The "Unknown:"s below indicate that an entry is incomplete.

• either the entry exist in the language, and please tell.
• either the entry doesn't exist in the language, and please tell so. The entry will be marked as such and won't appear as missing anymore.

• Category: Object Oriented, Dynamically typed

• Various

  #= ... =#	commenting (nestable)
  #	commenting (until end of line)
  ( ... )	grouping expressions

  Unknown:

  documentation comment
  information about the current line and file
  tokens (case-sensitivity (keywords, variable identifiers...))
  tokens (what is the standard way for scrunching together multiple words)
  tokens (variable identifier regexp)
  breaking lines (useful when end-of-line and/or indentation has a special meaning)
  variable assignment or declaration
  block (grouping statements, especially when statements are not expressions)
  equality / inequality
  comparison
  comparison (returns 3 values (i.e. inferior, equal or superior))
  comparison (min / max (binary or more))
  runtime evaluation
  force garbage collection

• Functions

  Unknown:

  function call
  function call (with no parameter)
  function definition
  function return value
  function called when a function is not defined (in dynamic languages)
  runtime inspecting the caller information

• Control Flow

  Unknown:

  sequence
  if_then
  if_then_else
  multiple selection (switch)
  loop (forever loop)
  loop (while condition do something)
  loop (do something until condition)
  loop (for each value in a numeric range, 1 increment (see also the entries about ranges))
  loop (for each value in a numeric range, 1 decrement)
  loop (for each value in a numeric range, free increment)
  loop (for "a la C" (while + initialisation))
  breaking control flow (returning a value)
  breaking control flow (goto (unconditional jump))
  breaking control flow (continue / break)
  exception (throwing)
  exception (catching)

• Object Oriented & Reflexivity

  Unknown:

  method invocation
  method invocation (with no parameter)
  object creation
  object cloning
  manually call an object's destructor
  class declaration
  testing class membership
  get the type/class corresponding to an object/instance/value
  methods available
  inheritance
  has the method
  current instance
  accessing parent method

• Package, Module

  Unknown:

  package scope
  declare
  import

• Strings

  Unknown:

  character "z"
  strings (with no interpolation of variables)
  strings (with interpolation of variables)
  strings (end-of-line (without writing the real CR or LF character))
  multi-line
  convert something to a string (see also string interpolation)
  serialize (marshalling)
  unserialize (un-marshalling)
  sprintf-like
  simple print
  string equality & inequality
  string size
  string concatenation
  duplicate n times
  upper / lower case character
  uppercase / lowercase / capitalized string
  ascii to character
  character to ascii
  accessing n-th character
  extract a substring
  locate a substring
  locate a substring (starting at the end)

• Booleans

  Unknown:

  false value
  true value
  logical not
  logical or / and

• Bags and Lists

  Unknown:

  list concatenation
  list flattening
  list constructor
  list/array indexing
  adding an element at the beginning (list cons)
  adding an element at index
  adding an element at the end
  first element
  all but the first element
  last element
  get the first element and remove it
  get the last element and remove it
  for each element do something
  is an element in the list
  smallest / biggest element
  join a list of strings in a string using a glue string
  list size
  iterate with index
  remove duplicates
  sort
  reverse

• Various Data Types

  Unknown:

  tuple constructor
  computable tuple (these are a kind of immutable lists playing a special role in parameter passing) (empty tuple)
  computable tuple (these are a kind of immutable lists playing a special role in parameter passing) (1-uple)
  computable tuple (these are a kind of immutable lists playing a special role in parameter passing) (using a tuple for a function call)
  reference (pointer) (creation)
  reference (pointer) (dereference)
  optional value (null value)
  optional value (value)
  optional value (null coalescing)
  record (selector)
  dictionary (constructor)
  dictionary (access)
  dictionary (has the key ?)
  dictionary (remove by key)
  dictionary (list of keys)
  dictionary (list of values)
  dictionary (merge)
  range

• Mathematics

  Unknown:

  numbers syntax (integers)
  numbers syntax (integers in base 2, octal and hexadecimal)
  numbers syntax (floating point)
  addition / subtraction / multiplication / division
  exponentiation (power)
  negation
  random (random number)
  random (seed the pseudo random generator)
  operator priorities and associativities
  square root / e-exponential / absolute value
  trigonometry (basic)
  trigonometry (inverse)
  logarithm (base e)
  logarithm (base 10)
  modulo
  truncate / round / floor / ceil
  bitwise operators