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  • How to approach socket programming between C# -> Java (Android)

    - by Alex
    I've recently knocked up a server/client app for Windows & Android that allows one to send a file from Windows to an android phone over a socket connection. It works great for a single file but trying to send multiple files over in a single stream is causing me problems. I've also realised that aside from the binary data, I will need to send messages over the socket to indicate error states and other application messages. I have little experience with network programming and and wondering what is the best way forward. Basically the C# server side of the app just goes into a listening state and uses Socket.SendFile to transmit the file. On Android I use the standard Java Socket.getInputStream() to receive the file. That works great for a single file transfer, but how should I handle multiple files and error/messaging information? Do I need to use a different socket for each file? Should I be using a higher level framework to handle this or can I send everything over the single socket? Any other suggestions for frameworks or learning materials?

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  • Catch a generic exception in Java?

    - by Alex Baranosky
    We use JUnit 3 at work and there is no ExpectedException annotation. I wanted to add a utility to our code to wrap this: try { someCode(); fail("some error message"); } catch (SomeSpecificExceptionType ex) { } So I tried this: public static class ExpectedExceptionUtility { public static <T extends Exception> void checkForExpectedException(String message, ExpectedExceptionBlock<T> block) { try { block.exceptionThrowingCode(); fail(message); } catch (T ex) { } } } However, Java cannot use generic exception types in a catch block, I think. How can I do something like this, working around the Java limitation? Is there a way to check that the ex variable is of type T?

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  • Are there actually lag times to remove an email address from "the system"? [closed]

    - by Alex Gosselin
    For example, you send an unsubscribe message to a legitimate company or a spam, they reply that they will remove you and it may take up to 72 hours to take effect. I find it hard to believe anything that simple could take more than 3/4 of a second to take effect system wide. Another example would be when you call the visa activation line, there is a "delay" of several minutes while they try to sell you some kind of insurance. Usually just as you get the point across that you don't want it they will tell you your card has been activated and let you go. Are these delays real?

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  • Call to undefined function phpinclude_once()

    - by Alex Zylman
    I'm making a new php page and I get the error Fatal error: Call to undefined function phpinclude_once() in /home8/nuventio/public_html/marketing/pb2/dashboard.php on line 1 I'm not sure why I'm getting this error, I've done previous pages the same way as this with no problems. This is the line in question: <?php include_once("../utils.php"); ?> After that it just goes into regular HTML code. It works fine without that line.

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  • Use user control in the same folder as the page.

    - by Alex
    I get this message at runtime of ASP.NET 2 page : The page 'MyFolder/blabla.aspx' cannot use the user control 'MyFolder/MyControl.ascx', because it is registered in web.config and lives in the same directory as the page. Of course I can separate them to 2 different folders and thus solve the problem, but the question is : WTF !?!?! Why I can't put them in the same folder ?! Why can't they all .. get along !?! :) Thanks

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  • how to get the PageFormat from a Java.awt.print.PrinterJob

    - by Alex
    Hi, I'm trying to use the PageFormat information to modify my javax.swing based printout prior to printing it. I am stumped as to how I can get the PageFormat from the PrintJob (which is obtained using getPrinterJob() and printDialog()). I know there is the getPageFormat method, but I can't figure out how to get the PrintRequestAttributeSet (which is not the printJob.getPrintService().getPrintAttributes()). Honestly, all I really want to know is the width and height of the page. Any ideas on how I can do that? Thanks.

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  • How to make an element slide with the viewport as it scrolls?

    - by alex
    I've Googled for this but must be using the wrong keywords. Basically I want to use the effect that Magento and now Stack Overflow uses. That is, there is an element in a column, and when you scroll down, it sticks to the top of the viewport. And once scrolled up again, it goes back into the normal page flow. This Ask A Question is a good page for example. Scroll down and watch the "How to Format" element come down (might need to make your viewport smaller if you have a large screen to see the effect). I've noticed it is setting position: fixed in the CSS. The JavaScript however is obfuscated. What's the easiest way to achieve this effect? Is there a jQuery plugin available?

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  • How do I put these: @{$subset}, [@ext_subset], [$last_item] in PHP?

    - by Alex
    I'm having trouble translating a subroutine from Perl to PHP (I'm new to Perl). The entire subroutine is as follows: sub find_all_subsets { if (1 == scalar (@_)) {return [@_]} else { my @all_subsets = () ; my $last_item = pop (@_) ; my @first_subsets = find_all_subsets (@_) ; foreach my $subset (@first_subsets) { push (@all_subsets, $subset) ; my @ext_subset = @{$subset} ; push (@ext_subset, $last_item) ; push (@all_subsets, [@ext_subset]) ; } push (@all_subsets, [$last_item]) ; return (@all_subsets) ; } } My problem is that I really don't quite understand the Perl syntax, so I'm having trouble writing these @{$subset}, [@ext_subset] and [$last_item] in PHP. Thanks and sorry if the question is stupid.

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  • Text box input target iframe

    - by alex
    I'm an html noob and I just wanted to know if it's possible to make a text box in which you could type a website and when you click submit it will load the website in the iframe of your choice.

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  • SElinux integrety check

    - by Alex
    How can i check (with SELinux) access to the file by process name? For examle: we have 2 process: * /usr/bin/foo1 * /usr/bin/foo2 They are run under account with username userA and try to open for modify file: /home/userA/test.txt I want that if foo1 try to open file - it's ok. But if foo2 try to open this file - i have message about this in /var/log Problem is that both processes have the same user ID. And i cant use RBAC by username.

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  • Retrieving an element by array index in jQuery vs the each() function.

    - by Alex Ciminian
    I was writing a "pluginable" function when I noticed the following behavior (tested in FF 3.5.9 with Firebug 1.5.3). $.fn.computerMove = function () { var board = $(this); var emptySquares = board.find('div.clickable'); var randPosition = Math.floor(Math.random() * emptySquares.length); emptySquares.each(function (index) { if (index === randPosition) { // logs a jQuery object console.log($(this)); } }); target = emptySquares[randPosition]; // logs a non-jQuery object console.log(target); // throws error: attr() not a function for target board.placeMark({'position' : target.attr('id')}); } I noticed the problem when the script threw an error at target.attr('id') (attr not a function). When I checked the log, I noticed that the output (in Firebug) for target was: <div style="width: 97px; height: 97px;" class="square clickable" id="8"></div> If I output $(target), or $(this) from the each() function, I get a nice jQuery object: [ div#8.square ] Now here comes my question: why does this happen, considering that find() seems to return an array of jQuery objects? Why do I have to do $() to target all over again? [div#0.square, div#1.square, div#2.square, div#3.square, div#4.square, div#5.square, div#6.square, div#7.square, div#8.square] Just a curiosity :).

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  • how to get right offset of an element? - jQuery

    - by Alex
    This is probably a really simple question, but how do I go about getting the right offset of an element in jQuery? I can do: $("#whatever").offset().left; and it is valid. But it seems that: $("#whatever").offset().right is undefined. So how does one accomplish this in jQuery? Thanks!!

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  • Sending a file to an API - C#

    - by alex
    I'm trying to use an API which sends a fax. I have a PHP example below: (I will be using C# however) <?php //This is example code to send a FAX from the command line using the Simwood API //It is illustrative only and should not be used without the addition of error checking etc. $ch = curl_init("http://url-to-api-endpoint"); $fax_variables=array( 'user'=> 'test', 'password'=> 'test', 'sendat' => '2050-01-01 01:00', 'priority'=> 10, 'output'=> 'json', 'to[0]' => '44123456789', 'to[1]' => '44123456780', 'file[0]'=>'@/tmp/myfirstfile.pdf', 'file[1]' => '@/tmp/mysecondfile.pdf' ); print_r($fax_variables); curl_setopt ($ch, CURLOPT_POST, 1); curl_setopt ($ch, CURLOPT_POSTFIELDS, $fax_variables); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); $result=curl_exec ($ch); $info = curl_getinfo($ch); $result['http_code']; curl_close ($ch); print_r($result); ?> My question is - in the C# world, how would I achieve the same result? Do i need to build a post request? Ideally, i was trying to do this using REST - and constructing a URL, and using HttpWebRequest (GET) to call the API

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  • null reference problems with c#

    - by alex
    Hi: In one of my window form, I created an instance of a class to do some works in the background. I wanted to capture the debug messages in that class and displayed in the textbox in the window form. Here is what I did: class A //window form class { public void startBackGroundTask() { B backGroundTask = new B(this); } public void updateTextBox(string data) { if (data != null) { if (this.Textbox.InvokeRequired) { appendUIDelegate updateDelegate = new appendUIDelegate(updateUI); try { this.Invoke(updateDelegate, data); } catch (Exception e) { Console.WriteLine(e.Message); } } else { updateUI(data); } } } private void updateUI(string data) { if (this.Textbox.InvokeRequired) { this.Textbox.Invoke(new appendUIDelegate(this.updateUI), data); } else { //update the text box this.Textbox.AppendText(data); this.Textbox.AppendText(Environment.NewLine); } } private delegate void appendUIDelegate(string data); } class B // background task { A curUI; public b( A UI) { curUI = UI; } private void test() { //do some works here then log the debug message to UI. curUI.updateTextBox("message); } } I keep getting a null reference exception after this.Invoke(updateDelegate, data); is called. I know passing "this" as a parameter is strange. But I want to send the debug message to my window form. Please help. Thanks

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  • Just how much do I want to make virtual?

    - by Alex
    I am writing an abstract superclass where literally every method is going to be overridden. There is some default functionality I could implement, but most of the time it's enough to leave the implementation to the subclass writer. Since just about every method is going to be overwritten, how much should I make virtual and how much should I just leave as regular methods? In the current incarnation, everything is virtual, but I still haven't let this loose to anyone to use, so the design is flexible. What advantages/disadvantages are there to virtual functions? Links to good reading material about this would be appreciated.

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  • What is the difference between printf() and puts() in C?

    - by alex
    First up, I should let you know that I am learning C, so my apologies if this question seems stupid to a more advanced developer. I know you can print with printf() and puts(). I can also see that printf() allows you to embed variables inside and do some stuff like formatting. Is puts() merely a primitive version of printf(). Should it be used for every possible printf() without string interpolation? Thanks

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  • TableView Background image going over cell textLabel

    - by Alex Trott
    Currently my tableview looks like this: as you can see, cell.textLabel and cell.detailTextLable both load this background, and i can't work out how to get them to stop loading the background, and for it only to be the backing on the cell. Here's my current code to change the cell: - (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath { [cell setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"tableCell.png"]]]; } How can i get round this problem? Thanks in advance.

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