
    x="Today it's Friday";
    break;
  case 6:
    x="Today it's Saturday";
    break;
  }

这样我们就会有另外一种写法

var x;
var d=new Date().getDay();
switch (true)
  {
  case d===0||d===6:
    x="假期";
    break;
  case 0<d<6:
    x="工作日";
    break;
  }