import Foundation
let pattern = #"^(?:remind me ).*? (to|that|about|its|it's)? ?(.*)$"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = #"""
remind me in 24 hours test
remind me in 24 hours to test
remind me to test
E.g. These strings would work with your current pattern
two spaces after 'remind me' where the group fits in:
^(?:remind me ).*? (to....
^ ^
remind me to test
remind me blabla to test
one or three or more, no:
remind me to test
remind me to test
remind me bla bla to test
"""#
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