compiling chess results with node streams

chess.js

#!/usr/bin/env node

var fs = require('fs')
var path = require('path')

var dir = process.argv[2]
if (!dir) throw new Error('Usage: ./chess.js path-to-pgn-files/ ')

var white = 0
var black = 0
var ties  = 0

var rw = /Result\s"1-0"/g
var rb = /Result\s"1-0"/g
var rt = /Result\s"1\/2-1\/2"/g

var files = fs.readdirSync(dir)

var closed = 0
var total  = files.length

console.time('Processed ' + total + ' files')

files.forEach(function (file) {

  var stream = fs.createReadStream(path.join(dir, file))
  stream.setEncoding('utf8')

  stream.on('readable', function () {
    var chunk, match
    while ((chunk = stream.read()) !== null) {
      while (rw.exec(chunk)) white += 1
      while (rb.exec(chunk)) black += 1
      while (rt.exec(chunk)) ties  += 1
    }
  })

  stream.on('close', function () {
    console.log('Processed %s', file)
    if (++closed == total) {
      console.timeEnd('Processed ' + total + ' files')
      console.log("white: %d, black: %d, ties: %d", white, black, ties)
    }
  })

})

i think you got a copy & paste error at Line 14 d:-) cheers