redux-from-the-trenches-6.js

// 1 - instead of
const state = {
  users: [
    { id: 1, name: "Bat", groups: [{ name: "admin" }, { name: "regular" }] },
    { id: 2, name: "Vince", groups: { name: "admin" } },
    { id: 1, name: "Romain", groups: { name: "normal" } }
  ]
};

// 2- Normalize and index by primary key
const state = {
  users: {
    1: { id: 1, name: "Bat", groups: [1, 2] },
    2: { id: 2, name: "Vince", groups: [1] },
    3: { id: 3, name: "Romain", groups: [2] }
  },
  groups: {
    1: { id: 1, name: "admin" },
    2: { id: 2, name: "regular" }
  }
};