json based animation toy

experimental/docs/utilities.js

Index: experimental/docs/utilities.js
diff --git a/experimental/docs/utilities.js b/experimental/docs/utilities.js
new file mode 100644
index 0000000000000000000000000000000000000000..e3261c604e2b08b93b1925157c4af2f61c04c7f7
--- /dev/null
+++ b/experimental/docs/utilities.js
@@ -0,0 +1,24 @@
+function alpha(value, color) {
+    return value << 24 | (color & 0x00FFFFFF);
+}
+
+function argb(a, r, g, b) {
+    return a << 24 | r << 16 | g << 8 | b;
+}
+
+function assert(condition) {
+    if (!condition) debugger;
+}
+
+function isAlpha(code) {
+    return (code > 64 && code < 91) // upper alpha (A-Z)
+        || (code > 96 && code < 123); // lower alpha (a-z)
+}
+
+function isArray(a) {
+    return a.constructor === Array;
+}
+
+function rgb(r, g, b) {
+    return 0xFF << 24 | r << 16 | g << 8 | b;
+}