Search Results

Search found 6587 results on 264 pages for 'double dispatch'.

Page 98/264 | < Previous Page | 94 95 96 97 98 99 100 101 102 103 104 105  | Next Page >

  • Windows 8 Initial User Experience

    - by Kevin Shyr
    Today is the second day I'm using a Windows 8 laptop.  Load up time is fast, and changing applications is very smooth.  However, I keep finding myself hitting the windows key (double-clicking a PDF file, and, what?  How do I get back?)Other than that, the experience has been fine.  So far this has not been any worse than other windows upgrade experience I had so far.  No bad news is good news here.

    Read the article

  • Write and fprintf for file I/O

    - by Darryl Gove
    fprintf() does buffered I/O, where as write() does unbuffered I/O. So once the write() completes, the data is in the file, whereas, for fprintf() it may take a while for the file to get updated to reflect the output. This results in a significant performance difference - the write works at disk speed. The following is a program to test this: #include <fcntl.h #include <unistd.h #include <stdio.h #include <stdlib.h #include <errno.h #include <stdio.h #include <sys/time.h #include <sys/types.h #include <sys/stat.h static double s_time; void starttime() { s_time=1.0*gethrtime(); } void endtime(long its) { double e_time=1.0*gethrtime(); printf("Time per iteration %5.2f MB/s\n", (1.0*its)/(e_time-s_time*1.0)*1000); s_time=1.0*gethrtime(); } #define SIZE 10*1024*1024 void test_write() { starttime(); int file = open("./test.dat",O_WRONLY|O_CREAT,S_IWGRP|S_IWOTH|S_IWUSR); for (int i=0; i<SIZE; i++) { write(file,"a",1); } close(file); endtime(SIZE); } void test_fprintf() { starttime(); FILE* file = fopen("./test.dat","w"); for (int i=0; i<SIZE; i++) { fprintf(file,"a"); } fclose(file); endtime(SIZE); } void test_flush() { starttime(); FILE* file = fopen("./test.dat","w"); for (int i=0; i<SIZE; i++) { fprintf(file,"a"); fflush(file); } fclose(file); endtime(SIZE); } int main() { test_write(); test_fprintf(); test_flush(); } Compiling and running I get 0.2MB/s for write() and 6MB/s for fprintf(). A large difference. There's three tests in this example, the third test uses fprintf() and fflush(). This is equivalent to write() both in performance and in functionality. Which leads to the suggestion that fprintf() (and other buffering I/O functions) are the fastest way of writing to files, and that fflush() should be used to enforce synchronisation of the file contents.

    Read the article

  • Generating tileable terrain using Perlin Noise [duplicate]

    - by terrorcell
    This question already has an answer here: How do you generate tileable Perlin noise? 9 answers I'm having trouble figuring out the solution to this particular algorithm. I'm using the Perlin Noise implementation from: https://code.google.com/p/mikeralib/source/browse/trunk/Mikera/src/main/java/mikera/math/PerlinNoise.java Here's what I have so far: for (Chunk chunk : chunks) { PerlinNoise noise = new PerlinNoise(); for (int y = 0; y < CHUNK_SIZE_HEIGHT; ++y) { for (int x = 0; x < CHUNK_SIZE_WIDTH; ++x) { int index = get1DIndex(y, CHUNK_SIZE_WIDTH, x); float val = 0; for (int i = 2; i <= 32; i *= i) { double n = noise.tileableNoise2(i * x / (float)CHUNK_SIZE_WIDTH, i * y / (float)CHUNK_SIZE_HEIGHT, CHUNK_SIZE_WIDTH, CHUNK_SIZE_HEIGHT); val += n / i; } // chunk tile at [index] gets set to the colour 'val' } } } Which produces something like this: Each chunk is made up of CHUNK_SIZE number of tiles, and each tile has a TILE_SIZE_WIDTH/HEIGHT. I think it has something to do with the inner-most for loop and the x/y co-ords given to the noise function, but I could be wrong. Solved: PerlinNoise noise = new PerlinNoise(); for (Chunk chunk : chunks) { for (int y = 0; y < CHUNK_SIZE_HEIGHT; ++y) { for (int x = 0; x < CHUNK_SIZE_WIDTH; ++x) { int index = get1DIndex(y, CHUNK_SIZE_WIDTH, x); float val = 0; float xx = x * TILE_SIZE_WIDTH + chunk.x; float yy = y * TILE_SIZE_HEIGHT + chunk.h; int w = CHUNK_SIZE_WIDTH * TILE_SIZE_WIDTH; int h = CHUNK_SIZE_HEIGHT * TILE_SIZE_HEIGHT; for (int i = 2; i <= 32; i *= i) { double n = noise.tileableNoise2(i * xx / (float)w, i * yy / (float)h, w, h); val += n / i; } // chunk tile at [index] gets set to the colour 'val' } } }

    Read the article

  • Programming Language most relevant to the Financial sector?

    - by NoviceCoding
    I am a freshman in college and doing a software engineering/ finance double major. I've been learning programming on my own and have a good bit of familiarity with php by now. I was wondering what you guys think the most relevant programming language is for financial/investment banking use? I have read this thread: Books on developing software for financial markets/investment banks I want to start learning/reading up on a language (the basics not financial/quant stuff) to set a foundation for the future financial/quant stuff.

    Read the article

  • How do I run an executable file from a pendrive?

    - by user64720
    I am trying to run Portable Truecrypt from a USB Pendrive. I already extracted the package and all but the only way it really opens Truecrypt is if the executable is on my home folder. It never works when the executable is on the pendrive. I have tried to go to permissions and set "allow to run as an application" but anyway when double-clicking, the same alert comes up: Unable to present media/Kingston/usr/bin/truecrypt, there is no application installed for executable files.

    Read the article

  • Creating an object that is ready to be used & unset properties - with IoC

    - by GetFuzzy
    I have a question regarding the specifics of object creation and the usage of properties. A best practice is to put all the properties into a state such that the object is useful when its created. Object constructors help ensure that required dependencies are created. I've found myself following a pattern lately, and then questioning its appropriateness. The pattern looks like this... public class ThingProcesser { public List<Thing> CalculatedThings { get; set; } public ThingProcesser() { CalculatedThings = new List<Thing>(); } public double FindCertainThing() { CheckForException(); foreach (var thing in CalculatedThings) { //do some stuff with things... } } public double FindOtherThing() { CheckForException(); foreach (var thing in CalculatedThings) { //do some stuff with things... } } private void CheckForException() { if (CalculatedThings.Count < 2) throw new InvalidOperationException("Calculated things must have more than 2 items"); } } The list of items is not being changed, just looked through by the methods. There are several methods on the class, and to avoid having to pass the list of things to each function as a method parameter, I set it once on the class. While this works, does it violate the principle of least astonishment? Since starting to use IoC I find myself not sticking things into the constructor, to avoid having to use a factory pattern. For example, I can argue with myself and say well the ThingProcessor really needs a List to work, so the object should be constructed like this. public class ThingProcesser { public List<Thing> CalculatedThings { get; set; } public ThingProcesser(List<Thing> calculatedThings) { CalculatedThings = calculatedThings; } } However, if I did this, it would complicate things for IoC, and this scenario hardly seems appropriate for something like the factory pattern. So in summary, are there some good guidelines for when something should be part of the object state, vs. passed as a method parameter? When using IoC, is the factory pattern the best way to deal with objects that need created with state? If something has to be passed to multiple methods in a class, does that render it a good candidate to be part of the objects state?

    Read the article

  • Mouse Not Working Properly

    - by James
    I just did a clean install of Ubuntu 11.10 but for some reason the mouse isn't working properly. Problems I'm experiencing are: left button on the mouse doesn't work, the cursor doesn't highlight anything, as well, the right side will not do a double click function. Doesn't seem to bring up the mouse menu to "go back" as well, "go forward" options. In order to make things work, I have to use the Enter key, and arrow keys.

    Read the article

  • Vlc Player not opening

    - by vivek
    For the last few days, my vlc player is not responding at all, when i try to double click any file or even run vlc without any file, it just doesn't open up. I tried to open it through terminal and it was working fine but there were no option coming on vlc screen and also if i close the terminal, vlc closes automatically. I can't figure how to make vlc back to its original way so that i can access any file through vlc. Any help will be appreciated..

    Read the article

  • Using Sizer for recording presentations

    - by John Paul Cook
    I needed to do some screen captures and recordings of SSMS and realized this is a common problem that many of you could use some help with. There is a freeware tool called Sizer (thanks to Paul Nielsen for telling me about it) that lets you chose your window size. I downloaded the zip file instead of the msi because I didn’t want to install anything. The extracted executable works perfectly as a portable application. After double-clicking the Sizer executable, an icon resembling a plus sign appears...(read more)

    Read the article

  • Using multiplication and division with delta time

    - by tesselode
    Using delta time with addition and subtraction is easy. player.x += 100 * dt However, multiplication and division complicate things a bit. For example, let's say I want the player to double his speed every second. player.x = player.x * 2 * dt I can't do this because it'll slow down the player (unless delta time is really high). Division is the same way, except it'll speed things way up. How can I handle multiplication and division with delta time?

    Read the article

  • Samsung présente ses tablettes hybrides sous Windows 8 et Windows RT, le constructeur dévoile le premier smartphone Windows Phone 8

    Samsung présente ses tablettes hybrides sous Windows 8 et Windows RT le constructeur dévoile le premier smartphone Windows Phone 8 Samsung a dévoilé ses nouveaux dispositifs Windows 8 en marge de la conférence européenne de l'électronique IFA de Berlin. Lors d'un événement organisé par le constructeur coréen, celui-ci a présenté sa nouvelle génération de tablettes hybrides, facilement convertibles en ordinateurs portables sous Windows 8 et Windows RT. La famille de dispositifs ATIV dispose d'une tablette ARM fonctionnant sous Windows RT. ATIV Tab est dotée d'un écran de 10,1 pouces d'une résolution de 1366x768 pixels et est propulsée par une puce SoC double coeur de 1,5 Ghz, une mé...

    Read the article

  • Dell Mini 10 Mouse Pad Problems

    - by MetaDark
    After going from 10.04 - 10.10 (not upgraded, completely reinstalled because of upgrade issues) I found a weird problem with my mouse pad. Whenever I clicked on the left or right mouse buttons (integrated into the touch pad) when I released them, it seemed like it was detecting a double click and ended up choosing the option the mouse was hovering over. Has anyone else experienced issues like this, and if it is possible, could I fix it?

    Read the article

  • I can't autostart xfce4 power manger lubuntu 13.10

    - by user203766
    I just upgraded my 64 bit lubuntu to 13.10 on my netbook today. After the upgrade, I simply can't autostart the xfce4 power manager. I tried to add from the desktop session settings, I tried to copy the power manager.desktop file to ~/.config/autostart folder. Everything looks fine, than I logout, log back in, and the darn power manager, just won't start automatically. It only starts when I double click the icon, or if i start it from the terminal. Help me please

    Read the article

  • Opera passe la barre symbolique des 100 millions d'utilisateurs et serait le troisième navigateur le

    Mise à jour du 12/04/10 [Les commentaires de cette mise à jour commencent ici] Opera passe la barre symbolique des 100 millions d'utilisateurs Et serait le troisième navigateur le plus utilisé en Europe devant Chrome Après avoir doublé ses téléchargements en Europe depuis l'arrivée du "Ballot Screen" sur Windows (lire ci-avant), Opera annonce aujourd'hui avoir passé la barre symbolique des 100 millions d'utilisateurs. Ce chiffre prend en compte toutes les versions du navigateur à...

    Read the article

  • How to Export a Contact to and Import a Contact from a vCard (.vcf) File in Outlook 2013

    - by Lori Kaufman
    vCard is the abbreviation for Virtual Business Card and is the standard format (.vcf files) for electronic business cards. vCards allow you to create and share contact information over the internet, such as in email messages and instant messaging. You can also use vCards to move contact information from one email or personal information management program to another, as long as both programs support the .vcf file format. vCards can contain name and address information, as well as phone numbers, email addresses, URLs, images, and audio clips. We will show you how to export a contact to and import a contact from a vCard, or .vcf file, in Outlook. First access the People section by clicking People at the bottom of the Outlook window. To view your contact in business card format, click Business Card in the Current View section of the Home tab. Select a contact by clicking on the name bar at the top of the business card. To export the selected contact as a vCard, click the File tab. On the Account Information screen, click Save As in the list of options on the left. The Save As dialog box displays. By default, the name of the contact is used to name the .vcf file in the File name edit box. Change the name, if desired, select a location for the file, and click Save. The contact is saved as a .vcf file. To import a vCard, or .vcf file, into Outlook, simply double-click on the .vcf file. By default, .vcf files are automatically associated with Outlook, so the file is opened in Outlook as a Contact. Make any changes or additions to the contact in the contact editing window. To save the contact, click Save & Close in the Actions section of the Contact tab. NOTE: Notice that because this contact is new, the full contact editing window displays rather than the Contact Card that displays when double-clicking on a contact. You can open the full contact editing window instead of the Contact Card when editing a contact or searching for a contact. The contact is added to the Contacts folder. You can add your contact information to a signature in business card format, and it will display as shown above in emails. We have covered how to create signatures and will be discussing more about signatures and business cards in Outlook.     

    Read the article

  • Find out the URL of a RSS feed in Outlook

    - by Marko Apfel
    Challenge In the past I added some RSS feeds to outlook. For one of these feeds now I would like to know the original URL. But this is not very intuitive to eliminate. Problem Via (intuitive) right mouse click you could open a properties dialog of a feed. But there is no hint for the URL! Solution You could find the information in the RSS Feed Options dialog Open Account Settings Double click the feed and voila - here is the URL

    Read the article

  • I want to play mp3 in rythmbox but it says python v2 plugins requires mpeg-1 layer mp3 decoder but i dont have internet on that computer,

    - by Ubuntu_lover
    Because i use internet from usb device which supports only on windows, and when I downloaded offline files from packages.ubuntu.com and linuxappsfinder.com and tried to install them in ubuntu, i just double clicked on such file(whose format extension was .deb), then it opened in ubuntu software center but said, dependency is not supported, How can i install softwares and plugins or codecs in ubuntu, without internet? I tried to make file through terminal using zipped files, (tar.bz2), but said something xml not found.

    Read the article

  • Google Accelerates Chrome 5 Beta

    <b>Datamation: </b>"Chrome's JavaScript delivery is powered by Google's V8 technology, now improved with what the search giant described as double-digit gains over the previous Chrome beta release."

    Read the article

  • Protobuf design patterns

    - by Monster Truck
    I am evaluating Google Protocol Buffers for a Java based service (but am expecting language agnostic patterns). I have two questions: The first is a broad general question: What patterns are we seeing people use? Said patterns being related to class organization (e.g., messages per .proto file, packaging, and distribution) and message definition (e.g., repeated fields vs. repeated encapsulated fields*) etc. There is very little information of this sort on the Google Protobuf Help pages and public blogs while there is a ton of information for established protocols such as XML. I also have specific questions over the following two different patterns: Represent messages in .proto files, package them as a separate jar, and ship it to target consumers of the service --which is basically the default approach I guess. Do the same but also include hand crafted wrappers (not sub-classes!) around each message that implement a contract supporting at least these two methods (T is the wrapper class, V is the message class (using generics but simplified syntax for brevity): public V toProtobufMessage() { V.Builder builder = V.newBuilder(); for (Item item : getItemList()) { builder.addItem(item); } return builder.setAmountPayable(getAmountPayable()). setShippingAddress(getShippingAddress()). build(); } public static T fromProtobufMessage(V message_) { return new T(message_.getShippingAddress(), message_.getItemList(), message_.getAmountPayable()); } One advantage I see with (2) is that I can hide away the complexities introduced by V.newBuilder().addField().build() and add some meaningful methods such as isOpenForTrade() or isAddressInFreeDeliveryZone() etc. in my wrappers. The second advantage I see with (2) is that my clients deal with immutable objects (something I can enforce in the wrapper class). One disadvantage I see with (2) is that I duplicate code and have to sync up my wrapper classes with .proto files. Does anyone have better techniques or further critiques on any of the two approaches? *By encapsulating a repeated field I mean messages such as this one: message ItemList { repeated item = 1; } message CustomerInvoice { required ShippingAddress address = 1; required ItemList = 2; required double amountPayable = 3; } instead of messages such as this one: message CustomerInvoice { required ShippingAddress address = 1; repeated Item item = 2; required double amountPayable = 3; } I like the latter but am happy to hear arguments against it.

    Read the article

  • Hilarious web addresses revealed in new book

    <b>Telegraph:</b> "The compendium of ill thought out web addresses, largely from companies who naively slurred their innocent-sounding names into a single word without noticing the resulting double entendres, lists more than 150 "slurls", or slur URLs."

    Read the article

  • Getting current time in milliseconds

    - by user90293423
    How to get the current time in milliseconds? I'm working on a hacking simulation game and when ever someone connects to another computer/NPC, a login screen popups with a button on the side called BruteForce. When BruteForce is clicked, what i want the program to do is, calculate how many seconds cracking the password is going to take based on the player's CPU speed but that's the easy part. The hard part is i want to enter a character in the password's box every X milliseconds based on a TimeToCrack divided by PasswordLength formula. But since i don't know how to find how many milliseconds have elapsed since the second has passed, the program waits until the CurrentTime is higher than the TimeBeforeTheLoopStarted + HowLongItTakesToTypeaCharacter which is always going to be a second. How would you handle my problems? I've commented the game breaking part. std::vector<QString> hardware = user.getHardware(); QString CPU = hardware[0]; unsigned short Speed = 0; if(CPU == "OMG SingleCore 1.8GHZ"){ Speed = 2; } const short passwordLength = password.length(); /* It's equal to 16 */ int Time = passwordLength / Speed; double TypeSpeed = Time / passwordLength; time_t t = time(0); struct tm * now = localtime(&t); unsigned short EndTime = (now->tm_sec + Time) % 60; unsigned short CurrentTime = 0; short i = passwordLength - 1; do{ t = time(0); now = localtime(&t); CurrentTime = now->tm_sec; do{ t = time(0); now = localtime(&t); }while(now->tm_sec < CurrentTime + TypeSpeed); /* Highly flawed */ /* Do this while your integer value is under this double value */ QString tempPass = password; tempPass.chop(i); ui->lineEdit_2->setText(tempPass); i--; }while(CurrentTime != EndTime);

    Read the article

< Previous Page | 94 95 96 97 98 99 100 101 102 103 104 105  | Next Page >