如何将参数传递给 createSelector 的结果函数（重新选择）

Question

我的 redux store 有两个独立的切片 A 和 B，

我需要一个记忆的选择器，它 returns 从 B 派生的东西，只有当 A 改变时。

例如

const getSliceA = (state) => state.A

export const getSliceB = createSelector(
 getSliceA,
 (a) => {  return MyDerive(state.B) }
)

我的问题是如何将状态或 state.B 发送到 resultFunc。

Answer 1

const compareBySliceA = (prevSate: RootState, newState: RootState) => {
    // This is just an example you can compare inner of Slice A
    if (newState.SliceA === prevState.SliceB) {
        return true
    }   
    return false;
};

const getDerivedSliceB (state: RootState): List<any> => 
    state.SliceB.filter(ElementB => ElementB.visible) 


const createComparatorSelector = createSelectorCreator(
  defaultMemoize,
  compareBySliceA,
);


 export const myDeepSelector = createComparatorSelector(
  (state: RootState) => state,
  (state: RootState): List<any> => getDerivedSliceB(state),
);

compareBySliceA和getDerivedSliceB都需要共同的parent，即上面例子中的State是SliceA和SliceB的parnet。

如何将参数传递给 createSelector 的结果函数（重新选择）

How to pass parameters to the result Function of a createSelector (reselect)

redux

reselect