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.

See the various entries for Tcl

• Category: Object Oriented, Dynamically typed, Has anonymous functions

• Various

  min / max	comparison (min / max (binary or more))
  info frame 0	information about the current line and file

• Functions

  [list {a b} {...}]	anonymous function
  [apply f a b]	function call

• Package, Module

  automatically done based on the file name

  declare

• Bags and Lists

  in	is an element in the list
  {*}$l	list flattening (one level depth)
  lreverse	reverse

  Unknown:

  transform a list (or bag) in another one
  transform two lists in parallel
  is the predicate true for an element
  is the predicate true for every element
  f(... f(f(init, e1), e2) ..., en)

• Various Data Types

  dict get	dictionary (access: read)
  dict set	dictionary (access: write)
  dict create a b c d	dictionary (constructor)
  dict exists	dictionary (has the key ?)
  dict keys	dictionary (list of keys)
  dict values	dictionary (list of values)
  dict remove	dictionary (remove by key)

  Unknown:

  optional value (null value)
  optional value (value)
  optional value (null coalescing)
  record (selector)
  range

• Mathematics

  **	exponentiation (power)
  sqrt,isqrt / exp / abs	square root / e-exponential / absolute value