import Foundation
let pattern = #"(?ms)^\d+\.\s*(.*?)(?=^\d+\.|\Z)"#
let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .allowCommentsAndWhitespace])
let testString = #"""
5. What ultrasound finding in a breast lesion is typically associated with malignancy?
A. Increased through transmission
B. Height greater than width
C. Hyperechogenicity
D. Surrounding hyperechoic halo
Key: B Rationale: A. Incorrect. Increased through transmission is typically associated with benign simple cysts. B. Correct. Height greater than width is a sonographic feature that is typically associated with malignancy. C. Incorrect. Hyperechogenicity typically is seen with benign fat containing lesions and is not a typical feature of malignancy. D. Incorrect. A surrounding hyperechoic (echogenic) halo is typically associated with benign post traumatic findings.
References: Stavros AT. Breast Ultrasound. Lippincott Williams and Wilkins, 2004. P. 472.
6. For which ONE of the following would a BIRADS 6 classification be MOST appropriate?
A. Post procedure mammogram for marker placement
B. Prior treated breast cancer
C. Recent biopsy proven breast cancer
D. Suspicious abnormality; needs biopsy
Key: C
Rationale: A. Incorrect. A Birads category is not given on the post procedure mammogram for marker placement. B. Incorrect. Patients with a history of breast cancer are not assigned a Birads Category 6, which is reserved for patients with known (untreated as yet) malignancy. C. Correct. Birads Category 6 is assigned to patients with a diagnosis of cancer who have not yet been definitively treated. D. Incorrect. Patients with suspicious abnormalities; need biopsy should be coded Birads Category 4. Birads 6 is reserved for patients with a known biopsy proven diagnosis of breast cancer.
References: ACR BIRADS Atlas, 5th Edition, 2013. P. 149-159.
"""#
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