I'm familiar with doing pcre regexes, however they don't seem to work in swift.
^([1-9]\d{0,2}(\,\d{3})*|([1-9]\d*))(\.\d{2})?$
to validate numbers like 1,000,000.00
However, putting this in my swift function, causes an error.
extension String {
func isValidNumber() -> Bool {
let regex = NSRegularExpression(pattern: "^([1-9]\d{0,2}(\,\d{3})*|([1-9]\d*))(\.\d{2})?$", options: .CaseInsensitive, error: nil)
return regex?.firstMatchInString(self, options: nil, range: NSMakeRange(0, countElements(self))) != nil
}
}
"Invalid escape sequence in litteral"
This is of course, because pcre uses the "\" character, which swift interprets as an escape (I believe?)
So since I can't just use the regexes I'm used to. How do I translate them to be compatible with Swift code?
Within double quotes, a single backslash would be readed as an escape sequence. You need to escape all the backslashes one more time in-order to consider it as a regex backslash character.
"^([1-9]\\d{0,2}(,\\d{3})*|([1-9]\\d*))(\\.\\d{2})?$"