这个redux减速器可以吗 [英] Is this redux reducer OK

问题描述

这个减速器好吗?

function someReducer(state = initialState, action) {
   if (action.type === SOME_ACTION) {
      const newState = Object.assign( {}, state );
      // ...
      // doing whatever I want with newState 
      // ...
      return newState;
   }   
   return state;
}

如果可以，为什么我们需要所有那些不变的库来使我们的生活复杂化.

and if is OK, why we need all those immutable libraries to complicate our lives.

p.s 只是试图理解Redux和不变性

p.s Just trying to comprehend Redux and immutability

推荐答案

export default function (state = initialState, action) {

  const actions = {
    SOME_ACTION: () => {
      return {
        ...state
      }
    },
    ANOTHER_ACTION: () => {
      return {
        ...state
        error: action.error
      }
    },
    DEFAULT: () => state;
  }
  
  return actions[action.type] ? actions[action.type]() : actions.DEFAULT(); 
}

我宁愿这样做.我不是switch语句的忠实拥护者.

I prefer doing this instead. I am not a big fan of switch statements.

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