+=head3 last (list)
+
+For example:
+
+ last (["a", "b", "c"]) ⇒ "c"
+
+Returns the last element of a list.
+
+=head3 nth (n, list)
+
+For example:
+
+ nth (1, ["a", "b", "c"]) ⇒ "b"
+
+Returns the n’th element of a list (counting from 0).
+
+=head3 read (filename)
+
+For example:
+
+ read ("filename") => "this is the content of filename"
+
+Read the contents of C<filename> and return it as a single string.
+If there is a trailing C<\n> in the file it is truncated.
+
+=head3 readlines (filename)
+
+For example:
+
+ readlines ("filename") => ["line1", "line2", "line3"]
+
+Read the lines in C<filename> returning a list of strings.
+
+=head3 realpath (filename)
+
+For example:
+
+ realpath ("./tests") ⇒ "/home/user/tests"
+
+Run the L<realpath(1)> command to return the resolved absolute path of
+the C<filename> parameter.
+