react-entities/es/utils.js

React Entities - the simplest app state management for React

/* Basic selectors */
export var selectAll = function selectAll(state) {
  return state;
};
export var selectNone = function selectNone(_) {
  return null;
};
/* Basic equality functions */

export var strictEqual = function strictEqual(a, b) {
  return a === b;
};
export var shallowEqual = function shallowEqual(a, b) {
  return strictEqual(a, b) || bothObjects(a, b) && equalProps(a, b);
};

var bothObjects = function bothObjects(a, b) {
  return typeof a === 'object' && a !== null && typeof b === 'object' && b !== null;
};

var equalProps = function equalProps(a, b) {
  var keysOfA = Object.keys(a);
  var keysOfB = Object.keys(b);
  if (keysOfA.length !== keysOfB.length) return false;

  for (var i = 0; i < keysOfA.length; i++) {
    var key = keysOfA[i];
    if (!b.hasOwnProperty(key) || a[key] !== b[key]) return false;
  }

  return true;
};