I'm trying to create a function that validate my string if it is using this format
ABC123
First three characters should be letters and the other 3 should be numbers
I have no idea on how to start
Thanks
You can do it with a regular expression match on strings, like this:
let str = "ABC123"
let optRange = str.rangeOfString("^[A-Za-z]{3}\\d{3}$", options: .RegularExpressionSearch)
if let range = optRange {
println("Matched")
} else {
println("Not matched")
}
Regex above requires that the match occupied the whole string (the ^
and $
anchors at both ends), has three letters [A-Za-z]{3}
and three digits \\d{3}
.
You can also use it as an extension if you would like to:
extension String {
var match: Bool {
return rangeOfString("^[A-Za-z]{3}\\d{3}$", options: .RegularExpressionSearch) != nil
}
}
"ABC123".match // true