如何从Redux中仅删除数组中的一个元素？暂时不为我工作

// 定义action类型
const REMOVE_ITEM = "REMOVE_ITEM";

// 创建action创建函数
const removeItem = (index) => {
  return {
    type: REMOVE_ITEM,
    payload: index
  };
};

// Redux的reducer
const reducer = (state = [], action) => {
  switch (action.type) {
    case REMOVE_ITEM:
      return state.slice(0, action.payload).concat(state.slice(action.payload + 1));
    default:
      return state;
  }
};

// 组件
class MyComponent extends React.Component {
  handleRemoveItem = (index) => {
    this.props.removeItem(index);
  };

  render() {
    return (
      <div>
        {this.props.items.map((item, index) => (
          <div key={index}>
            {item}
            <button onClick={() => this.handleRemoveItem(index)}>删除</button>
          </div>
        ))}
      </div>
    );
  }
}

// 将state和action绑定到组件的props上
const mapStateToProps = (state) => {
  return {
    items: state
  };
};

const mapDispatchToProps = {
  removeItem
};

export default connect(mapStateToProps, mapDispatchToProps)(MyComponent);