1. 属性
  2. isTruthy
  3. 方法
  4. add
  5. divide
  6. equals
  7. exponentiate
  8. greaterThan
  9. greaterThanOrEqualTo
  10. lessThan
  11. lessThanOrEqualTo
  12. modulo
  13. multiply
  14. notEquals
  15. strictEquals
  16. strictNotEquals
  17. subtract
  18. unsignedRightShift