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                                            fikyair

第 3 题：什么是防抖和节流？有什么区别？如何实现？

防抖动是将多次执行变为最后一次执行，节流是将多次执行变成每隔一段时间执行。

第 2 题：['1', '2', '3'].map(parseInt) what & why ?

cue 一下=> [此楼为最佳解答](https://github.com/Advanced-Frontend/Daily-Interview-Question/issues/4#issuecomment-478933664)

flutter_test any from sdk which doesn't exist (the Flutter SDK is not available), version solving failed. Flutter users should run `flutter pub get` instead of `pub get`.

> HELP HELP HELP !!!!!! > > Because levana depends on integration_test any from sdk which doesn't exist (could not find package integration_test in the Flutter SDK), version solving failed....

节点如果是A->B,C->B，并且设置 expandHolderPosition 和 expanded，似乎树的渲染有问题

确实是这样，我原意这样设置是想表示：如果该结点有子结点，就要expandHolderPosition:'right'，没有则expandHolderPosition：false/hide，并且，该结点有子结点 expaned 设置为 true，没有子结点设置为 false。但是发现一种特殊的情况：A的子结点有B，C的子结点也有B，也就是 A->B,C->B ，这种情况下，图谱应该是认为，B是共同父结点了，所以会展示成上述的样子，请问还有两全的方法么