function Solve(args) {

  var secretNumber = parseInt(args[0]),

      bulls = parseInt(args[1]),

      cows = parseInt(args[2]);

  var result = "",

      bullsCount = 0,

      cowsCount = 0,

      matchNumbers = [],

      secretChars = args[0].toString().split('');

  /* 

  var getBulls = function (secretNum, guessNum) {

    var guessChars = guessNum.toString().split('');

    var bullsCount = 0;

​

    for(var i = 0; i < 4; i++) {

      if (secretChars[i] == guessChars[i]) {

        bullsCount++;

      }

    }

    return bullsCount;

  };

  var getCows = function (secretNum, guessNum) {

    var guessChars = guessNum.toString().split('');

    var cowsCount = 0;

​

    for(var i = 0; i < 4; i++) {

      if (secretChars.indexOf(guessChars[i]) != -1) {

        cowsCount++;

      }

    }

    return cowsCount;

  };

  */

  // Check all possible 4-digit numbers

  for (var guessNumber = 1000; guessNumber <= 9999; guessNumber++) {

    var guessChars = guessNumber.toString().split('');

    for(var b = 0; b < 4; b++) {

      if (secretChars[b] == guessChars[b]) {

        bullsCount++;

      }

    }

    for(var c = 0; c < 4; c++) {

      if (secretChars.indexOf(guessChars[c]) != -1) {

        cowsCount++;

      }

    }

    // Check 

    if (bulls == bullsCount && cows == cowsCount) {

      result += guessNumber + " ";

    }

  }

  if (result == "") {

    result += "No";

  }

  return result;

}

​

console.log(Solve([1234, 1, 0]));

​

​

​

​

​

​