【前端开发】GIS及JS题目

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
    </head>
    <body>
        <script>
            var aaa = {}
            aaa.q111 = '1111'
            console.log(aaa);
 
            const bbb = {}
            bbb.q111 = '1111'
            console.log(bbb);
 
 
            function getQueryVariable(variable) {
                var query = window.location.search.substring(1);
                var vars = query.split("&");
                for (var i = 0; i < vars.length; i++) {
                    var pair = vars[i].split("=");
                    if (pair[0] == variable) {
                        return pair[1];
                    }
                }
                return (false);
            }
 
            var obj = {
                name: "abc",
                age: 123,
                card: ['visa', 'master'],
                wife: {
                    name: 'bcd',
                    son: {
                        name: 'aaa'
                    }
                }
            }
 
            console.log(obj)
 
            var obj1 = obj;
            obj1.fff = "2222"
 
            console.log(obj1);
 
            var obj1 = {
 
            }
            //深度拷贝
            function deepClone(origin, target) {
                var target = target || {},
                    toStr = Object.prototype.toString,
                    arrStr = "[object Array]";
                for (var prop in origin) {
                    if (origin.hasOwnProperty(prop)) {
                        if (origin[prop] !== "null" && typeof(origin[prop]) == 'object') {
                            // if (toStr.call(origin[prop]) == arrStr) {
                            //     target[prop] = [];
                            // } else {
                            //     target[prop] = {};
                            // }
                            target[prop] = toStr.call(origin[prop]) == arrStr ? [] : {};
                            deepClone(origin[prop], target[prop]);
                        } else {
                            target[prop] = origin[prop];
                        }
                    }
                }
                return target;
            }
            deepClone(obj, obj1);
 
            console.log(obj1)
        </script>
    </body>
</html>

1、URL解析:正则或字符串分割

2、值和引用:地址

3、拷贝:递归、取值赋值

4、Multipolygon、polygon

5、leaflet-geojson:图层顺序,拷贝数据附加

posted @   咸鱼翻身  阅读(115)  评论(0编辑  收藏  举报
编辑推荐:
· Linux系列:如何用 C#调用 C方法造成内存泄露
· AI与.NET技术实操系列(二):开始使用ML.NET
· 记一次.NET内存居高不下排查解决与启示
· 探究高空视频全景AR技术的实现原理
· 理解Rust引用及其生命周期标识(上)
阅读排行:
· 物流快递公司核心技术能力-地址解析分单基础技术分享
· .NET 10首个预览版发布:重大改进与新特性概览!
· 单线程的Redis速度为什么快?
· 展开说说关于C#中ORM框架的用法!
· Pantheons:用 TypeScript 打造主流大模型对话的一站式集成库
历史上的今天:
2018-12-04 【Python】paddlepaddle docker python2.7 centos运行
2017-12-04 【Android】java.lang.RuntimeException: java.lang.Throwable: A WebView method was called on thread 'JavaBridge'.
点击右上角即可分享
微信分享提示