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34 lines
1.2 KiB
Swift
34 lines
1.2 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2024 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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/// Calculates the cartesian product of `lhs` and `rhs`
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///
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/// Creates an array of tuple pairs, known as "Cartesian Product", which contains all the possible ways of
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/// pairing each element from `lhs` with each element in `rhs`.
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///
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/// Example Usage:
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/// ```swift
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/// let alphaNumberPairs = cartesianProduct([1, 2, 3], ["a", "b", "c"])
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/// print(alphaNumberPairs)
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/// // Prints: "[(1, "a"), (2, "a"), (3, "a"), (1, "b"), (2, "b"), (3, "b"), (1, "c"), (2, "c"), (3, "c")]"
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/// ```
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package func cartesianProduct<T, U>(_ lhs: [T], _ rhs: [U]) -> [(T, U)] {
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var result: [(T, U)] = []
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for lhsElement in lhs {
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for rhsElement in rhs {
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result.append((lhsElement, rhsElement))
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}
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}
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return result
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}
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