import Foundation
let pattern = #"202[0-9]-(1[0-2]|0[1-9])-(0[1-9]|[1-2][0-9]|3[0-1])_([0-1][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9]"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = #"""
2020-11-09_15:36:38
2020-12-29_15:36:38
2029-09-09_15:36:38
2020-11-31_15:36:38
2020-11-31_00:00:00
2020-11-31_23:59:59
"""#
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