old_contents: var parse = require('../');
  var test = require('tape');
  
  test('nums', function (t) {
      var argv = parse([
          '-x', '1234',
          '-y', '5.67',
          '-z', '1e7',
          '-w', '10f',
          '--hex', '0xdeadbeef',
          '789'
      ]);
      t.deepEqual(argv, {
          x : 1234,
          y : 5.67,
          z : 1e7,
          w : '10f',
          hex : 0xdeadbeef,
          _ : [ 789 ]
      });
      t.deepEqual(typeof argv.x, 'number');
      t.deepEqual(typeof argv.y, 'number');
      t.deepEqual(typeof argv.z, 'number');
      t.deepEqual(typeof argv.w, 'string');
      t.deepEqual(typeof argv.hex, 'number');
      t.deepEqual(typeof argv._[0], 'number');
      t.end();
  });
  
new_contents: var parse = require('../');
  var test = require('tape');
  
  test('nums', function (t) {
      var argv = parse([
          '-x', '1234',
          '-y', '5.67',
          '-z', '1e7',
          '-w', '10f',
          '--hex', '0xdeadbeef',
          '789'
      ]);
      t.deepEqual(argv, {
          x : 1234,
          y : 5.67,
          z : 1e7,
          w : '10f',
          hex : 0xdeadbeef,
          _ : [ 789 ]
      });
      t.deepEqual(typeof argv.x, 'number');
      t.deepEqual(typeof argv.y, 'number');
      t.deepEqual(typeof argv.z, 'number');
      t.deepEqual(typeof argv.w, 'string');
      t.deepEqual(typeof argv.hex, 'number');
      t.deepEqual(typeof argv._[0], 'number');
      t.end();
  });
  
  test('already a number', function (t) {
      var argv = parse([ '-x', 1234, 789 ]);
      t.deepEqual(argv, { x : 1234, _ : [ 789 ] });
      t.deepEqual(typeof argv.x, 'number');
      t.deepEqual(typeof argv._[0], 'number');
      t.end();
  });
  
subject: cover the case of already numbers, at 100% coverage