jzDev

const placeholderReducer = (state = null) => state;
let reducers = {};

export default {
  getReducers() {
    return { ...reducers };
  },
  // Preserve initial state for not-yet-loaded reducers
  getInitialReducer(initialReducers, initialState) {
    const reducerNames = Object.keys(initialReducers);

jzDev

class BinaryTreeNode {
  constructor(value) {
    this.value = value;
    this.left = null;
    this.right = null;
  }

  insertLeft(value) {
    this.left = new BinaryTreeNode(value);
    return this.left;