• Swift advanced — the use of map and flatmap


    Map and flatmap are mainly used in collections and optional types. Let’s look at them respectively. Using map and flatmap on a collection First look at the following code: func getInfos(by name: String) -> [String] { if name == “Jack” { return [“Male”, “25”, “New York”] } else if name == “Lucy” { return [“Female”, […]

  • When automatic driving encounters 5g, what kind of spark will it produce? This article is clear


    Author: Li Tianyi, Huawei cloud EI expert Abstract driverless driving is a way to drive a car partially or completely instead of a human driver through an automatic driving system. The autopilot system is a complex system of hardware and software that covers multiple functional modules and various technologies. This article will discuss the issue […]

  • Nodejs crawler real combat project chain home


    explain As a front-end sector of primary school students, always want to do some projects to the whole stack efforts.The worry is that there is no backstage. After searching, I learned to write nodejs and express as local interfaces to call the front page.But where does the data come from?Someone said, “mockjs to generate!”OK, introduce […]

  • Cesium system learning (1)


    (1) Concept and definition of cesium  Cesium is a foreign map engine based on JavaScript and webgl. Cesium supports 3D, 2D, 2.5D map display, can draw graphics, highlight areas, and provide good touch support, and supports most browsers and mobile. Cesium JS is an open source JavaScript library for creating world-class 3D Earth and map […]

  • Recommend 6 wechat app weather interfaces API


    A few days ago, in the process of developing weather applet, I found some weather API service providers on the Internet and commented on them by the way; It is found that both Gaode and Baidu provide relevant interfaces. No1, Gaode map Gaode map has been providing map services to small programs since January 17, […]

  • Real time and up-to-date geojson map data of provinces, cities, counties and streets in China


    Found a free download across the country   geojson   Data website, recommend it. Support national, provincial, municipal, district / county, street / township and all levels of linkage data Geojson data download address:https://hxkj.vip/demo/echartsMap/ GitHub address of the project:https://github.com/TangSY/echarts-map-demoIf you like, you can give it to a star 1、 Through API interface, the latest geojson […]

  • Recommend three wechat app map interfaces API


    No1, Tencent map ][2] Tencent map’s interface is limited daily adjustment amount: 10000 times / key, concurrent number: 5 times / key / second. However, the official did not provide a demo NO2, Gaode map Gaode map tutorial is good, the official demo and demo small procedures No3, baidu map Baidu is the same as […]

  • Express 100 map track query API interface case


    1、 Express query map track 1.1 interface format Provide unified HTTP post or get call interface, and return format, support JSON, XML, text, HTML data. 1.2 request address https://poll.kuaidi100.com/po… Request parameters: Parameter name Is it required type explain customer yes string Authorization code, pleaseApply for Enterprise Editionobtain sign yes string The signature is used to […]

  • Using leafet to select screenshots


    We want to realize some functions similar to web page screenshots, such as the followingWe need help leaflet-draw html2canvas Project preview address html <!– Load Leaflet from CDN–> <script src=’https://api.tiles.mapbox.com/mapbox.js/v2.1.6/mapbox.js’></script> <link href=’https://api.tiles.mapbox.com/mapbox.js/v2.1.6/mapbox.css’ rel=’stylesheet’ /> <link href=’https://api.tiles.mapbox.com/mapbox.js/plugins/leaflet-draw/v0.2.2/leaflet.draw.css’ rel=’stylesheet’ /> <script src=’https://api.tiles.mapbox.com/mapbox.js/plugins/leaflet-draw/v0.2.2/leaflet.draw.js’></script> <!– Load Esri Leaflet from CDN –> <script></script> <script ></script> <div id=”map”></div> css #map { […]

  • Realization of timing highlight and click event of 3D map based on ecarts


    Technology selection The selected technology stack: Vue, ecarts, ecarts GL Install Vue and ecarts 1. Installation of ecarts and ecarts al npm i echarts –save npm i echarts-gl –save 2. Ecarts and ecarts GL are cited import echarts from ‘echarts’; import ‘echarts-gl’ Vue.prototype.$echarts = echarts 3. Page introduction require(‘../../node_modules/echarts/map/js/china’) At this point, the map message […]

  • Baidu map a team recruitment front end Engineer


    Job title: web front end R & D Engineer (T3-T4) operating duty: Realize the product effect with interactive design and visual design of map products Participate in map product experience Optimization and performance optimization Explore new technology of web front end and apply it to product development Job requirements:More than 1.1 years of Web front-end […]

  • Several points that need to be paid attention to when using map in golang


    1. Introduction Map is a convenient and powerful built-in data structure in golang. It is an unordered group of elements of the same type, and the elements are indexed by a unique key of another type. The key can be of any type supported by the equality operator, such as integer, floating-point number, complex number, […]