import Foundation
let pattern = #"(\b.+)(?=\1)"#
let regex = try! NSRegularExpression(pattern: pattern)
let testString = #"""
...
bedeubedeu France The Provençal name for tripe
bee balmbee balm Bergamot
beechmastbeechmast Beech nut
beech nutbeech nut A small nut from the beech tree,
genus Fagus and Nothofagus, similar in
flavour to a hazelnut but not commonly used.
A flavoursome oil can be extracted from
them. Also called beechmast
beechwheatbeechwheat Buckwheat
beefbeef The meat of the animal known as a cow
(female) or bull (male) (NOTE: The Anglo-
saxon name ‘Ox’ is still used for some of what
were once the less desirable parts e.g. oxtail,
ox liver)
beef bourguignonnebeef bourguignonne See boeuf à la
bourguignonne
...
"""#
let stringRange = NSRange(location: 0, length: testString.utf16.count)
let matches = regex.matches(in: testString, range: stringRange)
var result: [[String]] = []
for match in matches {
var groups: [String] = []
for rangeIndex in 1 ..< match.numberOfRanges {
let nsRange = match.range(at: rangeIndex)
guard !NSEqualRanges(nsRange, NSMakeRange(NSNotFound, 0)) else { continue }
let string = (testString as NSString).substring(with: nsRange)
groups.append(string)
}
if !groups.isEmpty {
result.append(groups)
}
}
print(result)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Swift 5.2, please visit: https://developer.apple.com/documentation/foundation/nsregularexpression