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• Entering Complex Data into Access

  - by DataMakesMeCrazy

  Fairly new to Access and trying to do something that seems simple, but may be very complex. I want to create a database of projects, each project has several phases (ie proposal, marketing, etc) and that will allow for multiple employees to work on a single project. Ie Bob and John are working on project number 102. From here, i would like to enter the forecasted start and end dates for each phase of the project, and enter the forecasted number our hours each employee will be allowed to work on that phase of that project ie. Project - Employee - Phase - Start - End - (list weeks) 102 - Bob - Marketing - 12-May-10 - 21-May-10 - 3 - 5 (3 hours first week, 5 hours the second) and so on Basically would all this data be on one table, or several? And can access dynamically show the weeks between the start and end date so that i can input the hours? I feel this database will become severely complicated :S Thanks, J

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• Bring another processes Window to foreground when it has ShowInTaskbar = false

  - by Mongus Pong

  We only want one instance of our app running at any one time. So on start up it looks to see if the app is running and if it is, it calls SetForegroundWindow on the Main Window. This is all good and well ... for the most part.. When our app starts up it will show a Splash screen and a Logon form. Both of these forms have ShowInTaskBar = false. Because of this, if you try to start up another copy of the app when the Logon form is showing, that Logon form is not brought to the front! Especially as the user cant see anything in the taskbar as well, all they figure is that the app is duff and cannot start. There is no indication that there is another instance running. Is there any way around this problem?

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• parsing through html with php

  - by salmane

  while working on facebook connect I have to retrieve an access token from a url ( it is not in the url itself but in the file lined to that url) so this is what I do $url = "https://graph.facebook.com/oauth/access_token?client_id=".$facebook_app_id."&redirect_uri=http://www.example.com/facebook/oauth/&client_secret=".$facebook_secret."&code=".$code;" function get_string_between($string, $start, $end){ $string = " ".$string; $ini = strpos($string,$start); if ($ini == 0) return ""; $ini += strlen($start); $len = strpos($string,$end,$ini) - $ini; return substr($string,$ini,$len); } $access_token = get_string_between(file_get_contents($url), "access_token=", "&expires="); it looks ugly and clumsy is there a better way to do it ? thank you .

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• API verbs for an interruptible operation

  - by 280Z28

  I have a long running task as part of my application. The task can be started, paused, resumed, and cancelled. I'm trying to find the best interface for these operations. Two seem clear: Pause and Cancel. This leaves the start and resume operations. I could include both Start and Resume. This has the downside of either requiring the API consumer to check the state before starting/resuming the operation to call the right method, or making the methods aliases of each other. I'm thinking I should include either Start or Resume, but I don't know which one is the most appropriate. Does anyone have any examples in the .NET Framework of such behavior? I prefer to follow established patterns whenever they are available.

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• Java Newbie can't do simple Math, operator error

  - by elguapo-85

  Trying to do some really basic math here, but my lack of understanding of Java is causing some problems for me. double[][] handProbability = new double[][] {{0,0,0},{0,0,0},{0,0,0}}; double[] handProbabilityTotal = new double[] {0,0,0}; double positivePot = 0; double negativePot = 0; int localAhead = 0; int localTied = 1; int localBehind = 2; //do some stuff that adds values to handProbability and handProbabilityTotal positivePot = (handProbability[localBehind][localAhead] + (handProbability[localBehind][localTied] / 2.0) + (handProbability[localTied][localAhead] / 2.0) ) / (handProbabilityTotal[localBehind] + (handProbability[localTied] / 2.0)); negativePot = (handProbability[localAhead][localBehind] + (handProbability[localAhead][localTied] / 2.0) + (handProbability[localTied][localBehind] / 2.0) ) / (handProbabilityTotal[localAhead] + (handProbabilityTotal[localTied] / 2.0)); The last two lines are giving me problems (sorry for their lengthiness). Compiler Errors: src/MyPokerClient/MyPokerClient.java:180: operator / cannot be applied to double[],double positivePot = ( handProbability[localBehind][localAhead] + (handProbability[localBehind][localTied] / 2.0) + (handProbability[localTied][localAhead] / 2.0) ) / (handProbabilityTotal[localBehind] + (handProbability[localTied] / 2.0) ); ^ src/MyPokerClient/MyPokerClient.java:180: operator + cannot be applied to double, positivePot = ( handProbability[localBehind][localAhead] + (handProbability[localBehind][localTied] / 2.0) + (handProbability[localTied][localAhead] / 2.0) ) / (handProbabilityTotal[localBehind] + (handProbability[localTied] / 2.0) ); ^ src/MyPokerClient/MyPokerClient.java:180: operator / cannot be applied to double, positivePot = ( handProbability[localBehind][localAhead] + (handProbability[localBehind][localTied] / 2.0) + (handProbability[localTied][localAhead] / 2.0) ) / (handProbabilityTotal[localBehind] + (handProbability[localTied] / 2.0) ); Not really sure what the problem is. You shouldn't need anything special for basic math, right?

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• How to double the size of 8x8 Grid whilst keeping the relative position of certain tiles intact?

  - by ke3pup

  Hi guys I have grid size of size 8x8 , total of 64 Tiles. i'm using this Grid to implement java search algorithms such as BFS and DFS. The Grid has given forbidden Tiles (meaning they can't be traversed or be neighbour of any other tile) and Goal and Start tile. for example Tile 19,20,21,22 and 35, 39 are forbidden and 14 an 43 are the Goal and start node when the program runs. My question is , How can i double the size of the grid, to 16x16 whilst keeping the Relative position of forbidden tiles as well as the Relative position of start and goal Tiles intact? On paper i know i can do this by adding 4 rows and columns to all size but in coding terms i don't know how to make it work? Can someone please give any sort of hints?

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• Using a variable in a mysql query, in a C++ MFC program.

  - by D.Gaughan

  Hi, after extensive trawling of the internet I still havent found any solution for this problem. I`m writing a small C++ app that connects to an online database and outputs the data in a listbox. I need to enable a search function using an edit box, but I cant get the query to work while using a variable. My code is: res = mysql_perform_query (conn, "select distinct artist from Artists"); //res = mysql_perform_query (conn, "select album from Artists where artist = ' ' "); while((row = mysql_fetch_row(res)) != NULL){ CString str; UpdateData(); str = ("%s\n", row[0]); UpdateData(FALSE); m_list_control.AddString(str); } the first "res = " line is working fine, but I need the second one to work. I have a member variable m_search_edit set up for the edit box, but any way I try to include it in the sql statement causes errors. eg. res = mysql_perform_query (conn, "select album from Artists where artist = '"+m_search_edit+" ' "); causes this error: error C2664: 'mysql_perform_query' : cannot convert parameter 2 from 'class CString' to 'char *' No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called" And when I convert m_search_edit to a char* it gives me a " Cannot add 2 pointers" error. Any way around this???

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• How to differentiate between exceptions i can show the user, and ones i can't?

  - by Ian Boyd

  i have some business logic that traps some logically invalid situations, e.g. trying to reverse a transaction that was already reversed. In this case the correct action is to inform the user: Transaction already reversed or Cannot reverse a reversing transaction or You do not have permission to reverse transactions or This transaction is on a session that has already been closed or This transaction is too old to be reversed The question is, how do i communicate these exceptional cases back to the calling code, so they can show the user? Do i create a separate exception for each case: catch (ETransactionAlreadyReversedException) MessageBox.Show('Transaction already reversed') catch (EReversingAReversingTransactionException) MessageBox.Show('Cannot reverse a reversing transaction') catch (ENoPermissionToReverseTranasctionException) MessageBox.Show('You do not have permission to reverse transactions') catch (ECannotReverseTransactionOnAlredyClosedSessionException) MessageBox.Show('This transaction is on a session that has already been closed') catch (ECannotReverseTooOldTransactionException) MessageBox.Show('This transaction is too old to be reversed') Downside for this is that when there's a new logical case to show the user: Tranasctions created by NSL cannot be reversed i don't simply show the user a message, and instead it leaks out as an unhandled excpetion, when really it should be handled with another MessageBox. The alternative is to create a single exception class: `EReverseTransactionException` With the understanding that any exception of this type is a logical check, that should be handled with a message box: catch (EReverseTransactionException) But it's still understood that any other exceptions, ones that involve, for example, an memory ECC parity error, continue unhandled. In other words, i don't convert all errors that can be thrown by the ReverseTransaction() method into EReverseTransactionException, only ones that are logically invalid cause of the user.

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• Hosting an NServiceBus subscriber in the same application as the producer.

  - by Jack Ryan

  Is it possible to use NServiceBus to publish and consume messages in the same application, specifically a web application? In the future we will almost certainly need to maintain a separate long running service to process messages generated by this application, and this is why we are hoping to use NServiceBus from the start, but right now it would be nice to just start up the consumer and the publisher when the web application starts. This will make testing and deployment far easier for us. I presume I will need to reference the NServiceBus.Host.exe and start up the process in the global.asax, but need help on what exactly I need to call to do this.

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• Java ME Application running fine in Emulator but crashing when deployed to N70. Any way to identify

  - by sana

  I have developed a Java ME application for CLDC platform. It works fine when executed in an emulator. But when i deploy it to my N70 phone the application doesn't start at all in the phone. In my application there are some 14 classes and am creating an instance of each and putting them in the vector on application start. The classes just have one variable and 2 methods. Can this creating of lot of instances be the reason for its crashing? Is there any way I can find out the reason why the application is not able to start in the phone?

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• PHP Sessions Error

  - by Andrei Korchagin

  I'm new to PHP sessions and I've come across the following error: Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at somefile:someline). As well as this one: Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent by (output started at somefile:someline). The session_start(); is the very first thing in all of my code. I'm not sure what the problem is. It gave me line numbers but all I do on those lines is start the session. Also - I have a portion of code whose POST action is another PHP page. How can I set a $_SESSION variable pertaining to this page within that action page?

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• When is it safe to use a broken hash function?

  - by The Rook

  It is trivial to use a secure hash function like SHA256 and continuing to use md5 is reckless behavior. However, there are some complexities to hash function vulnerabilities that I would like to better understand. Collisions have been generated for md4 and md5. According to NIST md5() is not a secure hash function. It only takes 2^39th operations to generate a collision and should never be used for passwords. However SHA1 is vulnerable to a similar collision attack in which a collision can be found in 2^69 operations, where as brute force is 2^80th. No one has generated a sha1 collision and NIST still lists sha1 as a secure message digest function. So when is it safe to use a broken hash function? Even though a function is broken it can still be "big enough". According to Schneier a hash function vulnerable to a collsion attack can still be used as an HMAC. I believe this is because the security of an HMAC is Dependant on its secret key and a collision cannot be found until this key is obtained. Once you have the key used in a HMAC its already broken, so its a moot point. What hash function vulnerabilities would undermine the security of an HMAC? Lets take this property a bit further. Does it then become safe to use a very weak message digest like md4 for passwords if a salt is perpended to the password? Keep in mind the md4 and md5 attacks are prefixing attacks, and if a salt is perpended then an attacker cannot control the prefix of the message. If the salt is truly a secret, and isn't known to the attacker, then does it matter if its a appended to the end of the password? Is it safe to assume that an attacker cannot generate a collision until the entire message has been obtained? Do you know of other cases where a broken hash function can be used in a security context without introducing a vulnerability? (Please post supporting evidence because it is awesome!)

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• Strange problem on some client's browsers

  - by Gustavo Cardoso

  We are fighting a strange problem on the company that I work. We created a site of a promotion to a client where its consumers can register products barcodes to win prizes. The site was created using PHP and MySQL. The site uses SSL on every form. However, some consumers report to the client's call-center they was no able make a registration at the site. We try everything, but we cannot, by no ways, reproduce the problem. The consumers reported the problem on several browsers ranging from IE8 to Firefox, the problem is same on everyone them. One co-woker this weekend was able to catch this same bug on his wife's notebook and brought her computer to the company so we could test. However, here on the company the problem didn't happened and we can make the registration normally. We suppose this problem could be a matter of encoding and special characteres like ã and ç. But we are sure that all source files are UTF8- with BOM. We also suspect of MSXml version, but we are note sure anymore. Because of legal impediments the client cannot ask the consumers to install anything on they computers to test or fix the problem. Sorry but by complience rules we also cannot share the url of the site, what is a pity. I know it is too much on vacuun, but perhaps you could had crossed something similar. Thank you

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• Return a Const Char* by reading an @property NSString in separate class

  - by Andrew

  I'm probably being an idiot here, but I cannot for the life of me find the answer that I'm looking for. I have an array of CalEvents returned from a CalendarStore query, and for other reasons I am finding the first location of any upcoming event for today that is not an all-day or multi-day event. +(const char*) suggestFirstiCalLocation{ CalCalendarStore *store = [CalCalendarStore defaultCalendarStore]; NSPredicate *allEventsPredicate = [CalCalendarStore eventPredicateWithStartDate:[NSDate date] endDate:[[NSDate date] initWithTimeIntervalSinceNow:3600] calendars:[store calendars]]; NSArray *currentEventCalendarArray = [store eventsWithPredicate:allEventsPredicate]; for (int i = 0; i< [currentEventCalendarArray count]; i++){ if (![[currentEventCalendarArray objectAtIndex:i] isAllDay]){ //Now that other events are cleared, check for multi-day NSDate *startOnDate = [[currentEventCalendarArray objectAtIndex:i] startDate]; NSDate *endOnDate = [[currentEventCalendarArray objectAtIndex:i] endDate]; if ([endOnDate timeIntervalSinceDate:startOnDate ] < 86400.0){ NSString * iCalLocation = [[currentEventCalendarArray objectAtIndex:i] location]; return [iCalLocation UTF8String]; } } } return ""; } For other reasons, I am returning a const char with the value of the location that is found. However, I cannot seem to return "iCalLocation" at all. The compiler fails on the line where I am initializing the "iCalLocation" variable: "Cannot convert to pointer type" Being frank: I am new to Objective-C, and I am still trying to figure points, properties, and such out.

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• Interaction between for loops with clock function?!

  - by learningtolive

  Can someone explain me the exact interaction in context of delay between the two for loops with clock function. How does for1 interact with for2 on the cout statement(30 on 640000000)? start=clock(); cout<<endl<<start<<endl; for(delay=0; delay<30; delay++) for(i=0; i<640000000; i++); end=clock(); cout<<end<<endl; cout<<"Num of ticks for non reg-loop: "; cout<<end-start<<'\n';

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• TcpListener problem - re-binding to same port with different local addresses

  - by Zvika

  I'm trying to do the following: listen on some port for loopback connections only, and then start listening on any IP address. Here is the code: TcpListener l1 = new TcpListener(new IPEndPoint(IPAddress.Loopback, 12345)); l1.Start(); Socket s = l1.AcceptSocket(); Console.ReadKey(); //s.Close(); l1.Stop(); TcpListener l2 = new TcpListener(new IPEndPoint(IPAddress.Any, 12345)); l2.Start(); l2.AcceptSocket(); Console.ReadKey(); The problem is that if a client connects while listening on the Loopback address (l1), then no other client can connect to the Loopback address when the second listener (l2) starts listening. why is that? Another thing I noticed is that if I close all clients that connected to l1 (the remarked line), then l2 does accept loopback connections. Any ideas?

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• Android animation doesn't work, probably some kind of screen redraw problem.

  - by BenIOs

  I have created a custom component in my program by extending a ViewGroup. This component listens to touch events and are supposed to start animations when the user has move their finger past some certain points. I'm able to start animations while the user is touching the screen. But I'm not able to start animations if the user doesn't move their finger. It's probably that the phone thinks it doesn't have to update the screen if the user isn't moving their finger. I added some logs and according to them the animation starts and ends but it doesn't draw on the screen. I have the same problems when starting an animation with a timer. I use AlphaAnimations and TranslateAnimations on ImageViews. I have tried to use invalidate() both on the component and the ImageView but it doesn't help. Anyone who has an idea how to solve this?

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• why C clock() returns 0

  - by eddy ed

  I've got something like this: clock_t start, end; start=clock(); something_else(); end=clock(); printf("\nClock cycles are: %d - %d\n",start,end); and I always get as an output "Clock cycles are: 0 - 0" Any idea why this happens? (Just to give little detail, the something_else() function performs a left-to-right exponentiation using montgomery represantation, moreover I don't know for certain that the something_else() function does indeed take some not negligible time.) This is on Linux. The result of uname -a is: Linux snowy.*****.ac.uk 2.6.32-71.el6.x86_64 #1 SMP Fri May 20 03:51:51 BST 2011 x86_64 x86_64 x86_64 GNU/Linux

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• SharePoint - Auto-increment dates in new records?

  - by ACal

  Hello, I have a list that's going to be updated with relatively static data weekly, and I wanted to create a workflow to do this automatically. The only field I'm having trouble with is Start Date. I want the new Start Date to be exactly one week after the previous week's (row's) Start Date, but I can't figure out how to capture this. I can't seem to find an easy way to get the value of the previous row. Now, theoretically, I could just have the workflow run once a week on a given day and use [Today] as the value for the field; however, a requirement is that the list can be populated a few weeks in advance if needed. Thanks in advance for any help you can provide!

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• Combining two exe files

  - by Sophia

  Here's some background to my problem: I have a project in Visual C++ 2006 and a project in in Visual C++ 2010 Express. Both compiles to form an exe file each. I cannot convert my 2006 project to 2010 because I get a lot of "unable to load project" errors. I also cannot port my 2010 project code to 2006 (I always get errors no matter what I try, something to do with libraries). My final solution requires me to only have ONE executable. Is there anything I can do to achieve that? I've done some quick search on Google and found there to be exe joiners, but I've also heard that those things are often used to make malware. For reference, I am working with "dummy" clients, and therefore want to simplify things on their end as much as possible. Thus, having them executing one exe is better than having them execute two. Also, I do not wish for their antivirus to go haywire because I used some program to join two exe together. What do? Edit: The two project files do different things. For example, the project in VS2006 one sets up a server, and the project in VS2010 one grabs info on the user's OS. The code for the "server", I think, has a lot of dependencies and for some reason cannot convert to Visual c++ 2010. The code for "grabbing" requires some newer libraries and compiling options, and would not work if I port to 2006.

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• c++ thread running time

  - by chnet

  I want to know whether I can calculate the running time for each thread. I implement a multithread program in C++ using pthread. As we know, each thread will compete the CPU. Can I use clock() function to calculate the actual number of CPU clocks each thread consumes? my program looks like: Class Thread () { Start(); Run(); Computing(); }; Start() is to start multiple threads. Then each thread will run Computing function to do something. My question is how I can calculate the running time of each thread for Computing function

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• c++ inheritance

  - by Meloun

  Hi, i am trouble with this.. Is there some solution or i have to keep exactly class types? //header file Class Car { public: Car(); virtual ~Car(); }; class Bmw:Car { public: Bmw(); virtual ~Bmw(); }; void Start(Car& mycar) {}; //cpp file Car::Car(){} Car::~Car() {} Bmw::Bmw() :Car::Car(){} Bmw::~Bmw() {} int main() { Car myCar; Bmw myBmw; Start(myCar); //works Start(myBmw); //!! doesnt work return 0; }

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• How to create issue dependencies/links in Jira (3.13) ?

  - by zarko.susnjar

  Hi, We recently switched from other bug tracking software to Jira (3.13 currently ). We need to set issue linking in a manner that my task start time depends on other colleague's issue and I can not start until he resolves his issue... I goolged and found that this kind of thing is integrated in newer versions :/ Maybe we need some plugin, make some custom field, enable something in administration part... Any help would be appreciated... (please retag/add jira and bug-tracking tags or whatever)

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• Which free tool for Windows can save the preferred positions of GUI apps?

  - by Fantomas

  Hi, I am running Windows Server 2008 R2 and I am looking for a free tool. I start a number of batch jobs running inside command prompt. I want to shrink them significantly, so that I can see the Window titles only. I usually shrink them by hand and move them to another monitor. I am looking for a tool that can do that work for me as soon as certain apps start up. Thanks!

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• Stopping and Starting Apache Using PHP (!)

  - by Abs

  Hello all, I have two problems which are related. 1) I have a batch file that contains this: net stop wampapache net start wampapache Which tries to stop and start my wamp server. When I double click the stop.bat file with the above it works successfully. When I try to run that from my PHP script, it stops the server but doesn't start it fully which I am guessing is because Apache is waiting for that PHP process to exit? function php_kill(){ exec('stop.bat', $output = array(), $return); return $return; } 2) Is there a way to restart my webserver (apache) whilst keeping session variables that PHP needs available? Thanks all

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