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Marcelo Fabri
24 lines
634 B
Swift
24 lines
634 B
Swift
//
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// Collection+PrefixWhile.swift
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// SwiftLint
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//
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// Created by Marcelo Fabri on 06/14/17.
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// Copyright © 2017 Realm. All rights reserved.
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//
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import Foundation
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#if swift(>=3.1)
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#else
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extension Collection {
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// from https://github.com/apple/swift/blob/4b0597a8/stdlib/public/core/Collection.swift#L1558
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func prefix(while predicate: (Iterator.Element) throws -> Bool) rethrows -> SubSequence {
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var end = startIndex
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while try end != endIndex && predicate(self[end]) {
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formIndex(after: &end)
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}
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return self[startIndex..<end]
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}
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}
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#endif
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