MQL5参考标准程序库通用数据集CHashSet<T>TrimExcess AddCountContainsComparerTrimExcessCopyToClearRemoveExceptWithIntersectWithSymmetricExceptWithUnionWithIsProperSubsetOfIsProperSupersetOfIsSubsetOfIsSupersetOfOverlapsSetEquals TrimExcess 设置集合容量为元素的实际数量,从而释放未使用的内存。 void TrimExcess(); Comparer CopyTo