An argument cannot take negative number as it's value

[redspade]

Negative numbers are treated as individual arguments, not values :
e.g. -minThreshold -3 is translated into two arguments (--min, --3), instead of min argument with 3 as its value.

If this is not an intended behavior, I think negative number should be treated differently.

In order to support multiple numbers as a value, e.g. --select -7,3,-2,5, I think something like following will do:

       if(arg == noDashes || arg.matches("-\\d+.*") )
          (acc.head._1 -> (arg :: acc.head._2)) :: acc.tail

[azymnis]

Good catch. Here's the pull request with the fix:

#195