Basic language learnings

• Infinity
• Binary digits
• Apply a callback to an array
• Variadic function
• Variables
• Return multiple values
• Random numbers
• Pick random element
• Generic swap
• Filter
• Classes
• Boolean values
• Collections
• Associative array/Iteration
• Associative array/Creation
• Arrays
• Empty program
• Copy a string
• Inheritance/Single
• Comments
• Call an object method
• Arithmetic/Integer
• Factors of an integer
• Strip comments from a string
• Compound data type
• Function definition
• Formatted numeric output
• String prepend
• String append
• String concatenation
• String length
• Literals/Floating point
• Literals/Integer
• Literals/String
• Count in octal
• Assertions
• Create a two-dimensional array at runtime
• Program name
• Hello world/Text
• Hello world/Standard error
• Hello world/Newline omission
• Optional parameters
• Define a primitive data type
• Parametric polymorphism
• Sleep
• Scope modifiers
• Hash from two arrays
• Special characters
• Scope/Function names and labels
• Character codes
• Interactive programming
• Substring
• Enumerations
• Abstract type
• Polymorphism
• Memory allocation
• Named parameters
• Special variables
• Null object
• String interpolation (included)
• Inheritance/Multiple
• Program termination
• Real constants and functions
• List comprehensions