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Topic: Global variable

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	Programming Techniques:Global Variables - GPWiki
		Multiple blocks of code accessing a global variable are dependent on each other (because of their mutual dependence on the variable), yet the relationship between them is indirect and even further-removed.
		In addition, the state of an object dependent on a global variable is dependent on the state of the global variable, which is not under its control.
		Removing the ability to access the internal state of a global variable does not make it less global, but it does reduce the coupling, and it also reduces the coupling between separate blocks of code that are dependent on the global variable.
	gpwiki.org /index.php/Programming_Techniques:Global_Variables (702 words)

	Global variable - Wikipedia, the free encyclopedia
		In computer programming, a global variable is a variable that does not belong to any subroutine in particular and can therefore can be accessed from any context in a program.
		They are usually considered bad practice precisely because of their nonlocality: a global variable can potentially be modified from anywhere, and any part of the program may depend on it.
		Compare this with a constant, which can be seen as a read-only global variable (even though this use of variable is an oxymoron).
	en.wikipedia.org /wiki/Global_variable (192 words)

	MusicWonk Global Variable Module
		Global variables are not the same as the local Const and LocVar modules, which are regular modules that are only accessible at the local macro level.
		Global variables exist in two parts, the variable data base which is global and accessible at any macro level, and the local variable module that accesses the global variable, which only exists at the local macro level.
		Global Variables must have unique names, so the first thing to do is give the variable a name (which will create a new variable) or select a variable already existing, with the drop down Name list box in the upper left corner of the property dialog.
	algoart.com /help/musicwonk/globalvariable.htm (579 words)

	Lab 9 - Scope, Lifetime, and More on Functions
		A global variable is similar to a static variable since a global variable exists during the duration of the program.
		A static variable is similar to a global variable in that its memory remains for the lifetime of the entire program.
		However, a static variable is different from a global variable because a static variable's scope is local to the function in which it is defined.
	www.mtsu.edu /~csci117/manual/lab9/lab9.html (0 words)

	Globalization @ Globalists.com (Site not responding. Last check: )
		Some maintain that globalization is an imagined geography; that is, a political tool of ruling neo-liberalists, who are attempting to use certain images and discourses of world politics to justify their political agendas.
		A consequence of economic globalization is increasing relations among members of an industry in different parts of the world (globalization of an industry), with a corresponding erosion of national sovereignty in the economic sphere.
		Globalization (or globalisation) is a social change, an increased connectivity among societies and their elements due to transculturation; the explosive evolution of transport and communication technologies to facilitate international cultural and economic exchange.
	www.globalists.com (0 words)

	Variable - lslWiki
		Variables can be declared wherever code can be run, as well as before the default state (see global variable).
		Variables have a scope which is either local or global.
		Variable names that contain the characters: left single quote (`), hash/number sign (#), dollar sign ($), backslash (\), right single quote ('), and question mark (?) at the beginning or end of the variable name will not report an error but these characters will be ignored.
	rpgstats.com /wiki/index.php?title=Variable (543 words)

	Reference Manual: Global and Local Variables - BroWiki
		They can be global or local in scope; modifiable or constant (unchangeable); explicitly or implicitly typed; optionally initialized; defined to have additional attributes; and, for global variables, redefined to have a different initialization or different attributes from their first declaration.
		Global variables are available throughout your policy script (once declared), while the scope of local variables is confined to the function or event handler in which they're declared.
		The utility of marking a variable as unmodifiable is for clarity in expressing your script---making it explicit that a particular value will never change---and also allows Bro to possibly optimize accesses to the variable (though it does little of this currently).
	www.bro-ids.org /wiki/index.php/Reference_Manual:_Global_and_Local_Variables (971 words)

	[No title] (Site not responding. Last check: )
		The purpose is to carry the global/local variable scope meaning from Release 2, into the new form and rules of the next release.
		The global statement is placed in the procedure after the local statement or, if none, before the first statement of the procedure.
		Note that w is a global variable under the old and new rules and it does not need to be included in a global state- ment.
	zephyr.rice.edu /comp.res/software/unix/manpages/updtsrc.html (0 words)

	Lua variable scoping - WoWWiki, the Warcraft wiki
		Variables can exist in two forms: "global," or "local." A global variable is accessible to everything and is not limited.
		These types of local variables are especially effective for variables which may need to be accessed throughout the file in which they are declared (often times, this is the entire addon), but never needed outside of that file.
		Global variables are only used in the event that a local variable does not exist at the current scope.
	www.wowwiki.com /Lua_variable_scoping (1840 words)

	PHP: Variable scope - Manual (Site not responding. Last check: )
		You may notice that this is a little bit different from the C language in that global variables in C are automatically available to functions unless specifically overridden by a local definition.
		array is an associative array with the name of the global variable being the key and the contents of that variable being the value of the array element.
		If you want to access a variable such as a cookie inside a function, but theres a chance it may not even be defined, you need to access it using he GLOBALS array, not by defining it as global.
	us3.php.net /global (0 words)

	Global and satic variables
		Global variables are not limited to a particular function.
		A global variable is declared just like a local variable, and all the normal initialization rules apply (like the stuff for arrays).
		We could have made x a global variable, and that would work too, but this could be one of those cases where it is bad style.
	home.earthlink.net /~azraelle/Cweb/statglob.htm (0 words)

	Namespaces (Site not responding. Last check: )
		Package variables are global, which is dangerous, because you can never be sure that someone else isn't tampering with them behind your back.
		These `my variables' are sometimes called `lexical' because their scope depends only on the program text itself, and not on details of execution, such as what gets executed in what order.
		You should avoid using global variables because it can be hard to be sure that no two parts of the program are using one another's variables by mistake.
	perl.plover.com /FAQs/Namespaces.html (0 words)

	Global Variables Are Bad
		Global variables can be read or modified by any part of the program, making it difficult to remember or reason about every possible use.
		Static variables within a namespace are limited to that namespace (unless someone exports 'em somehow); in general when I see a static variable I look for a way to turn it into an object.
		Also, although a static variable within a namespace probably is not a global, it exhibits the same problems as a global variable within a reduced scope.
	c2.com /cgi/wiki?GlobalVariablesAreBad (2809 words)

	2.1 Global Variables
		By ``global variables'', we mean anything that is stored at a fixed, preallocated location in memory.
		Global variables are shared by all the threads on a processor, which makes using global variables extremely error prone.
		One standard practice is to collect all the globals into a C struct or Fortran type named ``Globals", and pass a pointer to this object to all your subroutines.
	charm.cs.uiuc.edu /manuals/html/tcharm/2_1Global_Variables.html (371 words)

	Variable Names
		Variables declared within a procedure (except when they are declared by using the Static keyword) are visible only within the procedure where they are declared and have a lifetime that lasts only so long as the code within the procedure is executing.
		Global variables have a lowercase "g" prefix and are declared in the Declarations section of a module by using the Public statement.
		Array variables have a lowercase "a" prefix and, unless the variable is a variant, are followed by a pair of parentheses.
	msdn.microsoft.com /library/default.asp?url=/library/en-us/odeopg/html/deconvariablenames.asp (888 words)

	Proc Chart Locals (Site not responding. Last check: )
		One is the global variable x (whose value is 0).
		Since the CPU is in main, the global variable x is hidden by the local variable x - seen in local context #100.
		Also notice that although main cannot see the global variable x since it is hidden by main's local variable x, nonetheless, show can see the global x even when called by main.
	core.ecu.edu /csci/wirthj/ProcActiv/ParametersA-c.html (0 words)

	Global Variables - Untitled
		global a global a b global c = 2 global d = 3 e f = 5
		It is necessary declare a variable as global within a function body in order to access it.
		Passing a global variable in a function parameter list will make a local copy and not modify the global value.
	www.gnu.org /software/octave/doc/interpreter/Global-Variables.html (195 words)

	PHP: Variable scope - Manual
		You may notice that this is a little bit different from the C language in that global variables in C are automatically available to functions unless specifically overridden by a local definition.
		In PHP global variables must be declared global inside a function if they are going to be used in that function.
		If you specify a variable as global, it does not mean you are accessing a variable in the calling function's namespace, it means you are accessing the variable in the global namespace.
	www.php.net /manual/en/language.variables.scope.php (4846 words)

	Global Variables
		The only time a truly unique global variable is needed is when a value is to be shared with another chart.
		Global Variables [0] through [239] are public, and can be read or written by any study or draw tool.
		Panel B may be a Global Action that is always done, or conditionally done depending on the result of panel A. Panel B may use the value stored by Panel A because the GV was written before before panel B is evaluated.
	www.ensignsoftware.com /help/globalvariables.htm (2575 words)

	CleanCode::Code::Variables (VR1)
		Global variables were first, but certainly not best.
		Defining globals in a file which may be used unrestricted within that file--Def.
		5 global; that is, it is global to the block defined by the
	cleancode.sourceforge.net /wwwdoc/codingRules/vr1.html (0 words)

	The Old Joel on Software Forum - Global Variable Subtlety
		Having globals limits reuse, because any code you try and reuse will have to bring the global along with it, which means you need to FIND the darn thing.
		When it is said that global variables are bad, it is not so much the existance of global variables but rather what they are used for.
		Global Variables are said to be bad for all the reasons given previous, they are hard to debug, they make functions have hidden dependencies (the function definition doesn't tell you what it does, without reading it's entire source), they make it impossible to easily extract and re-use some code.
	discuss.fogcreek.com /joelonsoftware/default.asp?cmd=show&ixPost=43421 (2026 words)

	C Languages Difference Between Static & Global Variable
		Static variables are local in scope to their module in which they are defined, but life is throughout the program.
		On the other hand global variables have to be defined globally, persists (life is) throughout the program, scope is also throughout the program.
		So if you have a global variable and u r distributing ur files as a library and you want others to not access your global variable, you may make it static by just prefixing keyword static (of course if same variable is not required in other files of yours).
	c.ittoolbox.com /documents/popular-q-and-a/difference-between-static-global-variable-1596 (725 words)

	passing XML tag as global variable within XSL StyleSheet - Dev Shed
		I may be misunderstanding what you need but it seems like declaring a variable at the top of your page is what you need (outside any template).
		Anytime you declare a variable within a template it is localized to that template.
		Also as far as i know variables are only available to the document in which they reside.
	forums.devshed.com /xml-programming-19/passing-xml-tag-as-global-variable-within-xsl-stylesheet-70775.html (0 words)

	The PHP Global Statement - PHP
		In our previous tutorial, you learned that a variable created outside of a PHP function is not available to be used by that function.
		Another way to make an "outside" variable available to a function is to use the PHP global statement.
		This is the global statement that will make the value to the $first_name variable available to the function.
	www.bellaonline.com /ArticlesP/art28412.asp (0 words)

	Thunderstone: Variable Scope: Global vs. Local
		Global variables are useful for values that are relatively constant, or that many functions in the script must access, such as a session id.
		A local variable, however, has a limited scope: it exists only within the block that it is declared in.
		They are used to clearly pass parameters to functions, or as temporary ``scratch space'' for a function without the side effects of global variable modification.
	www.thunderstone.com /site/vortexman/variable_scope_global_vs_local.html (315 words)

	global :: Functions (MATLAB Function Reference)
		Any assignment to that variable, in any function, is available to all the functions declaring it global.
		If a variable with the same name as the global variable already exists in the current workspace, MATLAB issues a warning and changes the value of that variable to match the global.
		To use a global within a callback, declare the global, use it, then clear the global link from the workspace.
	www.mathworks.com /access/helpdesk/help/techdoc/ref/global.html (312 words)

	global and local variables in javascript functions - understanding variable scope in javascript
		Since functions are separate from the main code, it's advisable to use variables that are initialized only when a function is called and die when the execution comes out of the function.
		Global variables on the other hand are present throughout the script and their values can be accessed by any function.
		In this case, we don't use the var keyword, hence the global variable is used inside the function.
	www.webdevelopersnotes.com /tutorials/javascript/global_local_variables_scope_javascript.php3 (620 words)

	EPOCH Global Variable Utilities
		The EPOCH C++ implementation of a client interface accesses global variables directly out of shared memory, thus requiring that an EPOCH global server be running on the client's host.
		When a client needs to access global variables residing on another machine, the local global server communicates with the remote global server in order to provide a mirror image of the remote machine's shared memory segment.
		A network connection is established with the home global server for the stream's segment and a list of the variables in the segment is downloaded and saved by the GV_UTIL package.
	www.geonius.com /software/epoch3/gv_util.html (551 words)

	Redstone's Eggplant Community :: View topic - how to use global variable
		There are two ways to indicate that a variable is a global: either declare it on a global declaration line (a line beginning with the word "global" followed by a comma-separated list of variable names); or use the word "global" before the variable name in each place where it is used in the script.
		Universal variables work just the same as global variables, except that they retain their values across different script runs in the same Eggplant session (until you quit Eggplant).
		The only way to access global or universal variables is to declare them as such in each handler where you need access to them.
	www.redstonesoftware.com /phpbb2/viewtopic.php?t=184 (0 words)

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