最高和最低

得到一串用空格分隔的数字，并且必须返回最高和最低数字

function highAndLow(numbers) {
var numbers = numbers.split(" ")
var sum = []
var test = " "
for (var i = 0; i < numbers.length; i++) {
sum.push(Number(numbers[i]))
}
var max = Math.max.apply(null, sum); //最大值
var min = Math.min.apply(null, sum); //最小值
return max + test + min
}

//测试
console.log(highAndLow("4 5 29 54 4 0 -214 542 -64 1 -3 6 -6")) //542 -214