}for(varxofs) {// 遍历Setalert(x); }for(varxofm) {// 遍历Mapalert(x[0] +'='+ x[1]); } for ... of和for ... in区别 for ... in循环由于历史遗留问题,它遍历的实际上是对象的属性名称。一个Array数组实际上也是一个对象,它的每个元素的索引被视为一个属性。 当我们手动给Array对象添...
请注意,for ... in对Array的循环得到的是String而不是Number。 for ... of循环是ES6引入的新的语法:用for ... of循环遍历集合,用法如下: 1 2 3 4 5 6 7 8 9 10 11 12 vara = ['A','B','C']; vars =newSet(['A','B','C']); varm =newMap([[1,'x'], [2,'y'], [3,'z'...
比如,对象原型的toString方法,以及数组的length属性,就通过这种手段,不会被for...in遍历到。 for...of for of 是es6引新引入的特性,修复了es5引入的for in 的不足。 for...of 只可遍历可迭代对象,for...of 语句在可迭代对象(包括Array,Map,Set,String,TypedArray,arguments 对象等等)上创建一个迭代循环,调...
If set to false : When the map is zoomed out far enough that a single representation of the world does not fill the map's entire container, there will be blank space beyond 180 and -180 degrees longitude. Features that cross 180 and -180 degrees longitude will be cut in two (with ...
Set featureEffect property if different effects need to be applied features that meet or fail a specified filter. If all of the following four properties are applied, then they will be applied in this order: featureEffect, effect, opacity and blendMode. Known Limitations The effect is not suppo...
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规范 Specification ECMAScript® 2026 Language Specification #sec-map-objects 参见 core-js中Map的 polyfill Set WeakMap WeakSet Ad
case"AndrWeiboType":l.iframeCallup(e),u&&l.downloadAndrFromMarket(a);break;case"IosWeiboType":l.iframeCallup(e),u&&l.jumpToDownloadPage();break;case"IosWeixinType":l.jumpToMiddlePage(a);break;case"IosBaiduBoxType":l.iframeCallup(e),u&&l.downloadIosPkg(a);break;case"SetPopupType":...
The basemap is a set of layers that give geographic context to the MapView or SceneView and the other operational layers in the map. The basemap can be created in a variety of ways: From the basemap styles service (v2) From an instance of the Basemap class From a basemap id Use of ...
* Computes key.hashCode() and spreads (XORs) higher bits of hash * to lower. Because the table uses power-of-two masking, sets of * hashes that vary only in bits above the current mask will * always collide. (Among known examples are sets of Float keys ...