Js可定义位数的十进制转二进制

 1 // 十进制转二进制
 2       function binary (num, Bits) {
 3         var d = parseInt(num / 2)
 4         var resArry = [num % 2]
 5         for(; d != 0; ) {
 6           d = parseInt(d / 2)
 7           resArry.push(d % 2)
 8         }
 9         if (Bits) {
10           for(var r = resArry.length; r < Bits; r++) {
11            resArry.unshift(0)
12           }
13         }
14         return resArry.join().replace(/,/g, ‘‘)
15       }
16       console.log(binary(348, 16))