import Foundation
let pattern = #"\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"#
let regex = try! NSRegularExpression(pattern: pattern)
let testString = #"""
Please contact us at: support@github.com.
Just send email to s.miller@mit.edu and j.hopking@york.ac.uk for more information.
Many users @ SoftUni confuse email addresses. We @ Softuni.BG provide
high-quality training @ home or @ class. –- steve.parker@soft.de.
• Examples of valid emails: info@company-hotels.org, kiki@hotmail.co.uk, no-reply@github.com, s.peterson@mail.uu.net, info-bg@software-software.software.academy.
• Examples of invalid emails: --123@gmail.com, …@mail.bg, .info@info.info, _steve@yahoo.cn, mike@helloworld, mike@.unknown.soft., s.johnson@invalid-.
\b(\b[\w.\w]+\b)@(\b[\w.\w]+\b)\b
\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
"""#
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