import Foundation
let pattern = #"\b\d+\s+[A-Z]{3}\s+[A-Z0-9]+"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = #"""
1 -1 2 SER HA H 4.477 0.003 1
2 -1 2 SER HB2 H 3.765 0.001 1
3 -1 2 SER HB3 H 3.765 0.001 1
4 -1 2 SER C C 173.726 0.2 1
5 -1 2 SER CA C 58.16 0.047 1
6 -1 2 SER CB C 64.056 0.046 1
7 0 3 HIS H H 8.357 0.004 1
8 0 3 HIS HA H 4.725 0.003 1
9 0 3 HIS HB2 H 3.203 0.003 2
.....
63 7 10 GLU HA H 4.328 0.004 1
64 7 10 GLU HB2 H 2.154 0.005 2
65 7 10 GLU HB3 H 2.156 0.004 2
66 7 10 GLU HG2 H 2.262 0.014 2
67 7 10 GLU HG3 H 2.464 0.001 2
68 7 10 GLU C C 177.242 0.2 1
69 7 10 GLU CA C 59.009 0.068 1
"""#
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