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Articles indexed in April 2010

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  • Is the Core i5 Processor from Intel like the Celerons of yesteryear?

    - by Chris
    The title pretty much says it. I know that the Core i7's are Quad Core and Hyper-threaded (so 4 cores, and 8 logical), and the Core i5's are Quad Core as well but not Hyper-threaded, does this really make a difference? Or are the only people who are going to care are the ones who CPU intensive operations? I'm a developer, so I'm more concerned about hard drive speed most times than CPU speed. Any thoughts?

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  • What is the best resizable circular byte buffer available in Java?

    - by Wouter Lievens
    I need a byte buffer class in Java for single-threaded use. I should be able to insert data at the back of the buffer and read data at the front, with an amortized cost of O(1). The buffer should resize when it's full, rather than throw an exception or something. I could write one myself, but I'd be very surprised if this didn't exist yet in a standard Java package, and if it doesn't, I'd expect it to exist in some well-tested public library. What would you recommend?

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  • Dumping out Value on console using jQuery

    - by Rachel
    Hello, I come from PHP background and am used to doing var_dump, echo and print_r while doing some kind of debugging. I have just started on jquery, today is my first day infact and am trying to see if there is a way to dump out value to firebug console. Do we have similar function to var_dump or echo in jQuery or any other way to get values or debug statements displayed on the console ?

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  • Label wrapped around radio/checkbox compatibility?

    - by Mark
    I noticed that if you wrap a radio button or checkbox in a label, the whole thing becomes clickable, even without a for/id pair (in fact, it seems to ignore this because I screwed it up!) Example: <label><input type="checkbox"> some text</label> Then "some text" becomes clickable to check the box. I tested it in FF, Chrome and Opera, and IE8, does anyone know if it works in older browsers, like IE6?

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  • Lots of questions about file I/O (reading/writing message strings)

    - by Nazgulled
    Hi, For this university project I'm doing (for which I've made a couple of posts in the past), which is some sort of social network, it's required the ability for the users to exchange messages. At first, I designed my data structures to hold ALL messages in a linked list, limiting the message size to 256 chars. However, I think my instructors will prefer if I save the messages on disk and read them only when I need them. Of course, they won't say what they prefer, I need to make a choice and justify the best I can why I went that route. One thing to keep in mind is that I only need to save the latest 20 messages from each user, no more. Right now I have an Hash Table that will act as inbox, this will be inside the user profile. This Hash Table will be indexed by name (the user that sent the message). The value for each element will be a data structure holding an array of size_t with 20 elements (20 messages like I said above). The idea is to keep track of the disk file offsets and bytes written. Then, when I need to read a message, I just need to use fseek() and read the necessary bytes. I think this could work nicely... I could use just one single file to hold all messages from all users in the network. I'm saying one single file because a colleague asked an instructor about saving the messages from each user independently which he replied that it might not be the best approach cause the file system has it's limits. That's why I'm thinking of going the single file route. However, this presents a problem... Since I only need to save the latest 20 messages, I need to discard the older ones when I reach this limit. I have no idea how to do this... All I know is about fread() and fwrite() to read/write bytes from/to files. How can I go to a file offset and say "hey, delete the following X bytes"? Even if I could do that, there's another problem... All offsets below that one will be completely different and I would have to process all users mailboxes to fix the problem. Which would be a pain... So, any suggestions to solve my problems? What do you suggest?

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  • .NET HttpListener: when registering both HTTP & HTTPS I get "conflicts with an existing registration

    - by Greg
    I'm trying to use .NET HttpListener in a C# project. When I register my prefix "http://*:8080/" it does not seem to work for HTTPS urls (i.e. doesn't pick them up). When I try the following code to register both the HTTP and HTTPS versions of the prefix however I get the error: "Failed to listen on prefix 'https://:8080/' because it conflicts with an existing registration on the machine."* How can I get my prefix working for both HTTP & HTTPS? private HttpListener _listener; // Create prefixes var prefixes = new List<string>(); prefixes.Add("http://*:8080/"); prefixes.Add("https://*:8080/"); // Create HttpListener _listener = new HttpListener(); foreach (string prefix in prefixes) { _listener.Prefixes.Add(prefix); } _listener.Start(); // <== ERROR HERE thanks

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  • Anything wrong with spamming GC.KeepAlive(KeyboardHookPointer)?

    - by Alex
    GC.KeepAlive() References the specified object, which makes it ineligible for garbage collection from the start of the current routine to the point where this method is called. Not really sure about what GC.KeepAlive does other than simply store a reference so the Garbage Collector doesn't collect the object. But does calling GC.KeepAlive() on an object permanently keep an object from being collected? Or do you have to re-call GC.KeepAlive() every so often (and if so, how often)? I want to keep my keyboard hook alive.

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  • webbrowser control modal dialog

    - by kesavkolla
    I am using WebBrowserControl in winforms to automate a data entry form. This website opens a new dialog window using ShowModalDialog and puts all the form fields in that new dialog window. How can I access that modal dialog window's contents from my winforms code and want to populate fields. When I access the webbrowser's document it shows the main document not the opened dialog window. Is there any way to access the opened dialog's document? I tried to inject javascript to access contents but the javascript is blocked till the modal dialog is open.

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  • Using PDF in iPad

    - by RVN
    Has Anyone tried using PDF in iPad Application, using CGPDf functions. I have used this in iPhone and it works perfectly , but when i use the same code in iPad , the Page are Shrunk in size, after a try outs i set the Scale as follows CGContextScaleCTM(context,1.85, -1.80); This time the it fits the screen perfectly , but that was just a trial and error , why does it not fit the screen as in iPhone, i have set the view size correctly too. Anyone having a clue about it please let me know. and also this is my drawRect method where i am drawing the PDF page void drawRect:(CGRect)rect{ UIGraphicsBeginPDFPage(); CGContextRef context = UIGraphicsGetCurrentContext(); CGPDFPageRef page = CGPDFDocumentGetPage(pdf, pageNumber); CGContextSaveGState(context); CGContextTranslateCTM(context, 1.0, self.frame.size.height); CGContextScaleCTM(context,1.0, -1.0); CGContextDrawPDFPage(context, page); CGContextRestoreGState(context); } Thanks

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  • Strange UIKit bug, table view row stays selected

    - by Can Berk Güder
    I'm facing what appears to be a UIKit bug, and it takes the combination of two less commonly used features to reproduce it, so please bear with me here. I have quite the common view hierarchy: UITabBarController -> UINavigationController -> UITableViewController and the table view controller pushes another table view controller onto the navigation controller's stack when a row is selected. There's absolutely nothing special or fancy in the code here. However, the second UITableViewController, the "detail view controller" if you will, does two things: It sets hidesBottomBarWhenPushed to YES in its init method, so the tab bar is hidden when this controller is pushed: - (id)initWithStyle:(UITableViewStyle)style { if(self = [super initWithStyle:style]) { self.hidesBottomBarWhenPushed = YES; } return self; } It calls setToolbarHidden:NO animated:YES and setToolbarHidden:YES animated:YES on self.navigationController in viewWillAppear: and viewWillDisappear: respectively, causing the UIToolbar provided by UINavigationController to be displayed and hidden with animations: - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; [self.navigationController setToolbarHidden:NO animated:YES]; } - (void)viewWillDisappear:(BOOL)animated { [super viewWillDisappear:animated]; [self.navigationController setToolbarHidden:YES animated:YES]; } Now, if the second UITableViewController was pushed by selecting the row at the bottom of the screen (it doesn't have to be the last row) in the first controller, this row does not automatically get deselected when the user immediately or eventually returns to the first controller. Further, the row cannot be deselected by calling deselectRowAtIndexPath:animated: on self.tableView in viewWillAppear: or viewDidAppear: in the first controller. I'm guessing this is a bug in UITableViewController's drawing code which of course only draws visible rows, but unfortunately fails to determine correctly if the bottommost row will be visible in this case. I failed to find anything on this on Google or OpenRadar, and was wondering if anyone else on SO had this problem or knew a solution/workaround.

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  • nginx url rewriting: difference between break and last

    - by Peter
    I don't understand the difference between break and last (flags of rewrite). The documentation is rather abstruse. I've tried to switch between the two in some of my configs, but I couldn't spot any difference in behavior. Can someone please explain these flags in more detail? Preferably with an example that shows different behavior when flipping one flag to another.

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  • What program will monitor the chords I'm playing through my MIDI keyboard live?

    - by Jasper
    Leaving Cubase 5 out of the picture, when I use Reason 4.0 to compose something, I need a program running that will monitor the chords I'm pressing WHILE I'm pressing them. See, I'm a new keyboardist, and a thing like this will improve my accuracy by 100%. At one point, I'll stop needing such programs even, but for now, I'd REALLY like to have something of that sort. Free or commercial suggestions.

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  • How can I tell if a user came to a page via a Google Adwords PPC campaign?

    - by Mike Crittenden
    I have a form with a hidden "Came from Adwords" field that will be marked true (via javascript) if the user came from a PPC campaign and will stay false if not. That way, when the user submits the form, we will have each submission stored with info about whether that submission came from adwords or not, all without the user knowing. How can I fetch this info? I know that Google sets a cookie called Conversion whenever you click a PPC link to a page, but the cookie's content is just random alphanumeric characters. Is there something in the Analytics/Adwords API that will let me test for this? Do I have to resort to adding ?ref=adwords or something onto the PPC URLs so that I can test that way?

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  • Accurate Timings with Oscilloscopes on PC

    - by Paul Bullough
    In the world of embedded software (firmware) it is fairly common to observe the order of events, take timings and optimise a program by getting it to waggle PIO lines and capturing their behavior on an oscilloscope. In days gone by it was possible to toggle pins on the serial and parallel ports to achieve much the same thing on PC-based software. This made it possible to capture host PC-based software events and firmware events on the same trace and examine host software/firmware interactions. Now, my new laptop ... no serial or parallel ports! This is increasingly the case. So, does anyone have any suggestions as to go about emitting accurate timing signals off a "modern" PC? It strikes me that we don't have any immediately programmable, lag-free output pins left. The solution needs to run off a laptop, so using add-on cards that only plug into desktops are not permitted.

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  • Automatically insert cell references from one sheet into other in Calc

    - by user123456
    I have spreadsheets in OpenOffice.org Calc that consist of the first sheet and an arbitrary number of additional sheets, each collecting data for a specific month. The Month sheets have an identical structure. The first sheet is supposed to provide an overview to the most important numbers in the month sheets. Whenever I add a Month sheet, I want it to appear automatically in the Overview sheet with the structure given below. So, for each Month sheet, copy or reference some of the cells into the Overview sheet: {Referenced Sheet Name} | Fixed Header1 | Fixed Header2 | Fixed Header3 Fixed Label 1 | {CellRef 1} | {CellRef 2} | {CellRef 3} Fixed Label 2 | {CellRef 4} | {CellRef 5} | {CellRef 6} I know how do to this for just one sheet by hand, but I have no clue how to make Calc do this automatically for me. Is it possible at all? Any help appreciated.

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  • Does the order I declare pointers really matter in C? getcwd() problem...

    - by chucknelson
    On a Solaris 5.8 machine, I have the following code: [non-working code] char *buf; char *dir; size_t psize; psize = (size_t) 1024; dir = getcwd(buf, psize); On this unix machine, the above does not work and I get a segmentation fault when trying to run the program. It only works if I declare dir before buf: [working code] char *dir; char *buf; ... dir = getcwd(buf, psize); When using another flavor of Unix, such as Mac OS X, I don't get any of these what seem to be very strict rules on how to write the code. Can anyone explain what's going on with the above example? Thanks!

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  • debugging with internet explorer

    - by baiano
    I have some code that I thought I had written so that it would play nice on IE. But apparently it does not. I use IE8 for my testing and get quite frustrated with the built-in debugging 'tool'. I found that firebug has a javascript tool that debugs for IE but I have to click it for every page, wait for it to load and then test my script. Is there a way to make IE ALWAYS load the firebug .js file? I tried searching for way to set up a custom header file for my IE installation but was unsuccessful. Is there another tool out there that would be better/easier to use? Another way to test scripts for IE compatibility?

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  • Asp.net ajax event bind to two functions

    - by Chubbs
    hey Guys, I wanted to know if there's a way I can bind an Asp.net Ajax event to two different JS functions ? eg. var prm = Sys.WebForms.PageRequestManager.getInstance(); if (!prm.get_isInAsyncPostBack()) { prm.add_initializeRequest(InitializeRequest); prm.add_initializeRequest(InitializeRequest2); } function InitalizeRequest() { ... } function InitalizeRequest2() { ... }

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