clean

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clean

1. 
a. (of a nuclear weapon) producing little or no radioactive fallout or contamination
b. uncontaminated
2. (of a wound, etc.) having no pus or other sign of infection
3. Aeronautics causing little turbulence; streamlined
4. (of an aircraft) having no projections, such as rockets, flaps, etc., into the airstream
5. Nautical of a vessel
a. having its bottom clean
b. having a satisfactory bill of health
6. Old Testament
a. (of persons) free from ceremonial defilement
b. (of animals, birds, and fish) lawful to eat
7. New Testament morally and spiritually pure

clean

i. An aircraft that is not carrying external stores like drop tanks or armament.
ii. An aircraft in flight but with the undercarriage, flaps, and airbrakes retracted.

Clean

(language)
A lazy higher-order purely functional language from the University of Nijmegen. Clean was originally a subset of Lean, designed to be an experimental intermediate language and used to study the graph rewriting model. To help focus on the essential implementation issues it deliberately lacked all syntactic sugar, even infix expressions or complex lists,

As it was used more and more to construct all kinds of applications it was eventually turned into a general purpose functional programming language, first released in May 1995. The new language is strongly typed (Milner/Mycroft type system), provides modules and functional I/O (including a WIMP interface), and supports parallel processing and distributed processing on loosely coupled parallel architectures. Parallel execution was originally based on the PABC abstract machine.

It is one of the fastest implementations of functional languages available, partly aided by programmer annotations to influence evaluation order.

Although the two variants of Clean are rather different, the name Clean can be used to denote either of them. To distinguish, the old version can be referred to as Clean 0.8, and the new as Clean 1.0 or Concurrent Clean.

The current release of Clean (1.0) includes a compiler, producing code for the ABC abstract machine, a code generator, compiling the ABC code into either object-code or assembly language (depending on the platform), I/O libraries, a development environment (not all platforms), and documentation. It is supported (or will soon be supported) under Mac OS, Linux, OS/2, Windows 95, SunOS, and Solaris.

http://cs.kun.nl/~clean/. E-mail: <clean@cs.kun.nl>. Mailing list: <clean-request@cs.kun.nl>.

["Clean - A Language for Functional Graph Rewriting", T. Brus et al, IR 95, U Nijmegen, Feb 1987].

["Concurrent Clean", M.C. van Eekelen et al, TR 89-18, U Nijmegen, Netherlands, 1989].

clean

(jargon)


1. Used of hardware or software designs, implies "elegance in the small", that is, a design or implementation that may not hold any surprises but does things in a way that is reasonably intuitive and relatively easy to comprehend from the outside. The antonym is "grungy" or crufty.

2. To remove unneeded or undesired files in a effort to reduce clutter: "I'm cleaning up my account." "I cleaned up the garbage and now have 100 Meg free on that partition."
References in periodicals archive ?
Golcar's Nore Beaumont said: "We carry out the clean ups on a regular basis at our Golcar Lily days.
Yorkville -Volunteers will join forces with the Friends of the Fox River and will clean up the banks of the Fox River.
They would like to see the takeaway owners obliged by law to clean up after their careless customers.
And in May, pupils from John Gulson School in George Street, Foleshill, stopped lessons to clean up their school grounds and part of the streets outside.
The Italian government has allotted funds for clean up of high environmental risk areas in Italy.
While it is their responsibility to clean up other people's mess it is those who insist on dumping the stuff in the first place who are the real culprits.
He said: "The people who clean up the area are like butterflies - they all appear at once and then you don't see them for another season.
TRC) (NYSE:TRR) announced today that it has been selected by a group of industrial customers for the clean up of the Mattiace Petrochemical Superfund site located in Glen Cove, New York.
But at the same time we're seeing lenders who are terrified of getting stuck with a big EPA-mandated clean up on a property, take the coverage, too.
The company currently has approximately 175 contracts for the clean up of known contaminated sites regulated by the Kentucky Underground Storage Tank Program.