MQL5参考标准程序库通用数据集CHashSet<T>Clear AddCountContainsComparerTrimExcessCopyToClearRemoveExceptWithIntersectWithSymmetricExceptWithUnionWithIsProperSubsetOfIsProperSupersetOfIsSubsetOfIsSupersetOfOverlapsSetEquals Clear 移除集合的所有元素。 void Clear(); CopyTo Remove