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Kazuhiro Hayashi
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Feb 23, 2017
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| // | ||
| // EditDistance.swift | ||
| // EditDistance | ||
| // | ||
| // Created by Kazuhiro Hayashi on 2/19/17. | ||
| // Copyright © 2017 Kazuhiro Hayashi. All rights reserved. | ||
| // | ||
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| import Foundation | ||
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| public class EditDistance<T: Comparable> { | ||
| private let _from: [[T]] | ||
| private let _to: [[T]] | ||
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| public init(from: [[T]], to: [[T]]) { | ||
| _from = from | ||
| _to = to | ||
| } | ||
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| public init(from: [T], to: [T]) { | ||
| _from = [from] | ||
| _to = [to] | ||
| } | ||
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| public func calculate<Algorithm: EditDistanceAlgorithm>(with algorithm: Algorithm) -> [EditScript<T>] where Algorithm.Element == T { | ||
| return algorithm.calculate(from: _from, to: _to) | ||
| } | ||
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| public func calculate() -> [EditScript<T>] { | ||
| return Wu().calculate(from: _from, to: _to) | ||
| } | ||
| } | ||
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| public class EditDistanceProxy<T: Comparable> { | ||
| private let _generator: ([T]) -> EditDistance<T> | ||
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| public init(_ from: [T]) { | ||
| _generator = { (to: [T]) -> EditDistance<T> in | ||
| return EditDistance(from: from, to: to) | ||
| } | ||
| } | ||
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| public func compare<Algorithm: EditDistanceAlgorithm>(to ary: [T], algorithm: Algorithm) -> [EditScript<T>] where Algorithm.Element == T { | ||
| return _generator(ary).calculate(with: algorithm) | ||
| } | ||
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| public func compare(to ary: [T]) -> [EditScript<T>] { | ||
| return _generator(ary).calculate(with: Wu()) | ||
| } | ||
| } | ||
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| public extension Array where Element: Comparable { | ||
| public var diff: EditDistanceProxy<Element> { | ||
| return EditDistanceProxy(self) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| // | ||
| // EditDistanceProtocol.swift | ||
| // EditDistance | ||
| // | ||
| // Created by Kazuhiro Hayashi on 2/18/17. | ||
| // Copyright © 2017 Kazuhiro Hayashi. All rights reserved. | ||
| // | ||
|
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| import Foundation | ||
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| public protocol EditDistanceAlgorithm { | ||
| associatedtype Element: Comparable | ||
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| func calculate(from: [[Element]], to: [[Element]]) -> [EditScript<Element>] | ||
| } | ||
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| public class AnyEditDistance<T>: EditDistanceAlgorithm where T: Comparable { | ||
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| public func calculate(from: [[T]], to: [[T]]) -> [EditScript<T>] { | ||
| return _calc(from, to) | ||
| } | ||
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| public typealias Element = T | ||
| public var _calc: ([[T]], [[T]]) -> [EditScript<T>] | ||
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| init(_ calc: @escaping ([[T]], [[T]]) -> [EditScript<T>]) { | ||
| _calc = calc | ||
| } | ||
| } |
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