Swift Language NSRegularExpression in Swift Special Characters
Example
To match special characters Double Backslash should be used
\. becomes \\.
Characters you'll have to escape include
(){}[]/\+*$>.|^?
The below example get three kinds of opening brackets
let specials = "(){}[]"
let pattern = "(\\(|\\{|\\[)"
do {
let regEx = try NSRegularExpression(pattern: pattern, options: [])
let nsString = specials as NSString
let matches = regEx.matches(in: specials, options: [], range: NSMakeRange(0, nsString.length))
let output = matches.map {nsString.substring(with: $0.range)}
} catch let error as NSError {
print("Matching failed")
}
//output = ["(", "{", "["]
