我尝试检索数组中en元素的索引。
这完美无缺
var onCreate = function (event) {
console.assert(markers[markerId] === undefined);
var markerId = event.markerId;
markers[markerId] = {};
var marker = markers[markerId];
// create the container object
marker.object3d = new THREE.Object3D();
marker.object3d.matrixAutoUpdate = false;
scene.add(marker.object3d);
//UPDATE ARRAY HOLDING CURRENT MARKERS
console.log("ON CREATE");
console.log("current detected markers: " + currentMarkers);
var idx = currentMarkers.indexOf(markerId); // Find the index
console.log("marker " + event.markerId + " has index: " + idx);
if(idx==-1) // if does not exist
currentMarkers.push(markerId);
但这不......
var onDelete = function (event) {
console.assert(markers[event.markerId] !== undefined);
var markerId = event.markerId;
//UPDATE ARRAY HOLDING CURRENT MARKERS
console.log("ON DELETE");
console.log("current detected markers: " + currentMarkers);
var idxx = currentMarkers.indexOf(markerId); // Find the index
console.log("marker " + markerId + " has index: " + idxx);
if(idxx != -1) {// if DOES exist
currentMarkers.splice(idxx, 1); //Delete
var idxxx = currentMarkersCoverChecked.indexOf(markerId); // Find the index
if(idxxx == -1) // if does NOT exist, so if not being checked
checkMarkerCovered(markerId);
}
onDeleteRandom(markerId);
var marker = markers[markerId];
scene.remove(marker.object3d);
delete markers[markerId];
查看我的控制台输出:
ON CREATE
current detected markers: 2,1,4
marker 3 has index: -1
ON CREATE main.js:266
current detected markers: 2,1,4,3
marker 4 has index: 2
ON DELETE
current detected markers: 2,1,4,3
marker 2 has index: -1
ON CREATE
current detected markers: 2,1,4,3
marker 2 has index: 0
ON DELETE
current detected markers: 2,1,4,3
marker 1 has index: -1
答案 0 :(得分:1)
您是否已在markerId
JavaScript Array允许您将Integer
类型以及String
类型和Object
类型插入Array
。如果某个值属于Integer
类型,并且您尝试indexOf("stringvalue");
,则可能会获得-1 as return value
希望这可以帮助您解决问题!
答案 1 :(得分:0)
第二个示例不起作用,因为currentMarkersCoverChecked
未定义。