website/docs/api-reference/v1.6/node_modules/optimist/example/xup.js

#!/usr/bin/env node
var argv = require('optimist').argv;

if (argv.rif - 5 * argv.xup > 7.138) {
    console.log('Buy more riffiwobbles');
}
else {
    console.log('Sell the xupptumblers');
}