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TreeData.count() method

计算符合条件的节点个数。不给出条件则计算所有节点的个数。

Signature:

count(predicate?: (payload: TreeDataTraverseFnPayload<TNode>) => boolean): number;

Parameters

Parameter	Type	Description
predicate	(payload: TreeDataTraverseFnPayload<TNode>) => boolean	(Optional) 条件

Returns:

number

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