Subj : Works in browser, not in Synchronet

Subj : Works in browser, not in Synchronet
To : All
From : Kirkman
Date : Tue Jun 02 2015 02:49 pm

I've been trying to work through a tutorial on making a javascript roguelike
game (http://www.codingcookies.com/2013/04/20/building-a-roguelike-in-javascrip
t-part-4/).

The tutorial was written for the web, but with some changes I can make bits of
it work for Synchronet.

Lately I've been running into a brick wall trying to create an array of tile
objects (see code below) using a simple loop. The code spits out an array where
the first item is the desired object, but all subsequent entries in the array
are nulls.

I tried many variations, but nothing fixed my issue. At last I developed a
stripped down bit of test code so that I could compare my results on the BBS
with a web browser.

The code worked perfcetly in the browser, spitting out an array of several
objects with no nulls.

So.... I'm guessing this is an issue with SpiderMonkey 1.8.5? Can anyone
suggest a workaround?

Here's the test code. Should note that I'm using shims/polyfills to add
Object.create() and Function.prototype.extend. Also, this code ises
console.log() to display the array in a browser, but you'd want to change that
to some other logger/debugger with Synchronet.

// Object.create polyfill
if (typeof Object.create != 'function') {
Object.create = (function() {
function Temp() {}
var hasOwn = Object.prototype.hasOwnProperty;
return function (O) {
if (typeof O != 'object') {
throw TypeError('Object prototype may only be an Object or null');
}
Temp.prototype = O;
var obj = new Temp();
Temp.prototype = null; // Let's not keep a stray reference to O...
if (arguments.length > 1) {
var Properties = Object(arguments[1]);
for (var prop in Properties) {
if (hasOwn.call(Properties, prop)) {
obj[prop] = Properties[prop];
}
}
}
return obj;
};
})();
}

// Function.prototype.extend
Function.prototype.extend = function(parent) {
this.prototype = Object.create(parent.prototype);
this.prototype.constructor = this;
return this;
}

// Game object

var Game = {
init: function() {
var testArray = [];
for (var i=0; i<10; i++) {
testArray.push( Game.Tile.nullTile );
}
console.log( testArray );
}
}

Game.Glyph = function(properties) {
properties = properties || {};
this._char = properties['character'] || ' ';
this._foreground = properties['foreground'] || 'white';
this._background = properties['background'] || 'black';
};

// Create standard getters for glyphs
Game.Glyph.prototype.getChar = function(){
return this._char;
}
Game.Glyph.prototype.getBackground = function(){
return this._background;
}
Game.Glyph.prototype.getForeground = function(){
return this._foreground;
}

Game.Tile = function(properties) {
properties = properties || {};
Game.Glyph.call(this, properties);
this._isWalkable = properties['isWalkable'] || false;
this._isDiggable = properties['isDiggable'] || false;
};
// Make tiles inherit all the functionality from glyphs
Game.Tile.extend(Game.Glyph);

// Standard getters
Game.Tile.prototype.isWalkable = function() {
return this._isWalkable;
}
Game.Tile.prototype.isDiggable = function() {
return this._isDiggable;
}

// Null tile type
Game.Tile.nullTile = new Game.Tile({});

// Initialize the game
Game.init();

////--------------------------------------------------
BiC -=- http://breakintochat.com -=- bbs wiki and blog

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� Synchronet