diff --git a/examples/hello-world.007 b/examples/hello-world.007
deleted file mode 100644
index dd3046db..00000000
--- a/examples/hello-world.007
+++ /dev/null
@@ -1 +0,0 @@
-say("Hello, world!");
diff --git a/examples/x-and-xx.007 b/examples/x-and-xx.007
new file mode 100644
index 00000000..d67c2f65
--- /dev/null
+++ b/examples/x-and-xx.007
@@ -0,0 +1,39 @@
+macro infix:<xx>(left, right) is equal(infix:<*>) {
+    # Flattens one layer.
+    sub flatten (inputList) {
+        my result = [];
+        for inputList -> i {
+            if (type(i) == type([])) {
+                for i -> j {
+                    result.push(j);
+                }
+            } else {
+                result.push(i);
+            }
+        }
+        return result;
+    }
+    return quasi {
+        flatten((^{{{right}}}).map(sub getValue(ignore) {
+            return {{{left}}};
+        }))
+    }
+}
+
+sub infix:<x>(left, right) is equal(infix:<*>) {
+    return (left xx right).join("");
+}
+
+# Test string x number.
+say("testing" x 2);
+
+# Test number xx number.
+my i = 0;
+say((i = i + 1) xx 3);
+
+# Test list xx number.
+say([1, 2, 3] xx 2);
+
+# Test (list or number) xx number.
+my j = 0;
+say((j = [1, [1, 2, 3]][j && 1]) xx 2);
diff --git a/t/examples/hello-world.t b/t/examples/hello-world.t
deleted file mode 100644
index 135d3c8a..00000000
--- a/t/examples/hello-world.t
+++ /dev/null
@@ -1,9 +0,0 @@
-use Test;
-use _007::Test;
-
-my @lines = run-and-collect-output("examples/hello-world.007");
-
-is +@lines, 1, "one line of output";
-is @lines[0], "Hello, world!", "correct output";
-
-done-testing;
diff --git a/t/examples/x-and-xx.t b/t/examples/x-and-xx.t
new file mode 100644
index 00000000..2cff2125
--- /dev/null
+++ b/t/examples/x-and-xx.t
@@ -0,0 +1,13 @@
+use Test;
+use _007::Test;
+
+my @lines = run-and-collect-output("examples/x-and-xx.007");
+
+is +@lines, 4, "correct number of lines";
+
+is @lines[0], "testingtesting", "first line";
+is @lines[1], "[1, 2, 3]", "second line";
+is @lines[2], "[1, 2, 3, 1, 2, 3]", "third line";
+is @lines[3], "[1, 1, 2, 3]", "fourth line";
+
+done-testing;
diff --git a/tutorial/README.md b/tutorial/README.md
index a34d626b..c8358e7c 100644
--- a/tutorial/README.md
+++ b/tutorial/README.md
@@ -186,15 +186,12 @@ this, the assignment in the `constant` declaration is mandatory.
 
 ## Setting
 
-There's a scope outside the program scope, containing a utility
+There's a scope outside the program scope, containing a few utility
 subroutines. These should be fairly self-explanatory.
 
     say(any)
+    prompt(any)
     type(any)
-    str(any)
-    int(any)
-    min(a, b)
-    max(a, b)
 
 ## Objects
 
@@ -233,19 +230,30 @@ The following built-in types have methods associated with them:
     .trim()
     .split(sep)
     .index(substr)
-    .charat(pos)
+    .contains(substr)
     .substr(pos, chars)
     .prefix(pos)
     .suffix(pos)
+    .charat(pos)
 
 ### `Array`
 
     .size()
     .reverse()
     .sort()
+    .shuffle()
+    .concat(array)
     .join(sep)
     .map(fn)
     .filter(fn)
+    .push(newelem)
+    .pop()
+    .shift()
+    .unshift(newelem)
+
+### `Object`
+
+    .size()
 
 ## Q objects