text: var fs = require('fs');
  var concat = require('./external.js').concatArray;
  
  var test = 10;
  var second = 'test';
  
  for (var i = 0; i <= test; i++) {
     debugger;
     second+=i;
  }
  
  setTimeout(function() {
     debugger;
     test = 1000;
     console.log(second);
  }, 1000);
  
  fs.readFile('./log.txt', 'utf8', function (err,data) {
     if (err) {
        return console.log(err);
     }
  
     var arry = ['apple','orange','strawberry'];
     var arry2 = concat(data,arry);
     console.log(arry2);
  });
  