Rope (data structure)

In computer programming, a rope, or cord, is a data structure composed of smaller strings that is used for efficiently storing and manipulating a very long string. For example, a text editing program may use a rope to represent the text being edited, so that operations such as insertion, deletion, and random access can be done efficiently.

Description

A rope is a binary tree having leaf nodes that contain a short string. Each node has a weight value equal to the length of its string plus the sum of all leaf nodes' weight in its left subtree, namely the weight of a node is the total string length in its left subtree for a non-leaf node, or the string length of itself for a leaf node. Thus a node with two children divides the whole string into two parts: the left subtree stores the first part of the string. The right subtree stores the second part and its weight is the sum of the left child's weight and the length of its contained string.

The binary tree can be seen as several levels of nodes. The bottom level contains all the nodes that contain a string. Higher levels have fewer and fewer nodes. The top level consists of a single "root" node. The rope is built by putting the nodes with short strings in the bottom level, then attaching a random half of the nodes to parent nodes in the next level.

Rope (disambiguation)

Rope is a length of non-metallic fibers twisted or braided together

Rope may also refer to:

Computing

Entertainment

Other uses

Rope (play)

Rope is a 1929 British play by Patrick Hamilton. In formal terms, it is a well-made play with a three-act dramatic structure that adheres to the classical unities. Its action is continuous, punctuated only by the curtain fall at the end of each act. It may also be considered a thriller whose gruesome subject matter invites comparison to the Grand Guignol style of theatre. Samuel French published the play in 1929.

Plot and setting

The play is set on the first floor of a house in Mayfair, London in 1929. The story, thought to be based loosely on the Leopold and Loeb murder case, concerns two young university students, Wyndham Brandon and Charles Granillo (whom Brandon calls "Granno"), who have murdered fellow student Ronald Kentley as an expression of their supposed intellectual superiority. At the beginning of the play they hide Kentley's body in a chest. They proceed to host a party for his friends and family at which the chest containing his corpse is used to serve a buffet.

Production history

Plane

Plane or planes may refer to:

Plane or aircraft

Science and technology

Other uses

Plane (tool)

A hand plane is a tool for shaping wood. When powered by electricity, the tool may be called a planer. Planes are used to flatten, reduce the thickness of, and impart a smooth surface to a rough piece of lumber or timber. Planing is used to produce horizontal, vertical, or inclined flat surfaces on workpieces usually too large for shaping. Special types of planes are designed to cut joints or decorative mouldings.

Hand planes are generally the combination of a cutting edge, such as a sharpened metal plate, attached to a firm body, that when moved over a wood surface, take up relatively uniform shavings, by nature of the body riding on the 'high spots' in the wood, and also by providing a relatively constant angle to the cutting edge, render the planed surface very smooth. A cutter which extends below the bottom surface, or sole, of the plane slices off shavings of wood. A large, flat sole on a plane guides the cutter to remove only the highest parts of an imperfect surface, until, after several passes, the surface is flat and smooth. When used for flattening, bench planes with longer soles are preferred for boards with longer longitudinal dimensions. A longer sole registers against a greater portion of the board's face or edge surface which leads to a more consistently flat surface or straighter edge. Conversely, using a smaller plane allows for more localized low or high spots to remain.

Pláně (Plzeň-North District)

Pláně is a village and municipality (obec) in Plzeň-North District in the Plzeň Region of the Czech Republic.

The municipality covers an area of 13.91 square kilometres (5.37 sq mi), and has a population of 259 (as at 3 July 2006).

Pláně lies approximately 23 kilometres (14 mi) north of Plzeň and 82 km (51 mi) west of Prague.

References