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Topic: Anonymous subroutine objects pattern

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	Creational pattern - Wikipedia, the free encyclopedia
		In ['[software engineering]'], creational design patterns are design patterns that deal with object creation mechanisms, trying to create objects in a manner suitable to the situation.
		The basic form of object creation could result in design problems or added complexity to the design.
		Factory method pattern: centralize creation of an object of a specific type choosing one of several implementations
	en.wikipedia.org /wiki/Creational_pattern (114 words)

	Anonymous subroutine objects pattern - Wikipedia, the free encyclopedia
		Instead, the new object is automagically coupled to the object that it was created in, and variables that are in scope when the new object was created remain in scope and available for use in future calls.
		If you figure out where an anonymous subroutine was defined, then start reading the code leading up to it, you'll find where the variables are declared, and where their values are set.
		This code translates method calls into invocations of anonymous subroutines by the same name inside of a blessed hash: when a method is called, we look for a hash element of that name, and if we find it, we execute it as a code reference.
	en.wikipedia.org /wiki/Anonymous_subroutine_objects_pattern (1925 words)

	Learn more about Design pattern (computer science) in the online encyclopedia. (Site not responding. Last check: 2007-10-14)
		Design patterns represent the accumulated knowledge of the community of software developers of standardised solutions to recurring problems.
		A design pattern is an abstraction of a solution for a particular class of problems.
		It is important that patterns accompany a name because it makes possible to describe problems, solutions and talk about them with other folks.
	www.onlineencyclopedia.org /d/de/design_pattern__computer_science_.html (515 words)

	Subroutine References (may 96)
		One advantage of the anonymous subroutine is that it can be used in places where coming up with names might seem a little silly.
		Here, the subroutine referenced by $scanner is invoked repeatedly until its return value (stuffed into $return) has a non-blank value in it.
		In this case, the sort subroutine andsort_hash_by_value thinks it is accessing %hash, when in fact because of the alias, it is accessing %there.
	www.stonehenge.com /merlyn/UnixReview/col08.html (1738 words)

	perl.com: Bless My Referents
		In object-oriented theory, methods are just subroutines that are associated with a particular class and exist specifically to operate on objects that are instances of that class.
		Having a reference to the object passed as the first parameter is vital, because it means that the method then has access to the object on which it's supposed to operate.
		Such subroutines are usually called destructors, and are used to undo any side-effects caused by the previous existence of an object.
	www.perl.com /pub/1999/09/refererents.html (2886 words)

	CS 307 Vocabulary
		anonymous type: a type that is specified without giving it a name.
		pattern matching: testing whether an input sentence or structure matches a pattern that may contain variables.
		subroutine: a procedure that is called by another program to help it accomplish its task.
	www.cs.utexas.edu /~novak/cs307vocab.html (3242 words)

	Recipe 6.10. Speeding Up Interpolated Matches (Site not responding. Last check: 2007-10-14)
		This conversion occurs at compile time for patterns without variables in them, but at run time for those that do contain variables.
		The key here is building an anonymous subroutine that caches the compiled patterns in the closure it creates.
		Perl compiles the pattern once, when the subroutine is defined.
	www.india-seo.com /perl/cookbook/ch06_11.htm (1132 words)

	mod_perl: Perl Reference
		When you create a symbol (variable, subroutine etc.) Perl uses the name of the package in which you are currently working as a prefix to create the fully qualified name of the symbol.
		Furthermore, if the outer subroutine is anonymous and references a lexical variable outside itself, then the outer and inner subroutines will never share the given variable.
		When inner anonymous subs that reference variables in outer subroutines are called or referenced, they are automatically rebound to the current values of such variables.
	perl.apache.org /docs/general/perl_reference/perl_reference.html#Exception_Handling_for_mod_perl (11379 words)

	Perl Courses in San Francisco
		Pattern matching is the identification of patterns of letters, numbers, or other characters in a string of letters.
		Pattern matching is the parsing of a large paragraph of text and identification of parts of it that match a particular pattern.
		The pattern is designated using a "regular expression", a sequence of special symbols to represent word and character patterns.
	www.academyx.com /training/san_francisco/perl/advanced (883 words)

	Enterprise .NET Community: Iterators With C#2 (Site not responding. Last check: 2007-10-14)
		As with anonymous methods, iterators are a non-obvious but powerful feature introduced in the version 2 of C#.
		A subroutine is a function that starts its execution at the beginning of its body each time it is called.
		In the previous article concerning anonymous methods, we have seen that anonymous methods are a good means to implement the C++ notion of functors.
	www.theserverside.net /articles/showarticle.tss?id=IteratorsWithC2 (2908 words)

	Data (Site not responding. Last check: 2007-10-14)
		Binding of variables occurs according to the normal pattern matching rules, and if a match fails then that element of the list is simply skipped over.
		The empty list is a special object of its own type (it is not a pair); it has no elements and its length is zero.
		Within literal expressions and representations of objects read by the read procedure, the forms ', `,,, and,@ denote two-element lists whose first elements are the symbols quote, quasiquote, unquote, and unquote-splicing, respectively.
	www.cs.virginia.edu /~gms2w/cs655/Data.html (3360 words)

	Using LD, the GNU linker
		If a symbol in that archive is needed to resolve an undefined symbol referred to by an object in an archive that appears later on the command line, the linker would not be able to resolve that reference.
		When an object file is opened, BFD subroutines automatically determine the format of the input object file.
		Object formats can contain, for debugging purposes, some form of mapping between symbols, source line numbers, and addresses in the output file.
	www.gnu.org /software/binutils/manual/ld-2.9.1/html_mono/ld.html (14054 words)

	ActivePerl 5.8 - Online Docs : perlvar (Site not responding. Last check: 2007-10-14)
		Variables that depend on the currently selected filehandle may be set by calling an appropriate object method on the IO::Handle object, although this is less efficient than using the regular built-in variables.
		Contains the subpattern from the corresponding set of capturing parentheses from the last pattern match, not counting patterns matched in nested blocks that have been exited already.
		The object reference to the Encode object that is used to convert the source code to Unicode.
	aspn.activestate.com /ASPN/docs/ActivePerl/5.8/lib/Pod/perlvar.html (3919 words)

	APPENDIX E: ANONYMOUS FTP
		We are pleased to announce the release of new object oriented language based on C. The language has support for concurrent object execution with synchronous or asynchronous message pssaing and wait when necessary reply handling.
		An object is made persistent either by its declaration (via a new "persistent" storage class qualifier) or by its method of allocation (via persistent dynamic allocation using a special overloading of the new operator).
		Each object is identified by a unique object id (i.e., a persistent pointer, or to be precise, a pointer to a persistent object).
	www.objectfaq.com /oofaq2/body/ftpb.htm (17053 words)

	Comparison of C++ and Fortran 90 for Object-Oriented Scientific Programming
		Each of these objects consists of both the internal data representation and methods (both for internal use by the object itself and for external use) for interacting with that data.
		Rather than developing a completely new abstract object, one would like to define a new abstract object that inherits the old data and methods, can alter the behavior of some functions to match the semantics of the new object, and can add new data or methods as needed.
		In addition, pointer casting may be used in order to access polymorphic object behavior, by casting a pointer to an object of some base class to be a pointer to an object of a derived class.
	www.amath.washington.edu /~lf/software/CompCPP_F90SciOOP.html (5322 words)

	Epsilon Editor is a toolbox full of premium tools to get your job done quickly & easily
		The subroutine happens to be defined in another file.
		Give it some text to search for (or a pattern, with all the same options as above available) and a file name with wild cards, and Epsilon constructs a list of lines containing the text, so you can see all the matches at once.
		Epsilon uses an enhanced syntax for file patterns so you can easily tell it to search files meeting certain conditions: for example, search in all.c or.h files whose names start with a digit, in either the C:\NewProject hierarchy or anywhere on drives D or E. Now, take a look at Epsilon's file comparing commands.
	hallogram.com /epsiloneditor (2445 words)

	Data::Dump::Streamer - Accurately serialize a data structure as Perl code. - search.cpan.org
		When dumping an object of a given class the first time it tries to execute the class specific handler if it is specified, then the user specific generic handler if its been specified and then "DDS_freeze".
		The basic idea is to specify a subroutine which takes a hash as an argument and returns a reference to an array containing the keys to be dumped.
		Allows a given object or class to be ignored, and replaced with a string containing the name of the item ignored.
	search.cpan.org /perldoc?Data::Dump::Streamer (4981 words)

	Object Encapsulation Made Easy (extended abstract) (Site not responding. Last check: 2007-10-14)
		In Perl, objects are typically just hashes (or sometimes arrays or scalars) that have been associated with a particular package.
		Accessors call the anonymous subroutine, which then decides whether (and how) to grant access to the lexical.
		It reports the current location details (package, file, line, and subroutine), the key and value of each entry of the securehash (categorized by owner), and the specific accessibility of each entry at the point where it was called.
	www.csse.monash.edu.au /~damian/TPC/1999/Encapsulation/ExtendedAbstract.html (860 words)

	perl.com: Synopsis 6
		If a subroutine is not explicitly scoped, then it belongs to the current namespace (module, class, grammar, or package).
		These traits may be declared on the subroutine as a whole (not on individual parameters).
		The block of code executed when the subroutine is called -- normally declared implicitly, by providing a block after the subroutine's signature definition.
	www.perl.com /pub/a/2003/04/09/synopsis.html?page=3 (772 words)

	The GNU C Library - C Language Facilities Implemented By the Library
		A required argument can be used as a pattern to specify both the number and types of the optional arguments.
		This is an unsigned integer type used to represent the sizes of objects.
		Most of the time, if you choose the proper C data type for each object in your program, you need not be concerned with just how it is represented or how many bits it uses.
	www.cs.utah.edu /dept/old/texinfo/glibc-manual-0.02/library_28.html (4259 words)

	Catalog of compilers, interpreters, and other language tools [p4of5]
		The result is a language that can directly support functional, object oriented and logic programming styles in a unified and controlled framework.
		It is an object oriented framework within which diverse models of computation can co-exist and interact.
		The parse tree (in the form of an object tree) is provided, you would just need to add your own transformations.
	www.cs.uu.nl /wais/html/na-dir/compilers/free/part4.html (8429 words)

	perl
		Perl variables may now be declared within a lexical scope, like ``auto'' variables in C. Not only is this more efficient, but it contributes to better privacy for ``programming in the large''.
		A major new module is the POSIX module, which provides access to all available POSIX routines and definitions, via object classes where appropriate.
		In fact, the old dbmopen interface has been generalized to allow any variable to be tied to an object class which defines its access methods.
	www.uga.edu /~ucns/wsg/unix/perl/manuals/perl.html (1399 words)

	Compiling regular expressions (oct 99)
		One way is to use an anonymous subroutine that is compiled once for each change in the pattern variable.
		in the anonymous subroutine generates a ``closure'', which remembers the value of
		independently as long as the subroutine is alive.
	www.stonehenge.com /merlyn/UnixReview/col28.html (1366 words)

	'Cons - Software Construction System'
		Other variables, objects, etc. can be exported by reference--but all scripts will refer to the same object, and this object should be considered to be read-only by the subsidiary scripts and by the original exporting script.
		To build the target file, the referenced subroutine is passed, in order: the construction environment used to generate the target; the path name of the target itself; and the path names of all the source files necessary to build the target file.
		All of the contributing objects from all the invocations (which may be from different directories) are combined and generated by a single archive command.
	www.gnu.org /software/cons/dev/cons.html (14250 words)

	Apocalypse 5: Pattern Matching -
		Every regex match maintains a state object, and any closure within the regex is actually an anonymous method of that object, which means in turn that the closure's topic is the current state object.
		Because the state object is aware of how the tree is being built, when backtracking occurs the object can destroy parts of the parse tree that were conjectured in error.
		It might be objected that matching against a subroutine rather than an infinite string or array has the benefit of not promising to keep around the entire string or array in memory.
	dev.perl.org /perl6/apocalypse/A05.html (14670 words)

	perldelta - what is new for perl v5.8.1
		If your destructors (the DESTROY subroutines) have assumed any particular ordering to the global destruction, there might be problems ahead.
		For example, in a destructor of one object you cannot assume that objects of any other class are still available, unless you hold a reference to them.
		There have been many fixes in the area of anonymous subs, lexicals and closures.
	theoryx5.uwinnipeg.ca /CPAN/perl/pod/perldelta.html (4221 words)

	perl(1)
		And the tables used by hashes (previously called "associative arrays") grow as necessary to prevent degraded performance.
		Anonymous subroutines exhibit deep binding of lexical variables (closures).
		+ Subroutine definitions may now be autoloaded In fact, the AUTOLOAD mechanism also allows you to define any arbitrary semantics for undefined subroutine calls.
	www.uwm.edu /cgi-bin/Dept/IMT/wwwman?topic=perl(1)&msection=5 (1390 words)

	Buffalo, New York, Perlmongers - @\|^\|`
		The usefulness of Perl for text manipulation and pattern matching has been argued to have saved the genome project.
		The last time he was up here, he was kind enough to give a talk on object-oriented Perl to Buffalo PM.
		It was an excellent introductory tour of OO Perl, and will be included in his new book, Learning Perl Objects, References & Modules (O'Reilly & Associates), due out June 2003.
	buffalo.pm.org (2370 words)

	Genetics 211, Genomics, Suggested Reading
		Learning Perl Objects, References and Modules (1st edition), by Randal L. Schwartz with Tom Phoenix.
		A good book on how to operate more efficiently in the most common UNIX environments.
		Object Oriented Perl, by Damian Conway and Randal Schwartz.
	www.stanford.edu /class/gene211/perl-reading.html (1054 words)

	[No title]
		=item * Arbitrarily nested data structures Any scalar value, including any array element, may now contain a reference to any other variable or subroutine.
		=item * POSIX compliant A major new module is the POSIX module, which provides access to all available POSIX routines and definitions, via object classes where appropriate.
		=item * Subroutine definitions may now be autoloaded In fact, the AUTOLOAD mechanism also allows you to define any arbitrary semantics for undefined subroutine calls.
	www.ibiblio.org /pub/historic-linux/distributions/redhat/4.2/alpha/live/usr/lib/perl5/pod/perl.pod (1454 words)

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