react-redux-with-path/src/utils/shallowEqual.js

A version of react-redux designed for cases that want to access sub-tree of the state. and take it as state in mapStateToProps and mapDispatchToProps

export default function shallowEqual(objA, objB) {
  if (objA === objB) {
    return true
  }

  const keysA = Object.keys(objA)
  const keysB = Object.keys(objB)

  if (keysA.length !== keysB.length) {
    return false
  }

  // Test for A's keys different from B.
  const hasOwn = Object.prototype.hasOwnProperty
  for (let i = 0; i < keysA.length; i++) {
    if (!hasOwn.call(objB, keysA[i]) ||
        objA[keysA[i]] !== objB[keysA[i]]) {
      return false
    }
  }

  return true
}