Bonus Marks

• › Rewrite the len function using foldl.
• › Rewrite the elem function using foldl.
• › Incorporate your standard library directly into the language. Make it load at start-up.
• › Write some documentation for your standard library, explaining what each of the functions do.
• › Write some example programs using your standard library, for users to learn from.
• › Write some test cases for each of the functions in your standard library.