log(ele)) //Uncaught TypeError: map.map is not a function 2.2 Map 缺点和 WeakMap 优点 1.赋值和搜索操作都是 O(n) 的时间复杂度,因为这两个操作都需要遍历全部整个数组来进行匹配。 2.可能会导致内存泄漏,因为数组会一直引用着每个键和值。 相比之下, WeakMap 持有的是每个键对象的 “弱引用”,这...
require(["esri/layers/MapImageLayer"], function(MapImageLayer){ // points to the states layer in a service storing U.S. census data let layer = new MapImageLayer({ url: "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer" }); map.add(layer); // adds the ...
Example require([ "esri/WebMap" ], function( WebMap ) { const map = new WebMap({ portalItem: { id: "e691172598f04ea8881cd2a4adaa45ba" } }); map.load() .then(function() { // load the basemap to get its layers created return map.basemap.load(); }) .then(function() { //...
fruits.forEach(function(value, key) { text += key +' = '+ value; }) Try it Yourself » Map.entries() Theentries()method returns an iterator object with the [key,values] in a map: Example // List all entries lettext =""; ...
If zoom is not specified in the constructor options, Mapbox GL JS will look for it in the map's style object. If it is not specified in the style, either, it will default to 0 . Example const map = new mapboxgl.Map({ container: 'map', center: [-122.420679, 37.772537], zoom:...
Change an existing feature on your map in realtime by updating its data. Use a custom camera animation with a geocoder Use camera animation options with the mapbox-gl-geocoder to create a custom animation when the user selects a search result. Use a custom render function with a geocoder...
functionspinGlobe(){ constzoom=map.getZoom(); if(spinEnabled&&!userInteracting&&zoom<maxSpinZoom){ letdistancePerSecond=360/secondsPerRevolution; if(zoom>slowSpinZoom){ // Slow spinning at higher zooms constzoomDif= (maxSpinZoom-zoom)/(maxSpinZoom-slowSpinZoom); ...
We use essential cookies for the website to function, as well as analytics cookies for analyzing and creating statistics of the website performance. To agree to the use of analytics cookies, click "Accept All". You can manage your preferences at any time by clicking "Cookie Settings" on ...
HUAWEI ID Sign-In via ID Token (OpenID Connect) HUAWEI ID Sign-In via Authorization Code (OAuth 2.0) Quick HUAWEI ID Sign-In to Apps That Apply for Only the OpenID or UnionID Function-based Development Signing In with an ID Silently Signing In with an ID Signing Out of an ID...
APIs and SDKs for AI-powered maps, location search, turn-by-turn navigation, and geospatial data in mobile or web apps. Get started for free.