Initial data commit

Task/Call-a-function/JavaScript/call-a-function-1.js

@@ -0,0 +1,3 @@
+var foo = function() { return arguments.length };
+foo() // 0
+foo(1, 2, 3) // 3

Task/Call-a-function/JavaScript/call-a-function-2.js

@@ -0,0 +1 @@
+var squares = [1, 2, 3].map(function (n) { return n * n }); // [1, 4, 9]

Task/Call-a-function/JavaScript/call-a-function-3.js

@@ -0,0 +1,5 @@
+var make_adder = function(m) {
+    return function(n) { return m + n }
+};
+var add42 = make_adder(42);
+add42(10) // 52

Task/Call-a-function/JavaScript/call-a-function-4.js

@@ -0,0 +1,4 @@
+foo.toString()
+"function () { return arguments.length }"
+alert.toString()
+"function alert() { [native code] }"

Task/Call-a-function/JavaScript/call-a-function-5.js

@@ -0,0 +1,6 @@
+var mutate = function(victim) {
+    victim[0] = null;
+    victim = 42;
+};
+var foo = [1, 2, 3];
+mutate(foo) // foo is now [null, 2, 3], not 42