I wrote extension that create split method:
extension String {
func split(splitter: String) -> Array<String> {
return self.componentsSeparatedByString(splitter)
}
}
So in playground I can write:
var str = "Hello, playground"
if str.split(",").count > 1{
var out = str.split(",")[0]
println("output: \(out)") // output: Hello
}
What do I need to make it work with regex like in Java:
str.split("[ ]+")
Because this way it doesn't work.
Thanks,
First, your split function has some redundancy. It is enough to return
return self.componentsSeparatedByString(splitter)
Second, to work with a regular expression you just have to create a NSRegularExpression and then perhaps replace all occurrences with your own "stop string" and finally separate using that. E.g.
extension String {
func split(regex pattern: String) -> [String] {
let template = "-|*~~*~~*|-" /// Any string that isn't contained in the original string (self).
let regex = try? NSRegularExpression(pattern: pattern)
let modifiedString = regex?.stringByReplacingMatches(
in: self,
range: NSRange(
location: 0,
length: count
),
withTemplate: template /// Replace with the template/stop string.
)
/// Split by the replaced string.
return modifiedString?.components(separatedBy: template) ?? []
}
}
NSNotFound.