String + CharacterSet Examples

String+CharacterSetExamples.swift

extension String {
    
    func replacingOccurences(from characterSet: CharacterSet, with string: String) -> String {
        return self.components(separatedBy: characterSet).joined(separator: string)
    }
    
    func isValid(for characterSet: CharacterSet) -> Bool {
        let invalidCharacters = self.replacingOccurences(from: characterSet.inverted, with: "")
        return invalidCharacters.isEmpty
    }

}

"  Test  ".trimmingCharacters(in: CharacterSet.whitespaces) // "Test"
"123Test123".trimmingCharacters(in: CharacterSet.decimalDigits) // "Test"

"  T e s t  ".replacingOccurences(from: CharacterSet.whitespacesAndNewlines, with: "") // "Test"
"  T e s t  ".replacingOccurences(from: CharacterSet.whitespacesAndNewlines, with: "1") // "11T1e1s1t"

" Test ".isValid(for: .whitespacesAndNewlines) // false
"Test".isValid(for: .whitespaces) // true
"123".isValid(for: .decimalDigits) // false
"Yunus".isValid(for: .decimalDigits) // true

let emptyCharacterSet = CharacterSet(charactersIn: "")
"Yunus ".addingPercentEncoding(withAllowedCharacters: emptyCharacterSet) // "%59%75%6E%75%73%20"