HOC Page

https://reactjs.org/docs/higher-order-components.html#use-hocs-for-cross-cutting-concerns gives example about HOC, here selectData is passed as second parameter. This parameter is a arraylist returned by a function, but is used again as a function. I am bit confused with this line:
data: selectData(DataSource, this.props), as firstly it should not be a function, secondly why it will need dataSource again as its wrapper function is filtering it already and what it will get in this.props.

從連結的 Higher-Order Components 文件章節開始，尤其是查看包含 selectData(DataSource, this.props) 的範例。釐清 selectData 是否為函式，並說明 DataSource 和 this.props 的作用；完成的標準是該範例不再讓這些參數的用法令人困惑。