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26 lines
1.2 KiB
Swift
26 lines
1.2 KiB
Swift
/******************************************************************************
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Copyright (C) 2024 by Patrick Heyer <PatTheMav@users.noreply.github.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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******************************************************************************/
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extension Sequence where Iterator.Element: Hashable {
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/// Filters a `Sequence` to only contain its unique elements, retaining order for unique elements.
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/// - Returns: Filtered `Sequence` with unique elements of original `Sequence`
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func unique() -> [Iterator.Element] {
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var seen: Set<Iterator.Element> = []
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return filter { seen.insert($0).inserted }
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}
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}
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