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//数组中存在数值大于10的
var points = [40, 100, 1, 5, 25, 10];

// 找到数组中的出现次数最多的元素和出现次数。
var countArr = [1, 2, 3, 4, 1, 4, 4];

// 把strToArr转到['a','b','c','e','f']
var strToArr = 'abcdefg';

// 把arrToStr转到'abcdefg'
var arrToStr = ['a', 'b', 'c', 'e', 'f']

// 合并两个数组mergeArr1和mergeArr2, 结果为['a','b','c','e','f']
var mergeArr1 = ['a', 'b', 'c'];
var mergeArr2 = ['e', 'f'];

// 去重
var uniqueArr = [1, 1, 8, 8, 12, 12, 15, 15, 16, 16];

// 1。找出年龄大于等于20的列表
// 2。打印出年龄大于20用户的oppo手机价格
var users = [{
    name: 'lili', age: 10, smartproduct: [
        { name: 'iphone', price: 7000 },
        { name: 'iwatch', price: 1000 },
    ]
}, {
    name: 'gaga', age: 20, smartproduct: [
        { name: 'oppo', price: 6000 },
        { name: 'vivo', price: 5000 },
    ]
}, {
    name: 'hehe', age: 30, smartproduct: [
        { name: 'oppo', price: 4000 },
        { name: 'vivo', price: 2000 },
    ]
}];

// trasTo转到[{value: 1},{value: 2},{value: 3},{value: 4}...]
var trasTo = [1, 2, 3, 4, 5, 6]