Add implicit helpers for numeric arguments

[wbertelsen]

Similar to RangedArgs this captures logic for handling numeric arguments. I could also imagine this logic living on Args itself.

[johnynek]

1. I'm not sure you are getting any mileage out of this. Couldn't you just inline the parsing in the methods below? You don't expose a generic way to use this.
2. NumberFormatException is too specific here. I would have gone with:

import scala.util.NonFatal
try f(key, value) catch {
  case NonFatal(_) => throw ArgsException(s"Invalid value ${value} for -- ${key}")
}

[johnynek]

This needs tests.

[wbertelsen]

I'll give this another pass and some tests and update.

[johnynek]

RangedArgs was old code that was originally internal to Twitter. We could
revist that as well.

On Thu, Dec 18, 2014 at 10:34 AM, Will Bertelsen notifications@github.com
wrote:

I'll give this another pass and some tests and update.

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#1138 (comment).

Oscar Boykin :: @posco :: http://twitter.com/posco

[johnynek]

Thanks for the contribution!