Reducer content

gistfile1.txt

 let array = [1,2,3,4,5]
  10 + 1
  11 + 2
  13 + 3
  16 + 4
  20 + 5

  let initialState = {
    count: 0,
    cake: 'fishy'
  }

  // dispatch
  let actions = [
    { type: "ADD", by: 40 },
    { type: "MINUS", by: 10 },
    { type: "BAKE_CAKE" }
  ]

  let reducer = (state, action) => {
    switch(action.type) {
      case "ADD": {
        return {...state, count: state.count + action.by}
      }
      case "MINUS": {
        return {...state, count: state.count - action.by}
      }
      case "BAKE_CAKE": {
        return { ...state, cake: "a lie" }
      }
      default: {
        return state
      }
    }
  }

  let sum = actions.reduce(reducer, initialState)