arr.sort()方法的使用记录

var points = [40, 100, 1, 5, 25, 10];
points.sort(function(a, b) {
    return a - b; //升序
});
console.log(points); //[1, 5, 10, 25, 40, 100]

points.sort(function(a, b) {
    return b - a; //降序
});
console.log(points); //[100, 40, 25, 10, 5, 1]

console.log('数组的最大值：' + Math.max.apply(null, points));