Несколько контекстов

  randomer = function(stacks, length) {
    var i, mas, n, result, _i, _j;
    result = [];
    for (i = _i = 0; 0 <= stacks ? _i <= stacks : _i >= stacks; i = 0 <= stacks ? ++_i : --_i) {
      mas = result[i] = [];
      for (n = _j = 0; 0 <= length ? _j <= length : _j >= length; n = 0 <= length ? ++_j : --_j) {
        randomer._a(mas, n, length);
      }
    }
    return console.log(result);
  };
  randomer._a = function(mas, index, length) {
    var random;
    random = ~~(Math.random() * length);
    if (!mas[random]) {
      return mas[random] = index;
    } else {
      return randomer._a(mas, index, length);
    }
  };

param = {
  stacks: 2,
  length: 6,
  randomer: function() {
    var i, n, result, _i, _j;
    result = [];
    for (i = _i = 0; 0 <= (this.stacks ? _i <= this.stacks : _i >= this.stacks; i = 0 <= this.stacks ? ++_i : --_i) {
      this.mas = result[i] = [];
      for (n = _j = 0; 0 <= this.length ? _j <= this.length : _j >= this.length; n = 0 <= this.length ? ++_j : --_j) {
        this.randomer._a();
      }
    }
    return result;
  };
}
param.randomer._a = function() {
    var random;
    random = ~~(Math.random() * this.length);
    if (!this.mas[random]) {
      return this.mas[random] = this.index;
    } else {
      return randomer._a();
    }
};
 
randomer(param)

function main( a, b ) {
    main.go( )
}
 
main.go = function ( ) {
  console.log( this.arguments[0], this.arguments[1] )
}
 
main( "a", "b" )