Redux helpers

gistfile1.js

const createAction = (type) => {
  return (payload) => ({type, payload})
}

const createReducer = (initState, handlers) => {
  return (state = initState, action) => {
    const actionHandler = handlers[action.type];
    if (actionHandler) {
      const result = actionHandler(state, action.payload);
      return Object.assign({}, state, result);
    }
    return state;
  };
};


// Example usage
const increment = createAction('INCREMENT');
const postsReducer = createReducer({count: 0]}, {
  'INCREMENT': (state, incrementNumber) => ({count: state.count + incrementNumber})
});