Function compare

src/directive/ngModel.js:200–216

* Returns true if specified values are equal, false otherwise. * Supports dates comparison. * * @param {*} value1 * @param {*} value2 * * @returns {boolean}

(value1, value2)

   * @returns {boolean}
   */
  function compare (value1, value2) {
    value1 = normalizeValue(value1);
    value2 = normalizeValue(value2);

    if ('object' === typeof value1 && 'object' === typeof value2) {
      if (value1 instanceof Date && value2 instanceof Date) {
        // Comparing two dates.
        return (value1.getTime() === value2.getTime());
      } else {
        // Comparing two objects.
        return angular.equals(value1, value2);
      }
    }

    // In all other cases using weak comparison.
    return (value1 == value2);
  }

  /**
   * Casting all null-like values to actual null for guaranteed comparison.