Created
December 8, 2017 13:03
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| const state1 = countReducer(undefined, {TYPE: '@@redux/INIT'}) | |
| // the initial state was set in defaultState and its value is 100 | |
| // ⇒ state1 === 100 | |
| const state2 = countReducer(state1, increaseBy(100)) | |
| // ⇒ state2 === 200 | |
| const state3 = countReducer(state2, increaseBy(-500)) | |
| // ⇒ state3 === -300 | |
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