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title: Reducers
localeTitle: 减速
### Redux中的减速器有哪些？
Reducers是执行动作和先前状态并返回新状态的纯函数。给定相同的输入，reducer应始终返回相同的输出。 1
### 来源
1. http://redux.js.org/docs/basics/Reducers.html