import Foundation
let pattern = #"\\\\text\s*\{[^{}]*}"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = #"""
\\text { c. } 50 \\times 14
\\left. \\begin{array} { l l } { \\text { b) } 2 \\frac { 1 } { 5 } \\div ( \\frac { 4 } { 5 } - \\frac { 1 } { 4 } ) } & { } \\\\ { \\text { b) } \\frac { 1 } { 4 } - \\frac { 3 } { 4 } ) } & { } \\end{array} \\right.
"""#
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