How do I load a text file line by line into an array with Swift?

Question

How do I load a text file line by line into an array with swift?

Answer 1

If you want to read a csv file of numeric data. (based on Cezar's answer)

func get_csv_data() -> [[Double]] {
    guard let path = NSBundle.mainBundle().pathForResource("filename_without_extension", ofType: "csv") else {
        return []
    }
    do {
        let content = try String(contentsOfFile:path, encoding: NSUTF8StringEncoding)
        let line_str_array = content.componentsSeparatedByString("\n")
        return line_str_array.map {
            let field_str_array = $0.componentsSeparatedByString(",")
            return field_str_array.map {
                Double($0)!
            }
        }
    } catch _ as NSError {
        return []
    }
}