ngrx code example for medium article

ma1-ngrx-reducer.js

export function reducer(
    state: State, action: Rate.Actions | Rates.Actions): State {
    switch (action.type) {
        case Rates.ActionTypes.LOAD: {
            const rates = action.payload;
            // return new state
        }
        case Rates.ActionTypes.LOAD_SUCCESS: {
            const rates = action.payload;
            // return new state
        }
        case Rate.ActionTypes.SELECT: {
            const rate = action.payload;
            // return new state
        }
        default: { return state; }
    }
}