Learning Redux

Updating items

To update items, we can use Array.map to loop through all items, and then only edit certain items:

const updateItem = (state = [], action) => {  const i = action.index  const editedData = action.item  return state.map((item, index) => {    // we do not care about this item, skip    if (index !== i) return item    // we want to edit this item    return { ...item, ...editedData }  })}