1. An important method in program transformation, introduced by Burstall and Darlington. Many simple mathematical techniques for processing the equations and formulas of algebra and logic have important consequences when applied to programs. Folding is an example. It concerns programs that are expressed as collections of equations forming recursive function definitions (programs written in a functional language are often essentially in that form). The idea is to derive new equations, and in doing so one of the characteristic steps is to replace an instance of a right-hand side of an existing equation by the corresponding instance of the left-hand side (folding) or vice versa (unfolding). The resulting new equations form a new program equivalent to the original one. Programs derived in this way can often display significantly different efficiency conditions from the original programs.
2. A simple method of hashing a key, in which the key is subdivided into several parts that are added together to give an address. The folding ratio is the ratio of the sizes of the domain of this hashing function to the size of its range.
"folding." A Dictionary of Computing. . Encyclopedia.com. (October 19, 2018). http://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/folding
"folding." A Dictionary of Computing. . Retrieved October 19, 2018 from Encyclopedia.com: http://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/folding
Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).
Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.
Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:
Modern Language Association
The Chicago Manual of Style
American Psychological Association
- Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
- In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.