}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...
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...
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'...
firstconstsecond=newMap([[1,"uno"],[2,"dos"],]);// Map 对象同数组进行合并时,如果有重复的键值,则后面的会覆盖前面的。constmerged=newMap([...first,...second,[1,"eins"]]);console.log(merged.get(1));// einsconsole.log(merged.get(2));// dosconsole.log(merged.get(3));// thre...
visible = false; // Watch for changes in the layer's visibility // and set the visibility of another layer when it changes reactiveUtils.watch( () => layer.visible, (visible) => { if (visible) { anotherLayer.visible = true; } else { anotherLayer.visible = false; } } ); Method ...
* 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 ...
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":...
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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 ...
sampleSet: polymerize Identity Kit Archived identity Overview AddressClient Address AddressApiException AddressConstants.Extras identity.entity Overview UserAddressRequest GetUserAddressResult UserAddress In-App Purchases Archived Client APIs iap.entity Overview ConsumeOwnedPurchaseReq ...