import Foundation
let pattern = #"^(.*)(\/comments\/)(.*)"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = #"""
https://www.reddit.com/r/RationalPsychonaut/comments/5m4rhv/a_satirical_blog_about_enlightenment_in_everyday/
https://www.reddit.com/r/swift/comments/5mriaj/i_just_released_a_swift_wrapper_for_the_llvm_api/
"""#
let stringRange = NSRange(location: 0, length: testString.utf16.count)
let substitutionString = #"$1$2"#
let result = regex.stringByReplacingMatches(in: testString, range: stringRange, withTemplate: substitutionString)
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