ソースコードのキャプチャ付きツイートテスト #CodePiece

CodePiece.swift

    private func buildQueryString(fromDictionary parameters: [String: String]) -> String {

        var urlVars = [String]()
        for (key, var val) in parameters {
            val = val.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLQueryAllowedCharacterSet())!
            urlVars += [key + "=" + "\(val)"]
        }
        return (!urlVars.isEmpty ? "?" : "") + join("&", urlVars)
    }