对于Map,我们可以使用forEach方法或for...of循环。 示例代码: constmap=newMap([['name','Alice'],['age',30],['city','New York']]);// 使用 forEach 遍历map.forEach((value,key)=>{console.log(`Key:${key}, Value:${value}`);});// 使用 for..
IntrinsicJSON(ctx);JS_AddIntrinsicProxy(ctx);JS_AddIntrinsicMapSet(ctx);JS_AddIntrinsicTypedArrays(ctx);JS_AddIntrinsicPromise(ctx);JS_AddIntrinsicBigInt(ctx);returnctx;}intmain(int argc,char**argv){JSRuntime*rt;JSContext*ctx;rt=JS_NewRuntime();js_std_set_worker_new_context_func(JS_New...
Map services contain one or more sublayers. Sublayers may even contain nested sublayers. When the sublayers property of the MapImageLayer is not specified, then an image of all sublayers in the service is exported to the client. If a subset of sublayers from the service are specified, th...
createLayerFromFootprint(footprint); // Add the layer to the map map.add(layerFromFootprint); // back out of the catalog layer list to the main layer list layerList.openedLayers.pop(); } } ); // Use reactiveUtils to watch for a selected item in the layerList.catalogLayerList ...
if("my bike"inmyTranslation)... 循环: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 vari=0,key="",keys=[];keys=Object.keys(m);for(i=0;i<keys.length;i++){key=keys[i];console.log(m[key]);} 如果map 较小可使用foreach 语句: ...
TheendsWith()method returnstrueif a string ends with a specified value, otherwisefalse: Example vartext ="John Doe"; text.endsWith("Doe")// Returns true Try it Yourself » Array entries() Example Create an Array Iterator, and then iterate over the key/value pairs: ...
forIn():key 会变成字符串类型,包括数组的私有属性 let arr = [1,2,3,4,5];for(let keyinarr) {console.log(key); } forOf():支持return,break,continue,并且是值 of 数组(不能遍历对象) let arr = [1,2,3,4,5];for(let val of arr) { ...
entries()Returns a key/value pair Array Iteration Object every()Checks if every element in an array pass a test fill()Fill the elements in an array with a static value filter()Creates a new array with every element in an array that pass a test ...
for (const chunk of movieChunks) { const putRequests = chunk.map((movie) => ({ PutRequest: { Item: movie, }, })); const command = new BatchWriteCommand({ RequestItems: { // An existing table is required. A composite key of 'title' and 'year' is recommended // ...
Leaflet|©OpenStreetMapcontributors Here we create a map in the'map'div, addtiles of our choice, and then add a marker with some text in a popup: var map = L.map('map').setView([51.505, -0.09], 13); L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', { attr...