mcmath

/**
 * Tests whether two values are deeply equal using same-value equality.
 *
 * Two values are considered deeply equal iff 1) they are the same value,
 * 2) they are both arrays whose length and elements are deeply equal, or 3) they are both
 * non-callable, non-array objects whose own, enumerable, string-keyed
 * properties are deeply equal.
 *
 * Caution: This function does not fully support circular references. Use this
 * function only if you are sure that at least one of the arguments has no