Acme.BookStore.HttpApi.Host/node_modules/just-compare/index.js

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module.exports = compare;

/*
  primitives: value1 === value2
  functions: value1.toString == value2.toString
  arrays: if length, sequence and values of properties are identical
  objects: if length, names and values of properties are identical
  compare([[1, [2, 3]], [[1, [2, 3]]); // true
  compare([[1, [2, 3], 4], [[1, [2, 3]]); // false
  compare({a: 2, b: 3}, {a: 2, b: 3}); // true
  compare({a: 2, b: 3}, {b: 3, a: 2}); // true
  compare({a: 2, b: 3, c: 4}, {a: 2, b: 3}); // false
  compare({a: 2, b: 3}, {a: 2, b: 3, c: 4}); // false
  compare([[1, [2, {a: 4}], 4], [[1, [2, {a: 4}]]); // true
*/

function compare(value1, value2) {
  if (value1 === value2) {
    return true;
  }
  /* eslint-disable no-self-compare */
  // if both values are NaNs return true
  if ((value1 !== value1) && (value2 !== value2)) {
    return true;
  }
  if ({}.toString.call(value1) != {}.toString.call(value2)) {
    return false;
  }
  if (value1 !== Object(value1)) {
    // non equal primitives
    return false;
  }
  if (!value1) {
    return false;
  }
  if (Array.isArray(value1)) {
    return compareArrays(value1, value2);
  }
  if ({}.toString.call(value1) == '[object Object]') {
    return compareObjects(value1, value2);
  } else {
    return compareNativeSubtypes(value1, value2);
  }
}

function compareNativeSubtypes(value1, value2) {
  // e.g. Function, RegExp, Date
  return value1.toString() === value2.toString();
}

function compareArrays(value1, value2) {
  var len = value1.length;
  if (len != value2.length) {
    return false;
  }
  var alike = true;
  for (var i = 0; i < len; i++) {
    if (!compare(value1[i], value2[i])) {
      alike = false;
      break;