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  2. Adjustable shelving - Wikipedia

    en.wikipedia.org/wiki/Adjustable_shelving

    Common wall-fixed systems comprise parallel metal strips (attached to the wall by screws) which have slots into which brackets can be fitted to hold shelves. Free-standing shelf frames are also usually manufactured from metal (usually steel), though the shelves may be made of wood.

  3. Shelf (storage) - Wikipedia

    en.wikipedia.org/wiki/Shelf_(storage)

    Free-standing shelves can be accessible from either one or both longer length sides. A shelf with hidden internal brackets is termed a floating shelf. A shelf or case designed to hold books is a bookshelf. The length of the shelf is based upon the space limitations of its siting and the amount of weight which it will be expected to hold.

  4. Comparison of programming languages (associative array)

    en.wikipedia.org/wiki/Comparison_of_programming...

    The user can search for elements in an associative array, and delete elements from the array. The following shows how multi-dimensional associative arrays can be simulated in standard AWK using concatenation and the built-in string-separator variable SUBSEP:

  5. Python syntax and semantics - Wikipedia

    en.wikipedia.org/wiki/Python_syntax_and_semantics

    Python sets are very much like mathematical sets, and support operations like set intersection and union. Python also features a frozenset class for immutable sets, see Collection types. Dictionaries (class dict) are mutable mappings tying keys and corresponding values. Python has special syntax to create dictionaries ({key: value})

  6. Shelf support - Wikipedia

    en.wikipedia.org/wiki/Shelf_support

    A shelf support is a fastener used to hang a shelf from a wall. [1] It can be an alternative to built-in shelving or adjustable shelving. [1] There are several different types of shelf supports. A very common variant is an L-shaped shelf support, which is also called shelf bracket, and can be seen as a subset of angle brackets. There are also ...

  7. Off-side rule - Wikipedia

    en.wikipedia.org/wiki/Off-side_rule

    A group of outdents or closing brackets alone provides no contextual cues as to which blocks are being closed, necessitating backtracking, and closer scrutiny while debugging. Further, languages that allow a suffix for END-like keywords further improve such cues, such as continue versus continue for x , and end-loop marker specifying the index ...

  8. List comprehension - Wikipedia

    en.wikipedia.org/wiki/List_comprehension

    Here, the list [0..] represents , x^2>3 represents the predicate, and 2*x represents the output expression.. List comprehensions give results in a defined order (unlike the members of sets); and list comprehensions may generate the members of a list in order, rather than produce the entirety of the list thus allowing, for example, the previous Haskell definition of the members of an infinite list.

  9. Set-builder notation - Wikipedia

    en.wikipedia.org/wiki/Set-builder_notation

    Python uses an English-based syntax. Haskell replaces the set-builder's braces with square brackets and uses symbols, including the standard set-builder vertical bar. The same can be achieved in Scala using Sequence Comprehensions, where the "for" keyword returns a list of the yielded variables using the "yield" keyword.