Raven

Raven is an eclectic language with features derived from derived from::Python, derived from::Forth, and derived from::Perl. It was developed independently by Sean Pringle. Raven is available from aerosuidae.net under the GNU General Public License. It is currently only available for the runs on::Linux platform.

Features

Its described feature set includes:

From Python

• Whitespace indentation to define code blocks.
• Some common function names.

From Forth

• Postfix Notation and the Data Stack.
• Dictionary of short atomic functions.

From Perl

• Lists and Hash tables.
• Regular Expressions.

Other design goals

• Use clear and concise syntax.
• Be fast to write and fast to run.
• Use closures as a simple object model.
• Have minimal restrictions on variable and function names.
• Rely on best practices guidelines rather than imposing rules for everything.
• Interface to MySQL and SQLite.
• Support multithreading.

Source: The Raven home page

Other Resources

• Raven Manual

Tasks

• Apply a callback to an array
• Arithmetic-geometric mean
• Arithmetic/Integer
• Associative array/Creation
• Boolean values
• Check that file exists
• Classes
• Collections
• Command-line arguments
• Comments
• Concurrent computing
• Copy a string
• Create a file
• Date format
• Delete a file
• Empty program
• Enumerations
• Exceptions
• Execute a system command
• FizzBuzz
• Formatted numeric output
• Function definition
• Greatest common divisor
• Greatest element of a list
• Greatest subsequential sum
• Hamming numbers
• Hash from two arrays
• Haversine formula
• Hello world!
• Hello world/Text
• Here document
• Higher-order functions
• Integer comparison
• Integer sequence
• Introspection
• Leap year
• Letter frequency
• Loops/For with a specified step
• Metered concurrency
• Null object
• Price fraction
• Program name
• Random numbers
• Range expansion
• Read entire file
• Regular expressions
• Remove duplicate elements
• Rename a file
• Return multiple values
• Reverse a string
• Rot-13
• SQL-based authentication
• Sort an integer array
• Stack
• Stack traces
• String case
• String concatenation
• Substring
• Substring/Top and tail
• Sum and product of an array
• Sum of a series
• Sum of squares
• Synchronous concurrency
• System time
• Time a function
• Tokenize a string
• Walk a directory/Non-recursively
• Write float arrays to a text file