iOS-String-Extensions.swift

extension String{
    
    var length : Int {
        return self.count
    }
    
    func replace(target: String, withString: String) -> String {
        return self.replacingOccurrences(of: target, with: withString)
    }
    
    func trimmed() -> String {
        return self.trimmingCharacters(in: .whitespacesAndNewlines)
    }
    
    func fromBase64() -> String? {
        guard let data = Data(base64Encoded: self) else {
            return nil
        }
        return String(data: data, encoding: .utf8)
    }
    
    func toBase64() -> String {
        return Data(self.utf8).base64EncodedString()
    }
    
    func capitalizingFirstLetter() -> String {
        let first = String(self.prefix(1)).capitalized
        let other = String(self.dropFirst())
        return first + other
    }
    
    var toDouble: Double {
        return (self as NSString).doubleValue
    }
    
}