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• Strange behaviour of switch case with boolean value

  - by Nikhil Agrawal

  My question is not about how to solve this error(I already solved it) but why is this error with boolean value. My function is private string NumberToString(int number, bool flag) { string str; switch(flag) { case true: str = number.ToString("00"); break; case false: str = number.ToString("0000"); break; } return str; } Error is Use of unassigned local variable 'str'. Bool can only take true or false. So it will populate str in either case. Then why this error? Moreover this error is gone if along with true and false case I add a default case, but still what can a bool hold apart from true and false? Why this strange behaviour with bool variable?

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• Chaining animations and memory management

  - by bryan1967

  Hey Everyone, Got a question. I have a subclassed UIView that is acting as my background where I am scrolling the ground. The code is working really nice and according to the Instrumentation, I am not leaking nor is my created and still living Object allocation growing. I have discovered else where in my application that adding an animation to a UIImageView that is owned by my subclassed UIView seems to bump up my retain count and removing all animations when I am done drops it back down. My question is this, when you add an animation to a layer with a key, I am assuming that if there is already a used animation in that entry position in the backing dictionary that it is released and goes into the autorelease pool? For example: - (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag { NSString *keyValue = [theAnimation valueForKey:@"name"]; if ( [keyValue isEqual:@"step1"] && flag ) { groundImageView2.layer.position = endPos; CABasicAnimation *position = [CABasicAnimation animationWithKeyPath:@"position"]; position.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear]; position.toValue = [NSValue valueWithCGPoint:midEndPos]; position.duration = (kGroundSpeed/3.8); position.fillMode = kCAFillModeForwards; [position setDelegate:self]; [position setRemovedOnCompletion:NO]; [position setValue:@"step2-1" forKey:@"name"]; [groundImageView2.layer addAnimation:position forKey:@"positionAnimation"]; groundImageView1.layer.position = startPos; position = [CABasicAnimation animationWithKeyPath:@"position"]; position.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear]; position.toValue = [NSValue valueWithCGPoint:midStartPos]; position.duration = (kGroundSpeed/3.8); position.fillMode = kCAFillModeForwards; [position setDelegate:self]; [position setRemovedOnCompletion:NO]; [position setValue:@"step2-2" forKey:@"name"]; [groundImageView1.layer addAnimation:position forKey:@"positionAnimation"]; } else if ( [keyValue isEqual:@"step2-2"] && flag ) { groundImageView1.layer.position = midStartPos; CABasicAnimation *position = [CABasicAnimation animationWithKeyPath:@"position"]; position.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear]; position.toValue = [NSValue valueWithCGPoint:endPos]; position.duration = 12; position.fillMode = kCAFillModeForwards; [position setDelegate:self]; [position setRemovedOnCompletion:NO]; [position setValue:@"step1" forKey:@"name"]; [groundImageView1.layer addAnimation:position forKey:@"positionAnimation"]; } } This chains animations infinitely, and as I said one it is running the created and living object allocation doesn't change. I am assuming everytime I add an animation the one that exists in that key position is released. Just wondering I am correct. Also, I am relatively new to Core Animation. I tried to play around with re-using the animations but got a little impatient. Is it possible to reuse animations? Thanks! Bryan

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• Generate EF4 POCO classes first time only

  - by Jaxidian

  The problem I'm having is, using the POCO templates, generating my POCO classes the first time only and not overwriting them when the templates are re-ran. I know this sounds hokey and the reason is that I'm actually changing these templates and trying to generate metadata classes rather than the actual POCO classes, but these metadata classes will be hand-edited and I want to keep those edits in the future but still regenerate a certain amount of it. I have it all working exactly as I want except for the regeneration of the files. I have looked into T4 and it seems that there is a flag to do just this (see the Output.PreserveExistingFile property) but I don't understand where/how to set this flag. If you can tell me where/how to set this in the default POCO templates, then I think that's all I really need. Thanks!! :-)

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• Compile a shared library statically

  - by Simon Walker

  I've got a shared library with some homemade functions, which I compile into my other programs, but I have to link the end program with all the libraries I have used to compile the static library. Here is an example: I have function foo in the library which requires a function from another library libbar.so. In my main program to use function foo I have to compile it with the -lbar flag. Is there a way I can compile my library statically so it includes all the required code from the other libraries, and I can compile my end program without needing the -lbar flag? Cheers

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• Limit the number of cron jobs runnging a PHP script

  - by ed209

  I have a daily cron job that grabs 10 users at a time and does a bunch of stuff with them. There are 1000's of users that are part of that process every day. I don't want the cron jobs to overlap as they are heavy on server load. They call stuff from various APIs so I have timeouts and slow data fetching to contend with. I've tried using a flag to mark a cron job as running, but it's not reliable enough as some PHP scripts may time out or fail in various ways. Is there a good way to stop a cron job from calling the PHP script multiple times, or controlling the number of times it is called, so there are only 3 instances for example? I'd prefer a solution in the PHP if possible. Any ideas? At the moment I'm storing the flag as a value in a database, is using a lock type file any better as in here http://stackoverflow.com/questions/851872/does-a-cron-job-kill-last-cron-execution ?

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• Memory section handling error

  - by Basilevs

  I'm getting a link time error: WARNING: /home/gulevich/development/camac-fedorov/camac/linux/k0607-lsi6/camac-k0607-lsi6.o (.ctors): unexpected non-allocatable section. Did you forget to use "ax"/"aw" in a .S file? Note that for example <linux/init.h> contains section definitions for use in .S files. The code causing the error (assembly in C source): # if defined(__ELF__) # define __SECTION_FLAGS ", \"aw\" , @progbits" /* writable flag needed for ld ".[cd]tors" sections bug workaround) */ # elif defined(__COFF__) # define __SECTION_FLAGS ", \"dr\"" /* untested, may be writable flag needed */ # endif asm ( ".section .ctors" __SECTION_FLAGS "\n" ".globl __ctors_begin__\n" "__ctors_begin__:\n" ".previous\n" ); Is there any way to fix this? The idea is to put a varaible __ctors_begin__ at the beginning of a certain memory section. This code is a legacy that worked fine using a different build system and older compiler. Meaning of this assembly code explained in an answer to my previous question.

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• SQL Server: bcp utility: login fails

  - by Patrick

  Microsoft Windows [Version 5.2.3790] (C) Copyright 1985-2003 Microsoft Corp. C:\Documents and Settings\Administrator>bcp "SELECT TOP 1000 * FROM SOData.dbo.E xperts" queryout c:\customer3.txt -n -t -UAdministrator -P -SDNAWINDEV SQLState = 28000, NativeError = 18456 Error = [Microsoft][SQL Server Native Client 10.0][SQL Server]Login failed for u ser 'Administrator'. or.. without -P flag C:\Documents and Settings\Administrator>bcp "SELECT TOP 1000 * FROM SOData.dbo.E xperts" queryout c:\customer3.txt -n -t -UAdministrator -P -SDNAWINDEV SQLState = 28000, NativeError = 18456 Error = [Microsoft][SQL Server Native Client 10.0][SQL Server]Login failed for u ser 'Administrator'. or, without -P flag, and typing the password.. is the same C:\Documents and Settings\Administrator>bcp "SELECT TOP 1000 * FROM SOData.dbo.E xperts" queryout c:\customer3.txt -n -t -UAdministrator -SDNAWINDEV Password: SQLState = 28000, NativeError = 18456 Error = [Microsoft][SQL Server Native Client 10.0][SQL Server]Login failed for u ser 'Administrator'.

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• PHP code not working on IE

  - by Michael Frey

  I have a website with a flag. If it is clicked, the language of the website changes. Here is the code displaying the flag, which is a form with post event: <?php $pagename = $_SERVER['REQUEST_URI']; echo '<form action="'.$pagename.'" method="post"> <input name="formlanguage" type="image" '; if ($_SESSION['lang'] == 0) { echo 'alt="English" src="images/en.png" value="1" '; } else { echo 'alt="Deutsch" src="images/de.png" value="0" '; } echo '/></form>'; ?> Here is the response to that, and this part always fails on IE: if (isset($_POST['formlanguage'])) { $_SESSION['lang']=$_POST['formlanguage']; } I can not figure out why it works on Chrome but not IE. I assume that it might be a setting of IE. But what could that be?

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• How to display an image when aAsynch post back is happening

  - by Nasser Hajloo

  I have an Ajaxable application which has some UpdateProgress for each postBack events. everything is good and working great. I want to display another Indicator in my SiteMapPath bar which shows a post back is happening no matter what. For example when user clicks on a button an UpdateProgress display an Indicator Image in central part of application. I want to display another image ( for every postbacks not only for one) in top of application toolbar. Currently I use a simple Flag out ther and I want to use an indicator instead of that flag when ever a postback happens Thank you in advance

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• How do I list all non-system stored procedures?

  - by bubbassauro

  I want to create a query to list of all user defined stored procedures, excluding the ones that are system stored procedures, considering that: Checking the name like "sp_" doesn't work because there are user stored procedures that start with "sp_". Checking the property is_ms_shipped doesn't work because there are system stored procedures that have that flag = 0, for example: sp_alterdiagram (it is not MSShipped but appears under System Stored Procedures in SQL Server Management Studio). There must be a property, or a flag somewhere since you can see the "System Stored Procedures" in a separate folder in SQL 2005. Does anyone know? Edit: A combination of the suggestions below worked for me: select * from sys.objects O LEFT OUTER JOIN sys.extended_properties E ON O.object_id = E.major_id WHERE O.name IS NOT NULL AND ISNULL(O.is_ms_shipped, 0) = 0 AND ISNULL(E.name, '') <> 'microsoft_database_tools_support' AND O.type_desc = 'SQL_STORED_PROCEDURE' ORDER BY O.name

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• Discovering maximum packet size

  - by ereOn

  I'm working on a network-related project and I am using DTLS (TLS/UDP) to secure communications. Reading the specifications for DTLS, I've noted that DTLS requires the DF flag (Don't Fragment) to be set. On my local network if I try to send a message bigger than 1500 bytes, nothing is sent. That makes perfect sense. On Windows the sendto() reports a success but nothing is sent. I obviously cannot unset the DF flag manually since it is mandatory for DTLS and i'm not sure whether the 1500 bytes limit (MTU ?) could change in some situations. I guess it can. So, my question is : "Is there a way to discover this limit ?" If not, what would be the lowest possible value ? My software runs under UNIX (Linux/MAC OSX) and Windows OSes so different solutions for each OS are welcome ;) Many thanks.

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• Creating AST for shared and local variables

  - by Rizwan Abbasi

  Here is my grammar grammar simulator; options { language = Java; output = AST; ASTLabelType=CommonTree; } //imaginary tokens tokens{ SHARED; LOCALS; BOOL; RANGE; ARRAY; } parse : declaration+ ; declaration :variables ; variables : locals ; locals : (bool | range | array) ; bool :ID 'in' '[' ID ',' ID ']' ('init' ID)? -> ^(BOOL ID ID ID ID?) ; range : ID 'in' '[' INT '..' INT ']' ('init' INT)? -> ^(RANGE ID INT INT INT?) ; array :ID 'in' 'array' 'of' '[' INT '..' INT ']' ('init' INT)? -> ^(ARRAY ID INT INT INT?) ; ID : (('a'..'z' | 'A'..'Z'|'_')('a'..'z' | 'A'..'Z'|'0'..'9'|'_'))* ; INT : ('0'..'9')+ ; WHITESPACE : ('\t' | ' ' | '\r' | '\n' | '\u000C')+ {$channel = HIDDEN;} ; INPUT flag in [down, up] init down pc in [0..7] init 0 CA in array of [0..5] init 0 AST It is having a small problem. Variables (bool, range or array) can be of two abstract types 1. locals (each object will have it's own variable) 2. shared (think of static in java, same for all object) Now the requirements are changed. I want the user to input like this NEW INPUT domains: upDown [up,down] possibleStates [0-7] booleans [true,false] locals: pc in possibleStates init 0 flag in upDown init down flag1 in upDown init down map in array of booleans init false shared: pcs in possibleStates init 0 flag in upDown init down flag1 in upDown init down maps in array of booleans init false Again, all the variables can be of two types (of any domain sepecified) 1. Local 2. Shared In Domains: upDown [up,down] possibleStates [0-7] upDown, up, down and possibleStates are of type ID (ID is defined in my above grammar), 0 and 7 are of type INT Can any body help me how to convert my current grammar to meet new specifications.

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• MySQL: Get only count of result set.

  - by Varun

  I am using MVC with PHP/MySQL. Suppose I am using 10 functions with different queries for fetching details from the database. But at other times I may want to get only the count of the result that will be returned by the query. What is the standard way to handle such situation. Should I write 10 more functions which duplicate almost whole query and return only the count. Or Should I always return the count also with the result set Or I can pass a flag to indicate that the function should return count only, and then based on the flag I will dynamically generate the (select part of) query. Or Is there a better way?

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• Setting package-wide variables during python setup.py install

  - by Morgoth

  Is there a way that when a user types python setup.py install to install a Python package, setup.py can be made to set specific variables at the base of the pacakge? A common example would be to basically set mypackage.__revision__ to be the svn revision of the checkout if one is working from svn. Another example case would be if the user can choose a global option, so that the option mypackage.__option__ be set according to a flag passed to setup.py, e.g. python setup.py install --set-flag=10 Then when using the package, mypackage.__option__ would equal 10.

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• Converting between unsigned and signed int safely

  - by polemic

  I have an interface between a client and a server where a client sends (1) an unsigned value, and (2) a flag which indicates if value is signed/unsigned. Server would then static cast unsigned value to appropriate type. I later found out that this is implementation defined behavior and I've been reading about it but I couldn't seem to find an appropriate solution that's completely safe? I've read about type punning, pointer conversions, and memcpy. Would simply using a union type work? A UnionType containing signed and unsigned int, along with the signed/unsigned flag. For signed values, client sets the signed part of the union, and server reads the signed part. Same for the unsigned part. Or am I completely misunderstanding something? Side question: how do I know the specific behavior in this case for a specific scenario, e.g. windriver diab on PPC? I'm a bit lost on how to find such documentation.

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• Enable/disable zoom on iPhone safari with Javascript?

  - by msqr

  I have 1 page which has 2 DIV elements which is shown/hidden based on user click on action buttons with javascript, I would like to toggle scaling on action button click. I tried with below javascript and it is changing viewport meta but getting no effect. Any suggestions? Blockquote var ViewPortAllowZoom = 'width=device-width;'; var ViewPortNoZoom = 'width=device-width; initial-scale=1.0; maximum-scale=1.0; minimum-scale=1.0; user-scalable=no;'; function AllowZoom(flag) { if (flag == true) { $('meta[name*=viewport]').attr('content', ViewPortAllowZoom); } else { $('meta[name*=viewport]').attr('content', ViewPortNoZoom); } }

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• Differentiate VMware network adapter from physical network adapters

  - by Venkat

  I have to differentiate between the real addresses and the VM addresses using any Windows API. I'm using Getadaptersaddresses API to populate a list of ipaddresses for the local machine. I need to extract only the "real" addresses apart from the addresses associated with the VMware network adapter and other addresses(auto-configuration and tunnel adapter addresses) I've not been able to find any API or any flag to differentiate this. Is there any way this can be done? PS:The IfType flag in the IP_ADAPTER_ADDRESSES structure returned by Getadaptersaddresses doesn't help me differentiate between VMware addresses and the real addresses

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• How can I test whether a csv file is currently open and being written to - the file, not a file hand

  - by Henry

  I've seen a few questions/answers here that deal with this, but none really give me an answer/solution. I've got a Clipper system writing csv files to a Windows directory. I have a perl script running on a Linux server that is reading a mount of that Windows directory and importing the files to a database. Right now we're using flag files to indicate when a csv is no longer being written to; the flag files gets written after the csv is done. I'd really rather just get what I need from the csv itself, but I can't seem to find a way to tell when the file is open and being written to. lsof doesn't seem to answer my need. I've tried using flock and open the file with an exclusive lock, thinking it might throw an error if the file is being modified, but it doesn't. Any thoughts?

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• Rails - Preventing users from contributing to website when there score is too low - callback / obser

  - by adam

  A User can add a Sentence directly on my website, via twitter or email. To add a sentence they must have a minimum score. If they don't have the minimum score they cant post the sentence and a warning message is either flashed on the website, sent back to them via twitter or email. So I'm wondering how best to code this check. Im thinking a sentence observer. So far my thoughts are in before_create score_sufficient() - score ok = save - score too low = do not save In the case of too low i need to return some flag so that the calling code can then fire off teh relevant warning. What type of flag should I return? False is too ambiguous as that could refer to validation. I could raise an exception but that doesn't sound right or I could return a symbol? Is this even the right approach? What's the best way to code this?

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• file_operations Question, how do i know if a process that opened a file for writing has decided to c

  - by djTeller

  Hi Kernel Gurus, I'm currently writing a simple "multicaster" module. Only one process can open a proc filesystem file for writing, and the rest can open it for reading. To do so i use the inode_operation .permission callback, I check the operation and when i detect someone open a file for writing I set a flag ON. i need a way to detect if a process that opened a file for writing has decided to close the file so i can set the flag OFF, so someone else can open for writing. Currently in case someone is open for writing i save the current-pid of that process and when the .close callback is called I check if that process is the one I saved earlier. Is there a better way to do that? Without saving the pid, perhaps checking the files that the current process has opened and it's permission... Thanks!

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• Detect if PCRE was built without the --enable-unicode-properties or --enable-utf8 configuration switches

  - by Mark Baker

  I've a PHP library that uses a number of regular expressions featuring the \P expressions for multibyte strings, e.g. ((((?:\P{M}\p{M}*)+?)|(\'[^\']*\')|(\"[^\"]*\"))!)?\$?([a-z]{1,3})\$?(\d+) While this works on most builds, I've had a few reports of the regexp returning an error. Depending on Operating platform, the error messages from PCRE are: Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset n or Compilation failed: support for \\P, \\p, and \\X has not been compiled at offset n I know that I can probably test a regexp at the beginning of my code that uses \P, and trap for a returned error, then use that response to set a compatibility flag and provide a degraded (non UTF-8) regexp without the \P within the main body of my code based on that compatibility flag; but I was wondering if there was any simpler way to identify whether PCRE had been built without the --enable-unicode-properties or --enable-utf8 configuration switches. PHP provides access to PCRE_VERSION constant, but that won't help identify whether \P support is enabled or not.

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• NHibernate: Dynamically swapping a single domain model between multiple physical data models

  - by Nigel

  Hi In this article Ayende describes how to map a single domain model to multiple physical data models. Is it possible to extend this principle such that the mapping can chosen dynamically? So for example, imagine we had an entity that could be written to the same physical schema in three ways depending on its current status, and lets assume that regardless of status each entity had a unique identifier. One solution would be to represent the entity in its different states with three separate classes: one for each mapping. Then the entity could be loaded and in order to change its state the entity could be mapped to a class representing one of its other states and then saved back to the schema, making use of a different mapping. I was wondering if it is at all possible to have the same entity represented by one class that held a status flag (kind of like a discriminator), and any save to the schema would choose the appropriate mapping based on the value of the status flag. Hopefully that made sense! Many thanks.

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• How to change code settings in eclipse

  - by Maven

  Sorry if the question title is confusing. Let me explain further. I am building a Java project with Eclipse. In my Java product I have conditionals that determine what code is included in the product and relies on static final constants for dead stripping. class BuildFlags { public static final boolean SOME_FLAG = true; // Need to set this programmatically } class SomeOtherClass { public void someMethod() { if (BuildFlags.SOME_FLAG) { // flag specific code } } } My question is how can I change BuildFlags.SOME_FLAG (above) so that I can run a special build without changing the source? Is there some way I can pass flags to the jvm (from eclipse) which I can then access to set this flag programatically?

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• Listen to HTML/CSS events of web page

  - by David Metcalfe

  I'm looking for a way to listen for an event in the HTML/CSS of a webpage. Basically, a website I use at work lists queues and appointments, which flag as yellow/red based on the amount of time late on taking said appointment. Other than this visual aide, there is no alert of any kind, which is a failing point if one is juggling multiple windows and doesn't notice. What I would like to do is put together a simple way to watch for the tag ID or perhaps the flag hex color, and then alert me in a way of my choosing. The work environment is on OS X, so I presume I'm looking at an Objective-C centric solution unless Applescript is capable of doing this. Any help would be greatly appreciated.

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• Alert is showing two times. how to restrict?

  - by Dev

  function test(myObject, flag) { if ( (flag) || ((event.keyCode == 59) || (event.which == 59)) || ((event.keyCode == 44) || (event.which == 44))) {alert(myObject.value);} } function closeWin() {self.close();} --foaram name='test' --textaarea name='textareaName' cols='44' rows='3' onChange='test(this, true);' --onKeyPress='test(this);' onBlur='test(this, true);' ---inpaut type='text' name='textName' --inpaut type='button' name='buttonName' onclick='closeWin();' value='Cancel' --/foarm I have a problem: when input value(e.g: test;) into textareaName field, the test function is always run more one time. Please show me the way can run this only one time.

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