Array.prototype = new Parser()

function() { return this.list.shift() }

function Parser() {
  this.get_info_colors = function() {
    return {
      'id': self.shift(),
      'name': self.shift(),
      'colors': self.get_colors()
    }
  }
  this.get_info_grad = function() {
    return {
      'id': self.shift(),
      'name': (self.shift() + '_grad'),
      'grad': self.shift()
    }
  }
  this.get_colors = function() {
    this.shift();
    var result = [],
        element;
    while(element != ']') {
      element = this.shift();
      result.push();
    }
    return element;
  }
  this.builder = function(factory) {
    this.shift();
    var result = [],
        element;
    while(element != ']') {
      result.push(factory());
    }
    return result;
  }
  this.color_builder = function() {
    return this.builder(this.get_info_colors);
  }
  this.grad_builder = function() {
    return this.builder(this.get_info_grad);
  }
}

function CustomArray() {}
CustomArray.prototype = Object.create(Array.prototype);
CustomArray.constructor = CustomArray;

CustomArray.prototype.newMethod = function() {...}

Parser.prototype = [];

function Parser() { this.__a = 1; }
Parser.prototype = [];
var a = new Parser;
a.length
// gives 0
a.push( 2 );
// gives 1
a.length
// gives 1
a.__a
// gives 1

function Parser() {
  var args = [].slice.call( arguments );
  args.unshift( 0 );
  args.unshift( 0 );
  [].splice.apply( this, args );
}

Parser.prototype = [];

var c = new Parser( 1, 2, 3 )
c.length
// gives 3