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  • SQLite editor capable of handling BLOB type for Mac

    - by Phil
    Hi, I am looking for a free/cheap SQLite editor that can handle BLOB type for Mac OS X. Basically, I just need to create a database that contains images, then load it to an iPhone app bundle. No need for fancy queries. Could someone recommend the best editor available out there for this purpose? Thanks a lot

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  • What's the best practice in case something goes wrong in Perl code?

    - by Geo
    I saw code which works like this: do_something($param) || warn "something went wrong\n"; and I also saw code like this: eval { do_something_else($param); }; if($@) { warn "something went wrong\n"; } Should I use eval/die in all my subroutines? Should I write all my code based on stuff returned from subroutines? Isn't eval'ing the code ( over and over ) gonna slow me down?

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  • PHP Postgres constraint violation - can I get the constraint name somehow?

    - by RnR
    We have a web application talking to a Postgres SQL database at work - I've set up many constraints on the server to keep data consistent but we have problems with reporting nicely what it is that prevents the user from entering his (invalid) data at a given moment. The only thing we can get is "Constraint violation" but that isn't very descriptive, from perl or directly from PGAdmin we get nice info as to which constraint caused the failure (the constraint's name) - is there a way to do the same in PHP? We're able to upgrade PHP or use a different db access module if it would help so I'm interested in knowing if it's possible to do using any way that you could safely recommend.

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  • How do I add events to nested server controls? (ASP.Net)

    - by bert
    I am building a custom master page type control i.e. sort of like a datagrid but should be easier to add custom functionality into it. It's going great but part of the desired functionality is to have a paging control that switches on and off and part of that control would be a textbox that displays the current page number and on TextChanged redirects to the new page of the dataset. The problem I'm having is that technically the textbox which has its event fired is embedded in a control that is embedded in the control you actually put on the page sort of like Page  | Display Control  | Paging Control  | Textbox Buried all the way down there the event is not firing. Worse the postback javascript isn't even being written onto the page (Nothing on the page posts back so far this is the only bit that really needs to). I've been trawling around Google for quite a while now and picked up that I need to implement INamingContainer (done) and I need to add the control into the page's control tree (is Pre_Init too late for that? When's a good time to Add the Control to the page?) then the event should fire, apparently. But I've been unable to find an example of best practice on this there are quite a few near misses where people are having button angst but this isn't a button. So can anyone point me in the direction of getting a control embedded in a control embedded in a control added to a page to behave properly?

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  • Which of the two exceptions was called?

    - by Rob
    If I have a routine that can throw an ArgumentException in two places, something like... if (Var1 == null) { throw new ArgumentException ("Var1 is null, this cannot be!"); } if (Val2 == null) { throw new ArgumentException ("Var2 is null, this cannot be either!"); } What’s the best way of determining in my calling procedure which of the two exceptions was thrown? Or Am I doing this in the wrong fashion?

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  • Handling multiple post-defined datasource connections based on user

    - by choudeshell
    How should I handle multiple user-connection defined datasource connection in my .NET application? To illustrate this better; the user provides three (3) pieces of information, username, password and data source name. This data source name is then looked-up in a central database telling that application which main database this user should connect to. My question is, in the DataAccess layer, should we only pass down enough information to uniquely identify that user, and query the central database each time in the DAL; or, should we provide another way to pass the datasource connection down to the DAL?

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  • handling matrix data in python

    - by Ovisek
    I was trying to progressively subtract values of a 3D matrix. The matrix looks like: ATOM 1223 ZX SOD A 11 2.11 -1.33 12.33 ATOM 1224 ZY SOD A 11 -2.99 -2.92 20.22 ATOM 1225 XH HEL A 12 -3.67 9.55 21.54 ATOM 1226 SS ARG A 13 -6.55 -3.09 42.11 ... here the last three columns are representing values for axes x,y,z respectively. now I what I wanted to do is, take the values of x,y,z for 1st line and subtract with 2nd,3rd,4th line in a iterative way and print the values for each axes. I was using: for line in map(str.split,inp): x = line[-3] y = line[-2] z = line[-1] for separating the values, but how to do in iterative way. should I do it by using Counter.

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  • Why can't I write just a try with no catch or finally?

    - by Camilo Martin
    Sometimes I do this and I've seen others doing it too: VB: Try DontWannaCatchIt() Catch End Try C#: try { DontWannaCatchIt(); } catch {} I know I should catch every important exception and do something about it, but sometimes it's not important to - or am I doing something wrong? Is this usage of the try block incorrect, and the requirement of at least one catch or finally block an indication of it?

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  • Handling out of memory errors in iPhone

    - by hgpc
    I would like to handle out of memory errors in iPhone to execute logic with lesser memory requirements in case I run of of memory. In particular, I would like to do something very similar to the followin pseudo-code: UIImage* image; try { image = [UIImage imageNamed:@"high_quality_image.png"]; } catch (OutOfMemoryException e) { image = [UIImage imageNamed:@"low_quality_image.jpg"]; } First I attempt to load a high-quality image, and if I run out of memory while doing it, then I use a lower quality image. Would this be possible?

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  • Handling missing data

    - by soppotare
    Say I have a simple helpdesk application which logs calls made by users. I would typically have such fields in a table relating to the call e.g. CallID, Description, CustomerID etc. I Would also have a table of customers including CustomerID, Username, Password, FullName etc. Now when a user is deleted from the customers table then the inner join between the calls table and the users table to find out historically which user logged a call would produce no results. How do people usually deal with this? Have seperate customer and useraccount tables Just disable the accounts so the data is still available Record the customers name in the calls table as a seperate field. or any other methods / suggestions?

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  • sql exception handling

    - by christine33990
    CREATE OR REPLACE PROCEDURE p_createLocaltable IS table_already_exist EXCEPTION; PRAGMA EXCEPTION_INIT (table_already_exist, -00955); BEGIN create table local_table as select * from supplied_table where rownum < 1; EXCEPTION when table_already_exist then DBMS_OUTPUT.put_line('Table already exists , does not need to recreate it'); END; can anyone see any problem of the above code?

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  • Handling a colon in an element ID in a CSS selector

    - by sblundy
    JSF is setting the ID of an input field to search_form:expression. I need to specify some styling on that element, but that colon looks like the beginning of a pseudo-element to the browser so it gets marked invalid and ignored. Is there anyway to escape the colon or something? input#search_form:expression { ///... }

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  • Problem with Firefox, javascript, and Canvas

    - by Rob
    I'm having a Firefox-specific issue with a script I wrote to create 3d layouts. The correct behavior is that the script pulls the background-color from an element and then uses that color to draw on the canvas. When a user mouses over a link and the background-color changes to the :hover rule, the color being drawn changes on the canvas changes as well. When the user mouses out, the color should revert back to non-hover color. This works as expected in Webkit browsers and Opera, but Firefox chokes on it if mouseout is triggered and no mouseover event follows it. This is easier to see than for me to describe, and it's too much code to post here, so here is a link: http://www.robnixondesigns.com/strangematter/

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  • Whether to check for null

    - by coffeeaddict
    I know that you should always check incoming params to a method for null. But what if I have this scenario with a try/catch referring to a local variable. Do I really need to check for null below? Because it's gonna catch it anyway if it's null and the next line of code tries to use the refundResponse variable: public string DoRefund(...) { try { ...... string refundTransactionID = string.Empty; ...... RefundTransactionResponseType refundResponse = transaction.DoRefund(...); if (refundResponse != null) refundTransactionID = refundResponse.RefundTransactionID; ..... } catch (Exception ex) { LogError(ex); return ex.ToString(); } }

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  • Handling large numbers of sockets with .NET

    - by Dreaddan
    I'm looking at writing a application that need to be able to handle in the region of 200 connections / sec and was wondering if C# and .NET will handle this or if I need to really be looking at C++ to do this? It looks like SocketAsyncEventArgs may be the way to go but thought id check before I plough in to it. Each transaction should only last less than a second but could take up to 15 seconds each if that makes any difference.

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  • Facebook FB.Event.subscribe does not work

    - by DNReNTi
    I'd like to follow how many likes I get on my page, but something is wrong. I am using the Facebook javascript event handler but it doesnt work. It should alerts me when I click on the like or on the dislike button but it does not do anything. Any idea where I am wrong? Thanks! And sorry for my english. Here is my UPDATED code: <!DOCTYPE html> <html xmlns:fb="http://ogp.me/ns/fb#"> <head> <title>FBlike check</title> </head> <body> <div id="fb-root"></div> <script> (function(d, s, id) { var js, fjs = d.getElementsByTagName(s)[0]; if (d.getElementById(id)) return; js = d.createElement(s); js.id = id; js.src = "//connect.facebook.net/en_US/all.js#xfbml=1&appId=00000000000000000"; fjs.parentNode.insertBefore(js, fjs); }(document, 'script', 'facebook-jssdk')); FB.Event.subscribe('edge.create', function(response) { alert('You liked the URL: ' + response); } ); </script> <fb:like href="https://www.facebook.com/XYZ" send="false" layout="button_count" width="200" show_faces="false"></fb:like> </body> </html>

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  • related to java file handling.

    - by sadia
    In Java how can I take the data of my file on my display screen? I want to use data in my file and also want that data to be displayed on my output screen when I execute my program. Can any body please help by providing me such example in Java language. Thank you!

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  • UIView not handling touches

    - by Biranchi
    Hi All, I have set my status bar hidden in my Application. [application setStatusBarHidden:YES]; I have added an UIView on the window as a subview at 0,0,320,40. But I am not able to get touches on my View ? What is the problem ??? Thanks

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  • try except block in Delphi

    - by Nik
    Do you guys know a way to trap log and re-raise exception in Delphi code. A simple example: procedure TForm3.Button1Click(Sender: TObject); begin try raise Exception.Create('Bum'); except on E: Exception do begin MyHandleException(E); end; end; end; procedure TForm3.MyHandleException(AException: Exception); begin ShowMessage(AException.Message); // raise AException; - this will access violate end; So I need to re-raise it in the except block but I was wondering is there a better way to write my own method to handle and (on specific conditions) to re-raise exceptions?

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  • Passing data to notification page

    - by FRKT
    I'm not sure what the best way of populating a notification page is. I've been using sessions to populate it with information, but this falls short if the user is blocking cookies. I've considered passing it in HTTP GET variables, but I'm unsure whether it's a good alternative since its length is limited by some browsers. Which method do you prefer?

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  • How to make a VB exception handling for no value in a Textbox

    - by Twocold
    I want to catch an exception when user enter no value in a Textbox and try to process further by press a button, I know I can use "If else" statement to make it. but in terms of "Try and Catch" block, I dont know how. Here is the code sample. Dim NameString As String Try NameString = OperatorNameTextBox.Text Catch ex As ArgumentException MessageBox.Show("Enter a String Value") End Try

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  • forcing to Not to process an event

    - by BDotA
    C# WinApps: the main form has a key binding to CTRL-V ...so anywhere in the main app when I press CTRL-V something runs..good ... but also there are some MDI apps that are opening inside this main app ... in one of those there is a test box...ah! now CTRL-V also has a meanining for text box which is "Paste" ... so I added PreViewKeyDown to textbox and handled it, so now it is pasting BUT it is ALSO doing the main CTRL-V key binding that I had defined for the whole app ... but I do no want this to happen.... what can I do? ( I cannot change the key binding od the main app. I must keep it.)

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