Initial data commit

Task/Higher-order-functions/JavaScript/higher-order-functions-1.js

@@ -0,0 +1,10 @@
+function first (func) {
+  return func();
+}
+
+function second () {
+  return "second";
+}
+
+var result = first(second);
+result = first(function () { return "third"; });

Task/Higher-order-functions/JavaScript/higher-order-functions-2.js

@@ -0,0 +1,27 @@
+>>> var array = [2, 4, 5, 13, 18, 24, 34, 97];
+>>> array
+[2, 4, 5, 13, 18, 24, 34, 97]
+
+// return all elements less than 10
+>>> array.filter(function (x) { return x < 10 });
+[2, 4, 5]
+
+// return all elements less than 30
+>>> array.filter(function (x) { return x < 30 });
+[2, 4, 5, 13, 18, 24]
+
+// return all elements less than 100
+>>> array.filter(function (x) { return x < 100 });
+[2, 4, 5, 13, 18, 24, 34, 97]
+
+// multiply each element by 2 and return the new array
+>>> array.map(function (x) { return x * 2 });
+[4, 8, 10, 26, 36, 48, 68, 194]
+
+// sort the array from smallest to largest
+>>> array.sort(function (a, b) { return a > b });
+[2, 4, 5, 13, 18, 24, 34, 97]
+
+// sort the array from largest to smallest
+>>> array.sort(function (a, b) { return a < b });
+[97, 34, 24, 18, 13, 5, 4, 2]