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var spawn = require('child_process').spawn;
var cmd  = spawn('ruby', ['testRuby.rb']);
var counter = 0;
cmd.stdout.on('data', function(data) {
    counter ++;
  console.log('stdout: ' + data);
});

cmd.stderr.on('data', function(data) {
  console.log('stderr: ' + data);
});

cmd.on('exit', function(code) {
  console.log('exit code: ' + code);
  console.log(counter);
});