regex.swift

public let findCamelCaseStringsRegex = "([A-Z0-9]+(?=$|[A-Z][a-z0-9])|[A-Z]?[a-z0-9]+)"

public func find(string:String, regex:String) -> [String] {
    var r:[String] = []
    var sr = string.startIndex..<string.endIndex
    let opt = NSStringCompareOptions.RegularExpressionSearch
    while !sr.isEmpty {
        if let match = string.rangeOfString(regex, options:opt, range:sr) {
            r.append(string[match])
            sr.startIndex = advance(sr.startIndex, distance(match.startIndex,match.endIndex))
        }
    }
    return r
}