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refs #484 CSequence: added partiallySort family of methods.

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This commit is contained in:
Mathew Sutcliffe
2015-10-05 18:30:40 +01:00
parent bc9ff9f6b2
commit eb45d7a409
1 changed files with 40 additions and 0 deletions
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40
src/blackmisc/sequence.h
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@@ -518,6 +518,46 @@ namespace BlackMisc
return sorted(BlackMisc::Predicates::MemberLess(key1, keys...));
}
/*!
* \brief In-place move the smallest n elements to the beginning and sort them.
*/
template <class Predicate> void partiallySort(size_type n, Predicate p)
{
std::partial_sort(begin(), begin() + n, end(), p);
}
/*!
* \brief In-place partially sort by some particular key(s).
* \param key1 A pointer to a member function of T.
* \param keys Zero or more additional pointers to member functions of T.
*/
template <class K1, class... Keys> void partiallySortBy(size_type n, K1 key1, Keys... keys)
{
partiallySort(n, BlackMisc::Predicates::MemberLess(key1, keys...));
}
/*!
* \brief Return a copy with the smallest n elements at the beginning and sorted.
*/
template <class Predicate>
CSequence partiallySorted(size_type n, Predicate p) const
{
CSequence result = *this;
result.partiallySort(n, p);
return result;
}
/*!
* \brief Return a copy partially sorted by some particular key(s).
* \param key1 A pointer to a member function of T.
* \param keys Zero or more additional pointers to member functions of T.
*/
template <class K1, class... Keys>
CSequence partiallySortedBy(size_type n, K1 key1, Keys... keys) const
{
return partiallySorted(n, BlackMisc::Predicates::MemberLess(key1, keys...));
}
//! Equals operator.
friend bool operator ==(const CSequence &a, const CSequence &b)
{