Improve the performance of HWIDA `select` and `reject`

These are (potentially, depending on input) called in several places in
both the router, and Active Record. The code also becomes much cleaner.
This results in ~33% performance gain in both methods.

    Calculating -------------------------------------
                  before    15.696k i/100ms
                  after     19.865k i/100ms
    -------------------------------------------------
                  before    303.064k (± 2.6%) i/s -      1.523M
                  after     446.734k (± 2.4%) i/s -      2.245M

On Ruby 2.2, a warning will be emitted about states not being copied,
because we're calling `super` from a subclass. We can safely ignore it,
however, since we're converting the result back into a HWIDA

0 files changed, 0 insertions, 0 deletions