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.
Draft (hull)
The draft (American) or draught (British) of a ship's hull is the vertical distance between the waterline and the bottom of the hull (keel), with the thickness of the hull included; in the case of not being included the draft outline would be obtained. Draft determines the minimum depth of water a ship or boat can safely navigate. The draft can also be used to determine the weight of the cargo on board by calculating the total displacement of water and then using Archimedes' principle. A table made by the shipyard shows the water displacement for each draft. The density of the water (salt or fresh) and the content of the ship's bunkers has to be taken into account. The closely related term "trim" is defined as the difference between the forward and aft drafts.
Drafts of a ship
Free (Marcus Miller album)
Free is an album by jazz bassist Marcus Miller, released in 2007.
The album's title track is a cover of the 1977 Deniece Williams song. UK soul singer Corinne Bailey Rae provided lead vocals. "Higher Ground" is a song originally recorded by Stevie Wonder, and "What Is Hip" was originally performed by Tower of Power. "Jean Pierre" was originally performed by Miles Davis (On "We Want Miles", 1982). Blues singer Keb' Mo' performs lead vocals and co-wrote with Marcus Miller the track entitled "Milky Way".
The album's US version has not only a new title, Marcus, but the tracks have been remixed/recut. Four additional tracks have been added to the album as well.
Track listing
All tracks produced by Marcus Miller and David Isaac.
External links
Free (Rivermaya album)
Free, is the fifth album from the Filipino rock band, Rivermaya. It has 10 tracks and was released independently on the internet, literally given away for free which is another first for any Filipino artist. “Free” was also named Album of the Year in the NU Rock Awards 2000 & is the last album with Nathan Azarcon.
The song "Imbecillesque" was re-released on their 2005 EP entitled "You'll Be Safe Here". The song "Straight No Chaser" was later covered by actor and reggae artist Boy2 Quizon.
On the back cover of the album, tracks #7 and #8 were typed incorrectly as in the order of the songs in the album.
Track listing
All songs written, arranged and produced by Rico Blanco except track 3 and 8 by Nathan Azarcon.
Personnel
References
External links
Free... (EP)
Free... is an EP by stoner metal band Acid King. It was released in February 2001 on Man's Ruin Records, as a split CD with Clearlight. The first four songs are performed by Acid King, and the remaining two by Clearlight. The Clearlight portion is entitled The Father, the Son and the Holy Smoke.
Free... features Guy Pinhas performing bass, and is the first Acid King album on which he appears. Pinhas left the band after performing bass on their next album, III.
The cover artwork is a photograph of Acid King's frontwoman Lori S. holding her motorcycle helmet.
Track listing (Acid King portion)
Podcasts:
