merge、includes、set_union / intersection / difference | STL

本章覆盖：sorted input precondition；`merge`；`inplace_merge`；`includes`；`set_union`；`set_intersection`；`set_difference`；`set_symmetric_difference`；multiset-like sequence semantics；comparator；two-pointer idea；数据合并 / 权限集合 / ID 列表场景。

本章知识点

  • sorted input precondition
  • merge
  • inplace_merge
  • includes
  • set_union
  • set_intersection
  • set_difference
  • set_symmetric_difference
  • multiset-like sequence semantics
  • comparator
  • two-pointer idea
  • 数据合并 / 权限集合 / ID 列表场景