move examples from public to their own examples folder

pyscriptjs/examples/mario/js/resources.js

@@ -0,0 +1,62 @@
+//simple resource loader
+(function() {
+    var resourceCache = {};
+    var loading = [];
+    var readyCallbacks = [];
+
+    // Load an image url or an array of image urls
+    function load(urlOrArr) {
+        if(urlOrArr instanceof Array) {
+            urlOrArr.forEach(function(url) {
+                _load(url);
+            });
+        }
+        else {
+            _load(urlOrArr);
+        }
+    }
+
+    function _load(url) {
+        if(resourceCache[url]) {
+            return resourceCache[url];
+        }
+        else {
+            var img = new Image();
+            img.onload = function() {
+                resourceCache[url] = img;
+
+                if(isReady()) {
+                    readyCallbacks.forEach(function(func) { func(); });
+                }
+            };
+            resourceCache[url] = false;
+            img.src = url;
+        }
+    }
+
+    function get(url) {
+        return resourceCache[url];
+    }
+
+    function isReady() {
+        var ready = true;
+        for(var k in resourceCache) {
+            if(resourceCache.hasOwnProperty(k) &&
+               !resourceCache[k]) {
+                ready = false;
+            }
+        }
+        return ready;
+    }
+
+    function onReady(func) {
+        readyCallbacks.push(func);
+    }
+
+    window.resources = {
+        load: load,
+        get: get,
+        onReady: onReady,
+        isReady: isReady
+    };
+})();