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refs #698 Added unorderedEqualsByKeys method for sequences.

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Mathew Sutcliffe
2016-07-04 18:12:16 +01:00
parent 8a46a11dd8
commit a209f961a6
1 changed files with 10 additions and 0 deletions
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10
src/blackmisc/sequence.h
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@@ -463,6 +463,16 @@ namespace BlackMisc
return partiallySorted(n, BlackMisc::Predicates::MemberLess(key1, keys...)); return partiallySorted(n, BlackMisc::Predicates::MemberLess(key1, keys...));
} }
//! Return true if this container equals another container, considering only the given element members.
//! Order of elements is not considered; this is implemented using a transient sort, so don't overuse.
template <class U, class Key0, class... Keys>
bool unorderedEqualsByKeys(const U &other, Key0 k0, Keys... keys) const
{
if (equalPointers(this, &other)) { return true; }
if (size() != other.size()) { return false; }
return sorted(k0, keys...).equalsByKeys(other.sorted(k0, keys...));
}
//! Split up the sequence into subsequences for which the given predicate returns the same value. //! Split up the sequence into subsequences for which the given predicate returns the same value.
template <class Predicate> template <class Predicate>
auto separate(Predicate p) const -> QMap<decltype(p(std::declval<T>())), CSequence> auto separate(Predicate p) const -> QMap<decltype(p(std::declval<T>())), CSequence>