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Topic: Uninitialized variable

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	Variable - Encyclopedia.WorldSearch (Site not responding. Last check: 2007-11-06)
		In mathematics, variables are usually represented by letter s of the Roman alphabet, but are also represented by letters of other alphabet s; as well as various other symbol s.
		Variables are useful in mathematics and computer programming because they allow instructions to be specified in a general way.
		Usually, a variable is set to reside in some scope in program code, and entrance and leave of the scope coincides with the beginning and ending of a variable life, respectively.
	encyclopedia.worldsearch.com /variable.htm (2052 words)

	[Eeglablist] Reading in own channel locations
		Warning: Reference to uninitialized variable eloc in readlocs at line 488.
		Warning: Reference to uninitialized variable eloc in readlocs at line 516.
		Warning: coordinate conversion failed Warning: Reference to uninitialized variable eloc in readlocs at line 532.
	www.sccn.ucsd.edu /pipermail/eeglablist/2004/000288.html (1327 words)

	variable usage warnings -
		Perl6 should distinguish between uses and assignments to variables, and warn only when a variable is used without being assigned, or assigned to without being used.
		It would be more useful to have a complaint for both lexical and package variables, and only when a variable is used without ever being assigned to (or having its reference taken), or assigned to without its value ever being used.
		This message is too close to the existing "use of uninitialized value", but that message is badly phrased anyway, so it will change to "use of undefined value" to better reflect its actual meaning.
	dev.perl.org /perl6/rfc/12.html (352 words)

	Introduction to Variables and Parameters (Site not responding. Last check: 2007-11-06)
		Variables are at the heart of every programming and scripting language.
		A variable is nothing more than a location or set of locations in computer memory that holds an item of data.
		An uninitialized variable has a "null" value - no assigned value at all (not zero!).
	www.signaltonoise.net /library/Adv-Bash-Scr-HOWTO/variables.html (629 words)

	[No title] (Site not responding. Last check: 2007-11-06)
		Use of uninitialized value at /m1/kschenk/public_html/Kiosk/list_rows.pl line 60 (#2) (W) An undefined value was used as if it were already defined.
		Use of uninitialized value at (eval 26) line 27 (#2) [Thu Apr 6 13:48:58 2000] list_rows.pl: Use of uninitialized value at (eval 26) line 27.
		Use of uninitialized value at (eval 26) line 27 (#2) [Thu Apr 6 13:49:11 2000] list_rows.pl: Use of uninitialized value at (eval 26) line 27.
	www.csuchico.edu /~kschenk/Kiosk/kiosk_errors (19068 words)

	Finding Uninitialized variables
		In this example test is uninitialized at the assignment to dummy.If foo is always true the test is always initialized.
		The variable test is initializedin the middle of the loop, therefore one of the two possible flows through that loop,the one where it never executes, does not have test as initialized.
		Passing a variable to a VAR parameter is a way to initializea variable, but there is a possible ambiguity here.
	www.modula2.org /sb/websitearchive/env/index23.htm (644 words)

	Variable Substitution
		Using a variable before assigning a value to it will usually cause problems.
		It is nevertheless possible to perform arithmetic operations on an uninitialized variable.
		echo "$uninitialized" # 5 # Conclusion: # An uninitialized variable has no value, however #+ it acts as if it were 0 in an arithmetic operation.
	www.tldp.org /LDP/abs/html/varsubn.html (545 words)

	[No title]
		The non-transitive model will correctly identify the usage of X as "potentially uninitialized" and thus identify the cause of a potential error, but leave Y, A, and B undiagnosed, since the problem is clearly not at the point of their usages.
		In summary, the diagnostics of uninitialized objects must be conservatively correct, that is, all uninitialized objects will be recognized, but some objects initialized only by alias-effects or uninitialized only on non-executable paths, or assigned the value of an uninitialized object may also be diagnosed as uninitialized.
		The point is to acknowledge that the compiler must identify variables that are not assigned a value, not variables that are uninitialized for more complex reasons.
	www.ada-auth.org /cgi-bin/cvsweb.cgi/AIs/AI-00209.TXT?rev=1.6 (2029 words)

	[No title]
		The macro-operand PTR is a variable of type `char *' which points to the opcode name in its "internal" form--the form that is written in the machine description.
		This macro is useful when various assembler syntaxes share a single file of instruction patterns; by defining this macro differently, you can cause a large class of instructions to be output differently (such as with rearranged operands).
		Naturally, variations in assembler syntax affecting individual insn patterns ought to be handled by writing conditional output routines in those patterns.
	www.mit.edu /afs/sipb.mit.edu/project/bounds/info/gcc.info-24 (6977 words)

	The Meaning of Nothing
		Of these (1) should always work, but (2) might require more effort than you are willing to do (especially if it is system wide) in which case, leave it as it is, but know that it is a bit of a "hack" and find a better solution next time.
		True, in the sense of a variable that points to random memory or points to something that is not an 'object' in a pure OO language.
		So we could call them 'unwanted-initializations' but that is a bit unwieldy, and at the level of proper execution of our program, they are still 'uninitialized': their initial value is just as wrong for correct program execution as if they referred to garbage memory.
	www.chimu.com /publications/short/stNil.html (4110 words)

	Insure++ User's Guide - insight (Site not responding. Last check: 2007-11-06)
		variable and allocate a block of memory of the new size.
		Insight can also detect variables which have no effect on the behavior of your application, either because they are never used, or because they are assigned values which are never used.
		Occasionally, however, an unused variable may be a symptom of a logical program error, so you may wish to enable this checking periodically.
	nimbus.temple.edu /insure/users/insguide.htm (3685 words)

	Purified Tcl Blend
		** Purify instrumented /vol/carson/carson2/cxh/pt/obj.sol2.5/tcltk/tclBlend1.0b1up1/green.pure (pid 15292) UMR: Uninitialized** memory read: * This is occurring while in: Tclblend_Init [javaCmd.c:217] Tcl_AppInit [green.c:102] Tcl_Main [tclMain.c:137] main [green.c:71] _start [crt1.o] * Reading 8 bytes from 0xefffee00 on the stack (4 bytes at 0xefffee04 uninit).
		This warning and many of the other warnings are associated with variables that have the type:
		Here are some tests that work under the vanilla binary, but not the purified version.
	www.cs.berkeley.edu /~cxh/java/purify/purifytclblend.html (1838 words)

	[No title] (Site not responding. Last check: 2007-11-06)
		Similarly, logically, the database class is an extension of the history class, in that it contains a copy of all of the members defined in the latter —the size and contents instance variables, and the addElement(), size(), and elementAt() instance methods.
		This is because, at compile time, we do not know the exact value of a variable, and have to take the conservative approach of assuming it has only those members that are indicated by its type (and no other member).
		Unlike other languages such as C that allow casting, Java keeps the type of a variable at runtime, and will throw an exception if the actual type, T2, does not match the type, T1, given in the cast, that is T2 is not a T1.
	www.cs.unc.edu /~dewan/14OEBook/12Arrays.doc (3783 words)

	uninitialized variable in saveimage() for 'ps' image type (Site not responding. Last check: 2007-11-06)
		uninitialized variable in saveimage() for 'ps' image type
		Prev by Date: uninitialized variable in saveimage() for 'ps' image type
		Previous by thread: uninitialized variable in saveimage() for 'ps' image type
	www.octave.org /octave-lists/archive/bug-octave.1999/msg00185.html (182 words)

	Variable Substitution (Site not responding. Last check: 2007-11-06)
		The only time a variable appears "naked", without the $ prefix, is when declared or assigned, when
		echo echo '$hello' # Variable referencing disabled by single quotes, #+ which causes the "$" to be interpreted literally.
		echo "numbers = $numbers" echo "other_numbers = $other_numbers" echo echo "uninitialized_variable = $uninitialized_variable" # Uninitialized variable has null value (no value at all).
	www.math.uni-bremen.de /techdoc/software1/bash/varsubn.html (448 words)

	Variable Substitution (Site not responding. Last check: 2007-11-06)
		echo '$hello' # Variable referencing disabled by single quotes, # which causes the "$" to be interpreted literally.
		hello= echo "\$hello (unset) = $hello" # Unsetting a variable means setting it to a null value.
		echo "uninitialized variable = $uninitialized_variable" # It still has a null value.
	www.sissa.it /sis/manuals/abs-guide/varsubn.html (396 words)

	Common REXX Pitfalls
		Since REXX provides a "default" value of uninitialized variables which is the (uppercase) name of the variable, the comparison in the above is false ("W" does not equal 42).
		Placing the variable name in parentheses after EXPOSE tells REXX that the variable itself, and all variable names contained in the value should be exposed.
		That is because the variables COUNTRY.TUESDAY and COUNTRY.Tuesday are distinct (though the symbols are not, as far as REXX is concerned).
	cgd.best.vwh.net /rexxpits.htm (5476 words)

	[No title] (Site not responding. Last check: 2007-11-06)
		/* WHI -- uninitialized variables / / Author: Joseph Autin * * Purpose: What happens if...
		* a variable is NOT explicitly initialized, * what default value (if any) is it given by the compiler?
		* * Input: (none) * * Output: display the "current value" of ininitialized * variables (int, float, char, and string) */ #include
	www.uno.edu /~jautin/csci/whi/uninit.c (57 words)

	Using and Porting GNU CC - Uninitialized Data (Site not responding. Last check: 2007-11-06)
		Each of the macros in this section is used to do the whole job of outputting a single uninitialized variable.
		This macro controls how the assembler definitions of uninitialized global variables are output.
		This macro controls how the assembler definitions of uninitialized static variables are output.
	www.psc.edu /general/software/packages/gcc/manual/gcc_210.html (210 words)

	[No title] (Site not responding. Last check: 2007-11-06)
		Date: 2 Aug 2000 Last Modified: 20 Sep 2000 Mailing List: perl6-language@perl.org Number: 12 Version: 3 Status: Developing =head1 ABSTRACT "VARIABLE used only once: possible typo" should be replaced with warnings on uses of uninitialized variables (including lexicals).
		The warning for the use of an unassigned variable should be "use of uninitialized variable C
		If whether a variable is initialized is conditional upon the control flow and thus unknowable at compile time, the warning is "possible use of uninitialized variable C
	dev.perl.org /perl6/rfc/12.pod (321 words)

	php-deluxe.net - encyclopedia - encyclopedia description: WiwiHome
		The drawback of this method was that semantically the whole object was copied when a variable was assigned, or passed as a parameter to a method.
		There is no virtual+table feature in the Engine, so the static variables are bound with a name at compile time instead of with a reference.
		PHP does not enforce the declaration of variables, and variables* that have not been initialized can have operations (such as concatenation) performed on them; however, an operation on an uninitialized variable does raise an E_NOTICE level error, errors that are hidden by default.
	www.php-deluxe.net /wiwimod,index.htm (3066 words)

	Re: [BUGS] PATCH: Uninitialized variable usage in contrib/pg_autovacuum
		Your patch has been added to the PostgreSQL unapplied patches list at: http://momjian.postgresql.org/cgi-bin/pgpatches I will try to apply it within the next 48 hours.
		PATCH: Uninitialized variable usage in contrib/pg_autovacuum, Craig Boston
		Re: [BUGS] PATCH: Uninitialized variable usage in contrib/pg_autovacuum, Bruce Momjian
	www.usenet.com /newsgroups/comp.databases.postgresql.patches/msg00953.html (323 words)

	[Bug tree-optimization/19833] New: bogus uninitialized variable warning
		Test gcc.dg/uninit-4.c has failed on powerpc64-unknown-linux-gnu with -m64 since 2004-12-17 for a bogus uninitialized variable warning.
		This is probably low priority, but I wanted a PR to reference when I mark uninit-4.c XFAIL for { powerpc64--* andand lp64 }.
		[Bug tree-optimization/19833] bogus uninitialized variable warning for powerpc64 pinskia at gcc dot gnu dot org
	www.mail-archive.com /gcc-bugs@gcc.gnu.org/msg101711.html (138 words)

	dBforums - Re: php 5 and uninitialized variables
		> code where a variable is utilized (set/get) but not initialized.
		uninitialized variable useage would cause the problem and not even give an
		that is, if you are trying to assign a post/get variable to a php
	www.dbforums.com /t1081732.html (723 words)

	dBforums - Overhead of Uninitialized Variable Checking
		variables at run-time by adding calls to its own checking routines.
		Lahey compilers that includes run-time uninitialized variable checking.
		I know that checking for uninitialized variables as well as array
	www.dbforums.com /t530051.html (1397 words)

	Test Constructs
		then echo "Uninitialized variable is true." else echo "Uninitialized variable is false." fi # Uninitialized variable is false.
		echo "Testing \"-n \$xyz\"" if [ -n "$xyz" ] then echo "Null variable is true." else echo "Null variable is false." fi # Null variable is false.
		echo echo "Testing \"\$false\"" # Again, uninitialized variable.
	www.tldp.org /LDP/abs/html/testconstructs.html (1097 words)

	LinuxQuestions.org - Test uninitialized variable - where Linux users come for help
		I'm trying to test if a variable has a value but can't get it for some reason...
		When you declare a variable in C (this is C right?) it isn't initialized to anything in particular, it gets whatever happens to be in the memory space it was given.
		If it is a char * then set it equal to NULL (if you plan on dynamically allocating memory) or to an empty string of the correct size (if you are statically allocating memory).
	www.linuxquestions.org /questions/showthread.php?postid=754103 (481 words)

	Bug 1094 - Possible use of uninitialized variable in monitor_2::_dispatch
		Bug 1094 - Possible use of uninitialized variable in monitor_2::_dispatch
		The fix is simple: either set 'entry' to 0 when it is declared or within the catch block.
		This is covered by PEP 183 in r2.5, which proposes to permanently disable monitor_2.
	cvs.rdg.opengroup.org /bugzilla/show_bug.cgi?id=1094 (131 words)

	R devel 1999: Re: modreg buggy: uninitialized variable in siner (Site not responding. Last check: 2007-11-06)
		R devel 1999: Re: modreg buggy: uninitialized variable in siner
		Previous message: thoffman@zappa.sax.de: "modreg buggy: uninitialized variable in sinerp.f (PR#302)"
		Reply: Prof Brian D Ripley: "Re: modreg buggy: uninitialized variable in sinerp.f (PR#302)"
	www.r-project.org /nocvs/mail/r-devel/1999/1104.html (296 words)

	Dreamland: finding the uninitialized variable bug (Site not responding. Last check: 2007-11-06)
		There’s a new programmer who is having a problem with his program, which is crashing.
		I ask him what language it’s in and he says C. We walk along, and I explain how programs can crash in C, by having a pointer variable which is uninitialized.
		So I tell him that and then his supervisor is there going over the code with him, so I go off and do something else.
	www.thedailychannel.com /dreams/sept0999.htm (316 words)

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