A_Rocky的博客

npm install -g create-react-app create-react-app myApp npm install --save redux npm install --save react-redux npm install --save react-router npm install --save redux-saga npm install --save isomorphi

Object.assign({}, oldObj, {changeProp: newValue})```JavaScript return { ...oldObj, changeProp: newValue }; ```

修改其中的一个元素return [...list.slice(0, index), list[index] + 1, ...list.slice(index + 1)] 删除一个元素`return […list.slice(0, index), …list.slice(index + 1)] 增加一个元素return [...list, 22]