translate store/*.md #4
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WallenHan
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Mar 16, 2018
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| ### Using selectors for multiple pieces of state | ||
| `createSelector` 可以用来根据同一状态的几个切片从状态中选取一些数据。 |
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pieces 译成 切片 有点不太妥，这里应该是指 featureReducer 里面的 state， 译成 用 选择器来选择state 中的部分内容。
WallenHan
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Mar 16, 2018
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| You can use the `createSelector` to achieve just that. Your visible books will always be up to date even if you update them in `allBooks` and they will always show the books that belong to your user if there is one selected, and will show all the books when there is no user selected. | ||
| 你可以使用 `createSelector` 来实现这一点。只要有被选择的用户，可见的书籍将始终处于最新状态，甚至当你在 `allBooks` 中更新了它们。如果没有用户被选择则显示所有的书籍。 |
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这里有一些拗口，但是意思达到了。而且我也没想到更顺的语句。
WallenHan
reviewed
Mar 16, 2018
| The functions returned by the `createSelector` and `createFeatureSelector` methods become alternatives to the string syntax for retrieving the relevant piece of state. | ||
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| ### Example | ||
| ## 通过 Store 使用选择器 |
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Using a Selector with the Store
或许译为
在 Store 中使用 选择器 （Selector）
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translated the rest of the store directory