mirror of
https://github.com/Instagram/IGListKit
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f92b9339ee
Summary: The standardized Meta copyright notice is "Copyright (c) Meta Platforms, Inc. and affiliates." and not "Copyright (c) Meta Platforms, Inc. and its affiliates." (Dropping the "its") This diff updates the copyright notice in each source file to the correct this. Reviewed By: willbailey Differential Revision: D44737667 fbshipit-source-id: 643bf36df76723e70d9d826c53cf8f29b8a0c8cc
38 lines
980 B
Swift
38 lines
980 B
Swift
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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import Foundation
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extension MutableCollection {
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/// Shuffles the contents of this collection.
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mutating func shuffle() {
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guard count > 1 else { return }
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for (firstUnshuffled, unshuffledCount) in zip(indices, stride(from: count, to: 1, by: -1)) {
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let distance: Int = numericCast(arc4random_uniform(numericCast(unshuffledCount)))
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guard distance != 0 else { continue }
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let shuffleIndex = index(firstUnshuffled, offsetBy: distance)
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self.swapAt(firstUnshuffled, shuffleIndex)
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}
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}
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}
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extension Sequence {
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/// Returns an array with the contents of this sequence, shuffled.
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var shuffled: [Iterator.Element] {
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var result = Array(self)
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result.shuffle()
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return result
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}
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}
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