Update and add examples

examples/list.ang

@@ -0,0 +1,51 @@
+
+# Empty list
+write([])
+
+# List with items
+write([3, 1, 4, 1, 5, 9, 2, 6, 5])
+
+# List with items of different types
+write(["", "私はかっこいいです。", true, nil, nil, 1, 2])
+
+a := []
+
+a = a.append(1)
+a = a.append(2)
+
+write(a)
+
+
+list := []
+
+n := 0
+x := 0
+while n < 100 {
+    x = x + 2*n + 1
+
+    list = list.append(x)
+    n = n + 1
+}
+
+write(list)
+write(list.map(func(a) {
+    return a - 1
+}))
+write(list.length())
+write(list.at(69))
+
+other := []
+
+a := 1
+while a <= 10 {
+    other = other.append(a)
+    a = a + 1
+}
+
+sum := other.reduce(func(tot, x) {
+    return tot + x
+}, 0)
+
+write(sum)
+
+assert(sum == a*(a-1)/2)