gistfile1.js

let initialState = Immutable.Map({count:1, b:2, c:3});


function counter(state = initialState, action) {
  switch (action.type) {
  case 'INCREMENT':
      return state.set('count',state.get('count')+1);
  case 'DECREMENT':
	  return state.set('count',state.get('count')-1);
  default:
      return state;
  }
}
let store = createStore(counter);
store.subscribe(() =>{
	console.log(store.getState());
});

store.subscribe(() =>{
	console.log("another subscribe:",store.getState());
});

store.dispatch({ type: 'INCREMENT' });
// 1
store.dispatch({ type: 'INCREMENT' });
// 2
store.dispatch({ type: 'DECREMENT' });