Just another update

Task/Y-combinator/JavaScript/y-combinator-3.js

@@ -1,9 +1,17 @@
-function Y(f) {
+function pseudoY(f) {
     return (function(h) {
         return h(h);
     })(function(h) {
-        return f(function() {
-            return h(h).apply(this, arguments);
+        return f.bind(function() {
+            return h(h).apply(null, arguments);
         });
     });
 }
+
+var fac = pseudoY(function(n) {
+    return n > 1 ? n * this(n - 1) : 1;
+});
+
+var fib = pseudoY(function(n) {
+    return n > 1 ? this(n - 1) + this(n - 2) : n;
+});