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  • how to find difference between two timestamp using hibernate query language

    - by Shekhar
    Hello I am trying to write an hql query which gives me the number of hours between two timestamp. So, far i am unable to do this. I have used hql hour function but that does not work if the timestamp corresponds to different date. Please provide any input. My hql query is select count(*) from com.xxx.Request as request where request.id = :id and hour(current_timestamp - request.lastEventDate) :delay Thanks Shekhar

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  • I need to calculate the date / time difference between one date time column

    - by Stringz
    Details. I have the notes table having the following columns. ID - INT(3) Date - DateTime Note - VARCHAR(100) Tile - Varchar(100) UserName - Varchar(100) Now this table will be having NOTES along with the Titles entered by UserName on the specified date / time. I need to calculate the DateTimeDifference between the TWO ROWS in the SAME COLUMN For example the above table has this peice of information in the table. 64, '2010-03-26 18:16:13', 'Action History', 'sending to Level 2.', 'Salman Khwaja' 65, '2010-03-26 18:19:48', 'Assigned By', 'This is note one for the assignment of RF.', 'Salman Khwaja' 66, '2010-03-27 19:19:48', 'Assigned By', 'This is note one for the assignment of CRF.', 'Salman Khwaja' Now I need to have the following resultset in query reports using MYSQL. TASK - TIME Taken ACTION History - 2010-03-26 18:16:13 Assigned By - 00:03:35 Assigned By - 25:00:00 More smarter approach would be TASK - TIME Taken ACTION History - 2010-03-26 18:16:13 Assigned By - 3 minutes 35 seconds Assigned By - 1 day, 1 hour. I would appreciate if one could give me the PLAIN QUERY along with PHP code to embed it too.

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  • Is there a difference between only <NSXMLParserDelegate>, only setDelegate method, or the use of bot

    - by gotye
    Hey, I noticed that when I do this : [myParser setDelegate:self]; it works :D (even if I didn't add the code in the header file ... you know, the <delegateStuff, delegateOtherStuff> in the interface declaration) When are you supposed to modify the header file to make your delegate work ? Is the setDelegate method enough to make it work ? Cheers for any help ;) Gauthier

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  • Difference between an LL and Recursive Descent parser?

    - by Noldorin
    I've recently being trying to teach myself how parsers (for languages/context-free grammars) work, and most of it seems to be making sense, except for one thing. I'm focusing my attention in particular on LL(k) grammars, for which the two main algorithms seem to be the LL parser (using stack/parse table) and the Recursive Descent parser (simply using recursion). As far as I can see, the recursive descent algorithm works on all LL(k) grammars and possibly more, whereas an LL parser works on all LL(k) grammars. A recursive descent parser is clearly much simpler than an LL parser to implement, however (just as an LL one is simply than an LR one). So my question is, what are the advantages/problems one might encounter when using either of the algorithms? Why might one ever pick LL over recursive descent, given that it works on the same set of grammars and is trickier to implement? Hopefully this question makes some amount of sense. Sorry if it doesn't - I blame my the fact that this entire subject is almost entirely new to me.

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  • python modules difference: .c/.h vs. .py

    - by bijan
    I'm very new to python, as i'm embedding it (in form of a static lib) in an ios project. It's not possible for me to dynamically load python modules, so i would like to compile my modules along with python. For modules shipped with the python source this works (by modifying setup.py or Module/Setup), but when i downloaded a third party module i noticed, i don't fully understand the mechanism. The modules shipped with python come with a .c file in the Modules dir as well as a .py file in the Lib dir. My third party module just comes with .py files. 1.Why do those modules have different file extensions? 2.How to integrate a module coming with .py files in an embedded python version? Obviously pasting them in Modules/Setup does require some .c files. 3.Do these .c files have something to do with the Python C-Api? I guess i'm missing something essential :) Help is much appreciated.

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  • Difference in output from use of synchronized keyword and join()

    - by user2964080
    I have 2 classes, public class Account { private int balance = 50; public int getBalance() { return balance; } public void withdraw(int amt){ this.balance -= amt; } } and public class DangerousAccount implements Runnable{ private Account acct = new Account(); public static void main(String[] args) throws InterruptedException{ DangerousAccount target = new DangerousAccount(); Thread t1 = new Thread(target); Thread t2 = new Thread(target); t1.setName("Ravi"); t2.setName("Prakash"); t1.start(); /* #1 t1.join(); */ t2.start(); } public void run(){ for(int i=0; i<5; i++){ makeWithdrawl(10); if(acct.getBalance() < 0) System.out.println("Account Overdrawn"); } } public void makeWithdrawl(int amt){ if(acct.getBalance() >= amt){ System.out.println(Thread.currentThread().getName() + " is going to withdraw"); try{ Thread.sleep(500); }catch(InterruptedException e){ e.printStackTrace(); } acct.withdraw(amt); System.out.println(Thread.currentThread().getName() + " has finished the withdrawl"); }else{ System.out.println("Not Enough Money For " + Thread.currentThread().getName() + " to withdraw"); } } } I tried adding synchronized keyword in makeWithdrawl method public synchronized void makeWithdrawl(int amt){ and I keep getting this output as many times I try Ravi is going to withdraw Ravi has finished the withdrawl Ravi is going to withdraw Ravi has finished the withdrawl Ravi is going to withdraw Ravi has finished the withdrawl Ravi is going to withdraw Ravi has finished the withdrawl Ravi is going to withdraw Ravi has finished the withdrawl Not Enough Money For Prakash to withdraw Not Enough Money For Prakash to withdraw Not Enough Money For Prakash to withdraw Not Enough Money For Prakash to withdraw Not Enough Money For Prakash to withdraw This shows that only Thread t1 is working... If I un-comment the the line saying t1.join(); I get the same output. So how does synchronized differ from join() ? If I don't use synchronize keyword or join() I get various outputs like Ravi is going to withdraw Prakash is going to withdraw Prakash has finished the withdrawl Ravi has finished the withdrawl Prakash is going to withdraw Ravi is going to withdraw Prakash has finished the withdrawl Ravi has finished the withdrawl Prakash is going to withdraw Ravi is going to withdraw Prakash has finished the withdrawl Ravi has finished the withdrawl Account Overdrawn Account Overdrawn Not Enough Money For Ravi to withdraw Account Overdrawn Not Enough Money For Prakash to withdraw Account Overdrawn Not Enough Money For Ravi to withdraw Account Overdrawn Not Enough Money For Prakash to withdraw Account Overdrawn So how does the output from synchronized differ from join() ?

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  • The patent difference between software and other technologies

    - by hstoerr
    Now and then someone makes a weird argument for software patents. What are the best reasons against software patents? What are the best replies for commonly heard arguments of patent proponents? See also the converse question of the dark side. :-) If you are for patents you might want to answer there to keep the stackoverflow philosophy of answers instead of discussions.

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  • what is the difference between declarative and imperative programming

    - by Brad
    I have been searching the web looking for a definition for declarative and imperative programming that would shed some light for me. However the language used at some of the resources that I have found is daunting - for instance at wikipedia. Does any one have a real world example that they could show me that might bring some perspective to this subject...perhaps in c# thanks

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  • The difference between traditional DLL and COM DLL.

    - by smwikipedia
    I am currently studying COM. I found that COM DLL is kind of built upon the traditional DLL infrastructure. When we build COM DLLs, we still rely on the traditional DLL export methods to lead us to the internal COM co-classes. If COM is for component reusing at the binary level, I think the traditional DLL can achieve the same thing. They both expose functions, they are both binary, so what's the point of turning to COM approach? Currently, I have the feeling that the traditional DLL expose methods in a "flat" manner, while the COM DLL expose methods in an "OOP" hierarchy manner. And the OOP manner seems to be a better approach. Could this be the reason why COM prevails? Many thanks.

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  • Adding time zone hours difference to time

    - by Hwang
    I know there's a much better and correct way to do it, but i need a temporarily solutions. I need to add in extra hours to the time, and the day will change automatically too. How should I change the code below? package { public class getTime { private var today:Date=new Date(); private var hour:uint=today.getHours(); private var minute:uint=today.getMinutes(); private var month:uint=today.getMonth(); private var monthArray:Array=new Array('January','February','March','April','May','June','July','August','September','October','November','December'); private var time:String = getUSClockTime(today.getHours(), today.getMinutes()); public var dateNtime:String=(time+", " +today.getDate()+" "+monthArray[month]+" "+today.getFullYear());; public function getTime() { } private function getUSClockTime(hrs:uint, mins:uint):String { var modifier:String="PM"; var minLabel:String=doubleDigitFormat(mins); if (hrs>12) { hrs=hrs-12; } else if (hrs == 0) { modifier="AM"; hrs=12; } else if (hrs < 12) { modifier="AM"; } return (doubleDigitFormat(hrs) + ":" + minLabel + " " + modifier); } private function doubleDigitFormat(num):String { if (num<10) { return ("0" + num); } return num; } } }

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  • Difference between "traditional" COM and COM+ (in Component Services)

    - by kizzx2
    By the "traditional" way I mean registering the DLL in registry. There seems to be another method to set up it by going to mmc-Component Services-COM+ Applications and adding the .tlb file. I have a COM library that supports both methods. When it installs, it registers itself in the registry as a COM component and it works fine. However, when I added the .tlb file using the Component Services method, the behavior seems to be different and it starts giving out errors. I suspect it has something to do with marshaling and inter-process object transfer? (Sorry, I'm really a noob in the COM area) Can anyone point me to a good resource to clear my understanding?

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  • B- trees, B+ trees difference

    - by dta
    In a B- tree you can store both keys and data in the internal/leaf nodes. But in a B+ tree you have to store the data in the leaf nodes only. Is there any advantage of doing the above in a B+ tree? Why not use B- trees instead of B+ trees everywhere? As intuitively they seem much faster. I mean why do you need to replicate the key(data) in a B+ tree?

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  • T-SQL String Functions: difference between using Left/Right and Substring and strange behaviour

    - by TheObserver
    I am using SQL Server 2008 & 2005 (Express). I'm trying to extract part of an alpha numeric string from a varchar field. RIGHT(str_field,3) yields null values but substring(str_field, len(str_field)-2, len(str_field)) gives the right value. left(str_field,7) gives the expected values. What gives? I would have thought that RIGHT(str_field,3) and substring(str_field, len(str_field)-2, len(str_field)) are equivalent expressions.

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  • DDD and MVC: Difference between 'Model' and 'Entity'

    - by Nathan Loding
    I'm seriously confused about the concept of the 'Model' in MVC. Most frameworks that exist today put the Model between the Controller and the database, and the Model almost acts like a database abstraction layer. The concept of 'Fat Model Skinny Controller' is lost as the Controller starts doing more and more logic. In DDD, there is also the concept of a Domain Entity, which has a unique identity to it. As I understand it, a user is a good example of an Entity (unique userid, for instance). The Entity has a life-cycle -- it's values can change throughout the course of the action -- and then it's saved or discarded. The Entity I describe above is what I thought Model was supposed to be in MVC? How off-base am I? To clutter things more, you throw in other patterns, such as the Repository pattern (maybe putting a Service in there). It's pretty clear how the Repository would interact with an Entity -- how does it with a Model? Controllers can have multiple Models, which makes it seem like a Model is less a "database table" than it is a unique Entity. So, in very rough terms, which is better? No "Model" really ... class MyController { public function index() { $repo = new PostRepository(); $posts = $repo->findAllByDateRange('within 30 days'); foreach($posts as $post) { echo $post->Author; } } } Or this, which has a Model as the DAO? class MyController { public function index() { $model = new PostModel(); // maybe this returns a PostRepository? $posts = $model->findAllByDateRange('within 30 days'); while($posts->getNext()) { echo $posts->Post->Author; } } } Both those examples didn't even do what I was describing above. I'm clearly lost. Any input?

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  • UITableView performance difference between Iphone 3G and 3GS ?

    - by gotye
    Hey guys, I managed to put my new app on an adhoc distribution but I just noticed that I only have 3GS's ... It is working quite good on the 3GS (could be a bit faster but that's fine) ... but do you think I should test it on the 3G ? I know there has been a lot of improvements between 3G and 3GS but would that infer on my uitableview performance ? Thanks, Gotye.

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  • Difference between and dll & EXE in PE format?

    - by Rajakumar
    Hi , I know exe and dlls are almost same in pe format ,i have a problem in insert a new section in a (user32)dll ,while run a application exe ,it produces Unable to locate component error .i.e ^*#%&@$<.dll(junk) was not found ,reinstatallation may fix the problem. whenever do the samething in exe ,it was work fine,but dll does not give desired output ,i cannot understand ,its behaviour.both exe &dll's are same structure ,then whats the problem ,is there may be a entry point problem ? or what is the problem ,pleasse help towards the error ? thanks...

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  • .net difference between right shift and left shift keys

    - by Mr AH
    I am currently working on an application which requires different behaviour based on whether the user presses the right or left shift key (RShiftKey, LShiftKey), however when either of these keys is pressed I only see ShiftKey | Shift. Is there something wrong with my keyboard? (laptop) do I need a new keyboard driver/keyboard in order to send the different key commands maybe... This is a pretty massive problem at the moment, as there is no way of testing that the code works (apart from unit tests). Anyone had any experience of the different shift/alt/ctrl keys?

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