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.

Trim (computing)

A Trim command (known as TRIM in the ATA command set, and UNMAP in the SCSI command set) allows an operating system to inform a solid-state drive (SSD) which blocks of data are no longer considered in use and can be wiped internally.

Trim was introduced soon after SSDs were introduced. Because low-level operation of SSDs differs significantly from hard drives, the typical way in which operating systems handle operations like deletes and formats resulted in unanticipated progressive performance degradation of write operations on SSDs. Trimming enables the SSD to handle garbage collection overhead, which would otherwise significantly slow down future write operations to the involved blocks, in advance.

Although tools to "reset" some drives to a fresh state were already available before the introduction of trimming, they also delete all data on the drive, which makes them impractical to use for ongoing optimization. By 2014 many SSDs had internal idle/background garbage collection mechanisms that work independently of trimming; although this successfully maintains their performance even under operating systems that do not support Trim, it has the associated drawbacks of increased write amplification and wear of the flash cells.

Trim (sewing)

Trim or trimming in clothing and home decorating is applied ornament, such as gimp, passementerie, ribbon, ruffles, or, as a verb, to apply such ornament.

Before the industrial revolution, all trim was made and applied by hand, thus making heavily trimmed furnishings and garments expensive and high-status. Machine-woven trims and sewing machines put these dense trimmings within the reach of even modest dressmakers and home sewers, and an abundance of trimming is a characteristic of mid-Victorian fashion. As a predictable reaction, high fashion came to emphasize exquisiteness of cut and construction over denseness of trimming, and applied trim became a signifier of mass-produced clothing by the 1930s. The iconic braid and gold button trim of the Chanel suit are a notable survival of trim in high fashion.

In home decorating, the 1980s and 1990s saw a fashion for dense, elaborately layered trimmings on upholstered furniture and drapery.

Today, most trimmings are commercially manufactured. Scalamandré is known for elaborate trim for home furnishings, and Wrights is a leading manufacturer of trim for home sewing and crafts. Trims are used generally to enhance the beauty of the garments. It attracts buyers. Appropriate use of it creates more value of the product.

List of Teenage Mutant Ninja Turtles characters

The following is a list of main characters in the Teenage Mutant Ninja Turtles franchise.

Main protagonists

Teenage Mutant Ninja Turtles

The Teenage Mutant Ninja Turtles are a team of mutant red-eared sliders named after four Renaissance artists and living in the sewers of New York City, where they train by day and fight crime by night as ninjas.

Leonardo

Leonardo is the tactical, courageous leader of the Ninja Turtles and a devoted student of Ninjutsu, usually wearing a blue mask and wielding two katanas.

Michelangelo

Michelangelo is the most comical of the Ninja Turtles, usually wearing an orange mask and wielding a pair of nunchucks.

Donatello

Donatello is the scientist, inventor, engineer and technological genius of the Ninja Turtles, usually wearing a purple mask and wielding a bo-staff.

Raphael

Raphael is the bad boy of the Ninja Turtles, wearing a red mask and wielding a pair of sais.

Supporting characters

Splinter

Splinter is the mutant rat sensei and adoptive father of the Ninja Turtles, trained in Ninjutsu by his owner and master, Hamato Yoshi, in Japan.

War (painting)

War is a painting created by Portuguese-British visual artist Paula Rego in 2003.

Description

War is a large pastel on paper composition measuring 1600mm x 1200mm. A rabbit-headed woman stands prominently in the center carrying a wounded child, surrounded by several realistic and fantastic figures recalling a style Rego describes as "beautiful grotesque".

For The Telegraph's Alastair Sooke, "The more you look at War, the curiouser and curiouser it becomes. Rego's white rabbits owe more to Richard Kelly's film Donnie Darko than Lewis Carroll's Wonderland."

Background

The painting first appeared as part of Rego's "Jane Eyre and Other Stories" exhibition at Marlborough Fine Art in London in 2003. It was inspired by a photograph that appeared in The Guardian near the beginning of the Iraq War, in which a girl in a white dress is seen running from an explosion, with a woman and her baby unmoving behind her. In an interview conducted in relation to the Museo Nacional Centro de Arte Reina Sofía's 2007 exhibition, Rego said of this painting, "I thought I would do a picture about these children getting hurt, but I turned them into rabbits' heads, like masks. It’s very difficult to do it with humans, it doesn’t get the same kind of feel at all. It seemed more real to transform them into creatures."

Ottoman–Persian War (1821–23)

The Ottoman–Qajar War was fought between the Ottoman Empire and Qajar Empire from 1821 to 1823.

Reasons

Tensions between the two empires had been rising due to the Ottoman Empire's harboring of rebellious tribesmen from Iranian Azerbaijan. Although secretly, the Russian Empire was attempting to put pressure on the Ottoman Empire, which was at war with the Greeks.

War

Crown Prince Abbas Mirza of Persia, at the instigation of the Russian Empire, invaded Western Armenia and the areas surrounding Iranian Azerbaijan. The governor of Baghdad's invasion of Persia is defeated by Mohammed Ali Mirza who then besieges Baghdad, his untimely death ends the siege. Meanwhile, Abbas Mirza marched into eastern Anatolia with 30,000 troops and met an Ottoman army of 50,000 at the Battle of Erzurum. Abbas Mirza scored a crushing defeat over the Ottomans despite being severely outnumbered and his army suffering from a cholera epidemic.

Thanks to the recent modernisations, the so-called "Nezam-i-Jadid" reforms of the Persian army according latest European model made possible by Abbas Mirza's brother, Dowlatshah, it made the army qualitatively far superior over that of their Ottoman Turkish arch rivals, despite being severely outnumbered.