all tasks

Task/Y-combinator/JavaScript/y-combinator-1.js

@@ -0,0 +1,18 @@
+function Y(f) {
+    var g = f(function() {
+        return g.apply(this, arguments);
+    });
+    return g;
+}
+
+var fac = Y(function(f) {
+    return function(n) {
+        return n > 1 ? n * f(n - 1) : 1;
+    };
+});
+
+var fib = Y(function(f) {
+    return function(n) {
+        return n > 1 ? f(n - 1) + f(n - 2) : n;
+    };
+});

Task/Y-combinator/JavaScript/y-combinator-2.js

@@ -0,0 +1,14 @@
+function Y(f) {
+    var g = f((function(h) {
+        return function() {
+            var g = f(h(h));
+            return g.apply(this, arguments);
+        }
+    })(function(h) {
+        return function() {
+            var g = f(h(h));
+            return g.apply(this, arguments);
+        }
+    }));
+    return g;
+}

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

@@ -0,0 +1,9 @@
+function Y(f) {
+    return (function(h) {
+        return h(h);
+    })(function(h) {
+        return f(function() {
+            return h(h).apply(this, arguments);
+        });
+    });
+}

Task/Y-combinator/JavaScript/y-combinator-4.js

@@ -0,0 +1,13 @@
+function pseudoY(f) {
+    return function g() {
+        return f.apply(g, 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;
+});