查找 OpenLayers 數組的索引

Question

我很難找到這個特定 OpenLayers 數組的索引。 數組看起來像這樣。

Array(7)
0: PinchRotate {disposed_: false, pendingRemovals_: {…}, dispatching_: {…}, listeners_: {…}, 
revision_: 0, …}
1: PinchZoom {disposed_: false, pendingRemovals_: {…}, dispatching_: {…}, listeners_: {…}, revision_: 
0, …}
2: KeyboardPan {disposed_: false, pendingRemovals_: {…}, dispatching_: {…}, listeners_: {…}, 
revision_: 0, …}
3: KeyboardZoom {disposed_: false, pendingRemovals_: {…}, dispatching_: {…}, listeners_: {…}, 
revision_: 0, …}
4: MouseWheelZoom {disposed_: false, pendingRemovals_: {…}, dispatching_: {…}, listeners_: {…}, 
revision_: 0, …}
5: DragBox {disposed_: false, pendingRemovals_: {…}, dispatching_: {…}, listeners_: {…}, revision_: 
0, …}
6: PointerInteraction {disposed_: false, pendingRemovals_: {…}, dispatching_: {…}, listeners_: {…}, 
revision_: 0, …}

我正在嘗試找到索引項 = "DragBox" 的索引

我試過一個字符串和一個對象，即

let index =  MapValues.map.interactions.array_.indexOf("DragBox");

let obj = DragBox
let index =  MapValues.map.interactions.array_.indexOf(obj);

兩者都返回了 -1 ......我真的很困惑如何用打字稿中的這個特定數組來做到這一點。

任何幫助是極大的贊賞

Answer 1

要在數組中搜索特定類型的對象，可以使用

.findIndex(obj => obj instanceof DragBox)