Trimming (computer programming)

In computer programming, trimming (trim) or stripping (strip) is a string manipulation in which leading and trailing whitespace is removed from a string.

For example, the string (enclosed by apostrophes)

would be changed, after trimming, to

Variants

Definition of whitespace

The characters which are considered whitespace varies between programming languages and implementations. For example, C traditionally only counts space, tab, line feed, and carriage return characters, while languages which support Unicode typically include all Unicode space characters. Some implementations also include ASCII control codes (non-printing characters) along with whitespace characters.

Java's trim method considers ASCII spaces and control codes as whitespace, contrasting with the Java isWhitespace() method, which recognizes all Unicode space characters.

Delphi's Trim function considers characters U+0000 (NULL) through U+0020 (SPACE) to be whitespace.

Usage

Following are examples of trimming a string using several programming languages. All of the implementations shown return a new string and do not alter the original variable.

TRIM16

Tripartite motif-containing protein 16 is a protein that in humans is encoded by the TRIM16 gene.

This gene was identified as an estrogen and anti-estrogen regulated gene in epithelial cells stably expressing estrogen receptor. The protein encoded by this gene contains two B box domains and a coiled-coiled region that are characteristic of the B box zinc finger protein family. The proteins of this family have been reported to be involved in a variety of biological processes including cell growth, differentiation and pathogenesis. Expression of this gene was detected in most tissues. Its function, however, has not yet been determined.

References

Further reading

TRIM11

Tripartite motif-containing protein 11 is a protein that in humans is encoded by the TRIM11 gene.

The protein encoded by this gene is a member of the tripartite motif (TRIM) family. The TRIM motif includes three zinc-binding domains, a RING, a B-box type 1 and a B-box type 2, and a coiled-coil region. This protein localizes to the nucleus and the cytoplasm. Its function has not been identified.

References

Further reading

KMXV

KMXV ("Mix 93.3") is a Top 40 (CHR) station based in Kansas City, Missouri, United States. The Steel City Media outlet operates at 93.3 MHz with an ERP of 100 kW. Its current slogan is "Kansas City's #1 Hit Music Station". It is also one of two Top 40's competing in the Kansas City Metropolitan Area, the other being KCHZ. The station's studios are located at Westport Center in Midtown Kansas City, and the transmitter site is in the city's East Side.

The station was sold off by CBS Radio to Wilks Broadcasting in November 2006 as part of a nationwide reduction of radio stations by CBS. On June 12, 2014, Wilks announced that it is selling its Kansas City cluster (of which KMXV is part of) to Pittsburgh-based Steel City Media. The sale was approved on September 26, 2014, and was consummated on September 30.

History

The station began in 1958 as KCMK-FM (Kansas City, Missouri/Kansas), a classical station, but had several format changes (primarily country) over the next sixteen years. County DJ Jack Wesley "Cactus Jack" Call was at the station (from KCKN) for one week when he was killed on January 25, 1963 in a car crash. Singer Patsy Cline sang at a benefit for him at Memorial Hall (Kansas City, Kansas) on March 3, 1963. She was unable to leave Kansas City the next day because the airport was fogged in and was killed in a plane crash on March 5, 1963 en route from Fairfax Airport to Nashville.

MIX

MIX is a hypothetical computer used in Donald Knuth's monograph, The Art of Computer Programming (TAOCP). MIX's model number is 1009, which was derived by combining the model numbers and names of several contemporaneous, commercial machines deemed significant by the author. ("MIX" also represents the value 1009 in Roman numerals.)

The 1960s-era MIX has since been superseded by a new (also hypothetical) computer architecture, MMIX, to be incorporated in forthcoming editions of TAOCP. Software implementations for both the MIX and MMIX architectures have been developed by Knuth and made freely available (named "MIXware" and "MMIXware", respectively).

Several derivatives of Knuth's MIX/MMIX emulators also exist. GNU MDK is one such software package; it is free and runs on a wide variety of platforms.

Their purpose for education is quite similar to John L. Hennessy's and David A. Patterson's DLX architecture, from Computer Organization and Design - The Hardware Software Interface.

Architecture

MIX (Email)

MIX is a high-performance, indexed, on-disk email storage system that is designed for use with the IMAP protocol. MIX was designed by Mark Crispin, the author of the IMAP protocol. Server support for it has been included in releases of UW IMAP since 2006, Panda IMAP, and Messaging Architects Netmail. MIX is also supported directly by the Alpine e-mail client.

Design

MIX mailboxes are directories containing several types of files, including a metadata file, an index file, a dynamic status data file, a threading/sorting cache file, and a collection of files containing message content. MIX mailboxes can also contain subordinate mailboxes, which are implemented as sub directories within the MIX directory.

The MIX format was designed with an emphasis on very high scalability, reliability, and performance, while efficiently supporting modern features of the IMAP protocol. MIX has been used successfully with mailboxes of 750,000 messages.

The base level MIX format has four files: a metadata file, an index file, a status file, and some set of message data files. The metadata file contains base-level data applicable to the entire mailbox; i.e., the UID validity, last assigned UID, and list of keywords. The index file contains pointers to each unexpunged message in the message data files, along with flags, size, and IMAP internaldate data. The status file contains per-message flags and keywords.

HIStory: Past, Present and Future, Book I

HIStory: Past, Present and Future, Book I (usually shortened to HIStory) is the ninth overall studio album and his fifth under Epic Records by American recording artist Michael Jackson. It was released on June 16, 1995 by Epic Records. This is Jackson's first album on his own label, MJJ Productions, and consists of two discs: the first disc (HIStory Begins) is a compilation of some of his greatest hits from 1979 onward, while the second disc (HIStory Continues) is a studio album composed entirely of new material. The majority of the second disc's tracks were written and produced by Jackson, often in conjunction with collaborators.

HIStory was Jackson's return to releasing music following the accusation of child sexual abuse in August 1993. Many of the 15 songs pertain to the accusations and Jackson's mistreatment in the media, specifically the tabloids. The songs' themes include environmental awareness, isolation, greed, suicide and injustice.

HIStory is Jackson's most controversial album. Jackson was accused of using anti-Semitic lyrics in "They Don't Care About Us". Jackson stated that he did not mean any offense and on multiple occasions denied anti-Semitism. The dispute regarding the lyrics ended with Jackson re-recording them. R. Kelly was accused of plagiarizing one of the album's songs, "You Are Not Alone". In 2007 a judge ruled that the song was plagiarized and the song was subsequently banned from radio stations in Belgium.