Joy

'''Joy''' is a functional programming language based on combinators rather than lambda expressions. This gives it a postfix syntax, similar to Forth, although the semantics are quite different.

Tasks

• A+B
• Ackermann function
• Apply a callback to an array
• Binary digits
• Character codes
• Comments
• Copy a string
• Date format
• Empty program
• Environment variables
• Execute a system command
• Factorial
• Fibonacci sequence
• FizzBuzz
• Flatten a list
• Function composition
• Function definition
• Generic swap
• Greatest common divisor
• Hello world!
• Hello world/Text
• Higher-order functions
• Integer comparison
• Integer sequence
• Jensen's Device
• Knuth shuffle
• Loops/Infinite
• Loops/While
• Matrix transposition
• Number names
• Order two numerical lists
• Primality by trial division
• Quine
• Rename a file
• Sorting algorithms/Quicksort
• Variables
• Write float arrays to a text file
• XML/Output
• Y combinator
• Zig-zag matrix