求数组的最大值和最小值

循环遍历

var arr = [6, 4, 1, 8, 2, 11, 23]

var result = arr[0]
for (var i = 1; i < arr.length; i++) {
  result = Math.max(result, arr[i])
}
console.log(result)

排序

var arr = [6, 4, 1, 8, 2, 11, 23]

arr.sort(function(a, b) {
  return a - b
})
console.log(arr[arr.length - 1])

apply

var arr = [6, 4, 1, 8, 2, 11, 23]
console.log(Math.max.apply(null, arr))

es6

var arr = [6, 4, 1, 8, 2, 11, 23]
console.log(Math.max(...arr))
//等价于apply