@@ -0,0 +1,19 @@
+import Foundation
+
+let testString = "one 1 two 2 three 3"
+
+let pattern = "[0-9]" // Matching numbers
+let nsString = testString as NSString // Cating to NSString to use special methods
+
+// Trying to initialize regex
+do {
+let regex = try NSRegularExpression(pattern: pattern, options: [])
+let results = regex.matches(in: testString, options: [], range: NSMakeRange(0, testString.characters.count)) // Matches
+let result = results.map { nsString.substring(with: $0.range) }
+print(result)
+} catch let error as NSError { // Handling exception
+print("Invalid regex: \(error.localizedDescription)")
+}
+
+
+

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='macos'>
+<timeline fileName='timeline.xctimeline'/>
+</playground>

@@ -0,0 +1,17 @@
+import Foundation
+
+let helloString = "Hello, World!" // Defining initial string
+
+// Initializing regular expression
+var replaceRegExp: NSRegularExpression?
+
+do {
+replaceRegExp = try NSRegularExpression(pattern: "World", options: .allowCommentsAndWhitespace)
+} catch let error as NSError { // Handling exception
+print(error.localizedDescription)
+}
+
+// Initializing new string with substring, replaced by template
+let newString = replaceRegExp?.stringByReplacingMatches(in: helloString, options: .withTransparentBounds, range: NSRange(location: 0, length: helloString.characters.count), withTemplate: "Kitten")
+
+print(newString ?? "Replacing failed", "\n")

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='macos'>
+<timeline fileName='timeline.xctimeline'/>
+</playground>

@@ -0,0 +1,19 @@
+import Foundation
+
+let initialString = "This-is-string-to-split-by-special-character" // Defining initial string
+
+let splitter = "-" // Defining splitter
+let stop = "//"
+
+// Initializing regular expression
+var splitRegExp: NSRegularExpression?
+do {
+splitRegExp = try NSRegularExpression(pattern: splitter, options: .allowCommentsAndWhitespace)
+} catch let error as NSError { // Handling exception
+print(error.localizedDescription)
+}
+
+let modifiedString = splitRegExp?.stringByReplacingMatches(in: initialString, options: .withTransparentBounds, range: NSRange(location: 0, length: initialString.characters.count), withTemplate: stop)
+
+// But in Swift this method can be used
+print(modifiedString?.components(separatedBy: stop) ?? "Splitting failed", "\n")

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='macos'>
+<timeline fileName='timeline.xctimeline'/>
+</playground>