Search Results

Search found 19635 results on 786 pages for 'materialized path pattern'.

Page 532/786 | < Previous Page | 528 529 530 531 532 533 534 535 536 537 538 539  | Next Page >

• Beginners guide to developing optimization software

  - by Florenc

  I am novice in "serious" programming i.e. applications that deal with real-life applications and software projects that go beyond school assignments. My interests include optimization, operations research, algorithms and lately i discovered how much I do like software design/development/engineering. I have already developed some simple desktop applications for some "famous" problems like TSP using heuristc approaches, a VRP solver (in progress) and so on. While developing this kind of software I actually used basic concepts taught at school such as object-orientation analysis and design. But, I found these courses rather elementary and quite boring (for my expectations). So I decided to go a little further and start developing "real" software (and this is where I realized how important and interesting software engineering/design is.) Now, here's my issue: I can not find a "study guide" for developing software of this kind. Currently, there are numerous resources out there (books, websites, tutorials) in designing and developing complex IS, web applications, smartphone apps but I can't find a book for example entitled "optimization software development". Definetly, someone could claim that "design patterns apply to software in general" but that's not my point. My point is that I could simply use my imagination for "simple" implementations, but what happens, when my imagination can not go further? In other words I'm looking for a guide/path to bridge the gap between: Mathematics-Algorithm Design-Software Engineering-Optimization-Software development

  Read the article

• In what fields do programming and Business Sciences intersect? [on hold]

  - by Alainus

  One note of clarification: I'm getting a lot of comments saying that this question is too personal, too relative, subjective, and that career-path questions get quickly deleted. This is not a question about me or my career. This question is just what the title says: What fields exist that converge programming and business. Now the question: I read this answer regarding off-topic questions, and I was afraid this might be, so I'll try to keep it general and helpful for others. Also, this one has a similar background but formulates a different question from it. I have a Business Administration degree, but I've programmed since I can remember, and it's been my only job for years. However, my problem is the same that the majority of "amateuressional" programmers have: - Incomplete knowledge of the fundamentals. - Anxiety to keep up. - Feeling of not making anything useful of "the other degree". - Afraid of finally becoming a jack of all trades (master of none). Which further studies (specific degrees or fields) exist that allow a person with a BS degree converge into a programming career, without having to sacrifice coding, allowing to further expand the knowledge of C.S. fundamentals, and also without completely sacrificing the first?

  Read the article

• duplicity can't find remote backup directory?

  - by leeand00

  Using my private key to do so, this command allows me to connect to /home/backupUser/backup just fine: $ sudo sftp -oPort=7843 [email protected]:backup However when I run duplicity, I get the following error: duplicity full --exclude ... / scp://backupUser:[email protected]:7843:/backup bash: [email protected]:7843./backup: No such file or directory I'm under the assumption that duplicity would interpret the /backup path as relative to the user's home directory. But since the above command didn't work, I also tried leaving off the / in the backup directory at the end of the command, i.e. duplicity full --exclude ... / scp://backupUser:[email protected]:7843:backup bash: [email protected]:7843:backup: command not found Is there something I'm missing here, like adding the passcode for the private key to make this command work?

  Read the article

• PyGTK/Quickly Add string to ListStore

  - by AllRadioisDead

  I'm trying to build an application that will prompt the user for a string, and then add that string to a Scrolling Listview object using quickly and PyGTK. I've been following this tutorial: http://developer.ubuntu.com/resources/app-developer-cookbook/multimedia/creating-a-simple-media-player/ When I hit the add button, the prompt comes up properly and I'm able to enter the string. The column appears correctly but the list ends up being blank. What am I doing wrong? import gettext from gettext import gettext as _ gettext.textdomain('spiderweb') from gi.repository import Gtk # pylint: disable=E0611 import logging logger = logging.getLogger('spiderweb') from spiderweb_lib import Window from spiderweb.AboutSpiderwebDialog import AboutSpiderwebDialog from spiderweb.PreferencesSpiderwebDialog import PreferencesSpiderwebDialog from quickly import prompts from quickly.widgets.dictionary_grid import DictionaryGrid import os # See spiderweb_lib.Window.py for more details about how this class works class SpiderwebWindow(Window): __gtype_name__ = "SpiderwebWindow" def finish_initializing(self, builder): # pylint: disable=E1002 """Set up the main window""" super(SpiderwebWindow, self).finish_initializing(builder) self.AboutDialog = AboutSpiderwebDialog self.PreferencesDialog = PreferencesSpiderwebDialog # Code for other initialization actions should be added here. self.supported_web_formats = [".net",".html", ".com"] def on_addbutton_clicked(self, widget, data=None): #let the user choose a path with the directory chooser response, string = prompts.string("Enter a string", "Please enter string:", "Sample Text") #make certain the user said ok before working if response == Gtk.ResponseType.OK: #make a list of the supported media files media_files = Gtk.ListStore(str) #add a dictionary to the list of media files media_files.append({"String":string}) #remove any children in scrolled window for c in self.ui.scrolledwindow1.get_children(): self.ui.scrolledwindow1.remove(c) #create the grid with list of dictionaries #only show the File column media_grid = DictionaryGrid(media_files, keys=["File"]) #show the grid, and add it to the scrolled window media_grid.show_all() self.ui.scrolledwindow1.add(media_grid)

  Read the article

• Make Gameobject Stand On Surface Facing Certain Direction

  - by Julian

  I want to make a biped character stand on any surface I click on. Surfaces have up vectors of any of positive or negative X,Y,Z. So imagine a cube with each face being a gameobject whose up vector pointing directly away from the cube. If my character is facing "forward" and I click on a surface which is to the left or right of me ( left or right walls), I want my character to now be standing on that surface but still be facing in the direction he initially was. If I click on a wall which is in the forward path of my character i want him to now be standing on that surface and his forward to now be what was once "up" relative to my character. Here is the code I am working with now. void Update() { if (Input.GetMouseButtonUp (0)) { RaycastHit hit; var ray = Camera.main.ScreenPointToRay(Input.mousePosition); if (Physics.Raycast(ray, out hit)) { Vector3 upVectBefore = transform.up; Vector3 forwardVectBefore = transform.forward; Quaternion rotationVectBefore = transform.rotation; Vector3 hitPosition = hit.transform.position; transform.position = hitPosition; float lookDifference = Vector3.Distance(hit.transform.up, forwardVectBefore); if(Vector3.Distance(hit.transform.up, upVectBefore) < .23) //Same normal { transform.rotation = rotationVectBefore; } else if(lookDifference > 1.412 && lookDifference <= 1.70607) //side wall { transform.up = hit.transform.up; transform.forward = forwardVectBefore; } else //head on wall { transform.up = hit.transform.up; transform.forward = upVectBefore; } } } } The first case "Same normal" works fine, however the other two do not work as I would like them to. Sometimes my character is laying down on the surface or on the wrong side of the surface. Does anyone know nice way of solving this problem?

  Read the article

• Can I set a hyperlink's display text from a document property?

  - by themel

  I'm trying to make a word document customizable through a document property that contains the base URL of all the links. I've managed to make the links themselves reference the document property like this: { HYPERLINK { QUOTE "http://{ DOCPROPERTY Host}/some/path" } } Changing the document property and updating the files makes the hyperlinks point to the correct URL. However, visually, nothing changes - the old URL is still shown as the display text of the hyperlink. Is there a way to make this work? Microsoft docs helpfully state You can edit the display text for the field by typing over it. but I can't figure out how that is supposed to work - even if I manually type over the hyperlink, it includes the edits in the field code instead of adjusting the display text. Currently attempting in Word 2002, but 2010 also available.

  Read the article

• Command to see all Windows commands

  - by open_sourse

  When I type help in windows command line, it lists a whole bunch of commands. However I find that there is a whole set of commands that do not appear in this list, for e.g. many networking commands such as ping, tracert, arp, netstat, net etc. I am sure that there is also a whole bunch of non-networking command which is also not listed. So my question is this. Why are these additional commands not shown in help? Is there a subset/group of commands only that help shows? Is there any command/method to list all the commands that can be executed in windows? (I am not talking about additional .exes that get added to path when some new software is installed..)

  Read the article

• Loading images in XNA 4.0; "Cannot Open File" Problems

  - by user32623

  Okay, I'm writing a game in C#/XNA 4.0 and am utterly stumped at my current juncture: Sprite animation. I understand how it works and have all the code in place, but my ContentLoader won't open my file... Basically, my directory looks like this: //WindowsGame1 - "Game1.cs" - //Classes - "NPC.cs" - Content Reference - //Images - "Monster.png" Inside my NPC class, I have all the essential drawing functions, i.e. LoadContent, Draw, Update. And I can get the game to find the correct file and attempt to open it, but when it tries, it throws an exception and tells me it can't open the file. This is how my code in my NPC class looks: Texture2D NPCImage; Vector2 NPCPosition; Animation NPCAnimation = new Animation(); public void Initialize() { NPCAnimation.Initialize(NPCPosition, new Vector2(4, 4)); } public void LoadContent(ContentManager Content) { NPCImage = Content.Load<Texture2D>("_InsertImageFilePathHere_"); NPCAnimation.AnimationImage = NPCImage; } The rest of the code is irrelevant at this point because I can't even get the image to load. I think it might have to do with a directory problem, but I also know little to nothing about spriting or working with images or animations in my code. Any help is appreciated. Not sure if I provided enough information here, so let me know if more is needed! Also, what would be the correct way to direct that Content.Load to Monster.png given the current directory situation? Right now I just have it using the full path from the C:// drive. Thanks in advance!

  Read the article

• error while installing binutils in LFS

  - by user53347

  lfs:/mnt/lfs/sources/binutils-build$ ../binutils-2.15.94.0.2.2/configure \ --target=$LFS_TGT --prefix=/tools \ --disable-nls --disable-werror loading cache ./config.cache checking host system type... i686-pc-linux-gnuoldld checking target system type... i686-lfs-linux-gnu checking build system type... i686-pc-linux-gnuoldld checking for a BSD compatible install... /usr/bin/install -c checking whether ln works... yes checking whether ln -s works... yes checking for gcc... no checking for cc... no configure: error: no acceptable cc found in $PATH

  Read the article

• PASS Summit Preconference and Sessions

  - by Davide Mauri

  I’m very pleased to announce that I’ll be delivering a Pre-Conference at PASS Summit 2012. I’ll speak about Business Intelligence again (as I did in 2010) but this time I’ll focus only on Data Warehouse, since it’s big topic even alone. I’ll discuss not only what is a Data Warehouse, how it can be modeled and built, but also how it’s development can be approached using and Agile approach, bringing the experience I gathered in this field. Building the Agile Data Warehouse with SQL Server 2012 http://www.sqlpass.org/summit/2012/Sessions/SessionDetails.aspx?sid=2821 I’m sure you’ll like it, especially if you’re starting to create a BI Solution and you’re wondering what is a Data Warehouse, if it is still useful nowadays that everyone talks about Self-Service BI and In-Memory databases, and what’s the correct path to follow in order to have a successful project up and running. Beside this Preconference, I’ll also deliver a regular session, this time related to database administration, monitoring and tuning: DMVs: Power in Your Hands http://www.sqlpass.org/summit/2012/Sessions/SessionDetails.aspx?sid=3204 Here we’ll dive into the most useful DMVs, so that you’ll see how that can help in everyday management in order to discover, understand and optimze you SQL Server installation, from the server itself to the single query. See you there!!!!!

  Read the article

• Splitting Pygame functionality between classes or modules?

  - by sec_goat

  I am attempting to make my pygame application more modular so that different functionalities are split up into different classes and modules. I am having some trouble getting pygame to allow me to draw or load images in secondary classes when the display has been set and pygame.init() has been done in my main class. I have typically used C# and XNA to accomplish this sort of behavior, but this time I need to use python. How do I init pygame in class1, then create an instance of class2 which loads and converts() images. I have tried pygame.init() in class 2 but then it tells me no display mode has been set, when it has been set in class1. I am under the impression i do not wnat to create multiple pygame.displays as that gets problematic I am probably missing something pythonic and simple but I am not sure what. How do I create a Display class, init python and then have other modules do my work like loading images, fonts etc.? here is the simplest version of what I am doing: class1: def __init__(self): self.screen = pygame.display.set_mode((600,400)) self.imageLoader = class2() class2: def __init__(self): self.images = ['list of images'] def load_images(): self.images = os.listdir('./images/') #get all images in the images directory for img in self.images: #read all images in the directory and load them into pygame new_img = pygame.image.load(os.path.join('images', img)).convert() scale_img = pygame.transform.scale(new_img, (pygame.display.Info().current_w, pygame.display.Info().current_h)) self.images.append(scale_img) if __name__ == "__main__": c1 = class1() c1.imageLoader.load_images() Of course when it tries to load an convert the images it tells me pygame has not been initialized, so i throw in a pygame.init() in class2 ( i have heard it is safe to init multiple times) and then the error goes to pygame.error: No video mode has been set

  Read the article

• Use msysgit/"Git for Windows" to navigate Windows shortcuts?

  - by Darthfett

  I use msysgit on Windows to use git, but I often want to navigate through a Windows-style *.lnk shortcut. I typically manage my file structure through Windows' explorer, so using a different type of shortcut (such as creating hard or soft link in git) isn't feasible. How would I navigate through this type of shortcut? For example: PCUser@PCName ~ $ cd Desktop PCUser@PCName ~/Desktop $ ls Scripts.lnk PCUser@PCName ~/Desktop $ cd Scripts.lnk sh.exe": cd: Scripts.lnk: Not a directory Is it possible to change this behavior, so that instead of getting an error, it just goes to the location of the directory? Alternatively, is there a command to get the path in a *.lnk file?

  Read the article

• Assigning a script to a keystroke to toggle touchpad

  - by sodiumnitrate

  Since my default sony vaio shortcuts don't completely work in Ubuntu 12.04, I'd like to assign a script to Fn + F1, which toggles the touchpad on and off, so that the cursor would stop moving while I'm typing. Since I use a mouse and rarely need to use the touchpad, I don't want to use "disable touchpad while writing", which doesn't really seem to work anyway. I figured that using a script with the following command (this works, but I have to open up a terminal each time): xinput set-prop 12 "Device Enabled" 0 I have two problems at this point. One is that I don't know how to write this script so that it will toggle it off if it is on, and on if it is off. I know I should use an if statement but I don't know what value I should be checking to see if it is on or off. The second one is that I am having problems creating a new shortcut. I use System Settings - Keyboard - Shortcuts. I tried to add, to custom shortcuts, a new one by clicking the '+' sign. I named it Toggle Touchpad, and added the path to the executable script with the line above, by typing /home/irem/.toggletouchpad I have made it an executable with chmod. The problem is that when I click apply, and then click back on it to define the keystroke, it re-opens the dialogue. I cannot define new keys. (It says disabled on the right column of the entry). I have also tried xbindkeys, which almost constantly crashes. I'd prefer the system settings, if I can set the shortcut. I'd appreciate if anyone can help. Thanks.

  Read the article

• configure vpn so that it is not the preferred route

  - by pstanton

  Hi all, I recently re-installed XP on my PC. I had a vpn set up on the old system and remember being advised to change one setting so that it wasn't the preferred route for all network traffic. This was ideal as only connections to the target network would be made through the vpn and all normal traffic would go through the regular path unmolested. i remember thinking "why isn't this the default setting!?". now i've formatted my drive and lost the config for that vpn (besides host, username, passwd). does anyone know of the setting i'm referring to? thanks, paul.

  Read the article

• HTML Tidy in NetBeans IDE

  - by Geertjan

  First step in integrating HTML Tidy (via its JTidy implementation) into NetBeans IDE: The reason why I started doing this is because I want to integrate this into the pluggable analyzer functionality of NetBeans IDE that I recently blogged about, i.e., where the FindBugs functionality is found. So a logical first step is to get it working in an Action class, after which I can port it into the analyzer infrastructure: import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.IOException; import java.io.PrintWriter; import java.io.StringWriter; import org.openide.awt.ActionID; import org.openide.awt.ActionReference; import org.openide.awt.ActionReferences; import org.openide.awt.ActionRegistration; import org.openide.cookies.EditorCookie; import org.openide.cookies.LineCookie; import org.openide.loaders.DataObject; import org.openide.text.Line; import org.openide.text.Line.ShowOpenType; import org.openide.util.Exceptions; import org.openide.util.NbBundle.Messages; import org.openide.windows.IOProvider; import org.openide.windows.InputOutput; import org.openide.windows.OutputEvent; import org.openide.windows.OutputListener; import org.openide.windows.OutputWriter; import org.w3c.tidy.Tidy; @ActionID(     category = "Tools", id = "org.jtidy.TidyAction") @ActionRegistration(     displayName = "#CTL_TidyAction") @ActionReferences({     @ActionReference(path = "Loaders/text/html/Actions", position = 150),     @ActionReference(path = "Editors/text/html/Popup", position = 750) }) @Messages("CTL_TidyAction=Run HTML Tidy") public final class TidyAction implements ActionListener {     private final DataObject context;     private final OutputWriter writer;     private EditorCookie ec = null;     public TidyAction(DataObject context) {         this.context = context;         ec = context.getLookup().lookup(org.openide.cookies.EditorCookie.class);         InputOutput io = IOProvider.getDefault().getIO("HTML Tidy", false);         io.select();         writer = io.getOut();     }     @Override     public void actionPerformed(ActionEvent ev) {         Tidy tidy = new Tidy();         try {             writer.reset();             StringWriter stringWriter = new StringWriter();             PrintWriter errorWriter = new PrintWriter(stringWriter);             tidy.setErrout(errorWriter);             tidy.parse(context.getPrimaryFile().getInputStream(), System.out);             String[] split = stringWriter.toString().split("\n");             for (final String string : split) {                 final int end = string.indexOf(" c");                 if (string.startsWith("line")) {                     writer.println(string, new OutputListener() {                         @Override                         public void outputLineAction(OutputEvent oe) {                             LineCookie lc = context.getLookup().lookup(LineCookie.class);                             int lineNumber = Integer.parseInt(string.substring(0, end).replace("line ", ""));                             Line line = lc.getLineSet().getOriginal(lineNumber - 1);                             line.show(ShowOpenType.OPEN, Line.ShowVisibilityType.FOCUS);                         }                         @Override                         public void outputLineSelected(OutputEvent oe) {}                         @Override                         public void outputLineCleared(OutputEvent oe) {}                     });                 }             }         } catch (IOException ex) {             Exceptions.printStackTrace(ex);         }     } } The string parsing above is ugly but gets the job done for now. A problem integrating this into the pluggable analyzer functionality is the limitation of its scope. The analyzer lets you select one or more projects, or individual files, but not a folder. So it doesn't work on folders in the Favorites window, for example, which is where I'd like to apply HTML Tidy, across multiple folders via the analyzer functionality. That's a bit of a bummer that I'm hoping to get around somehow.

  Read the article

• Create Report in Microsoft Excel - Permissions Issue in Team Foundation Server 2010

  - by sammarcow

  I am trying to use the feature "Create a Report in Microsoft Excel" for Visual Studio TFS 2010. I am being prompted for a username and password in Excel for any given Team Project when right clicking the item "Active Tasks", selecting "Create a Report in Microsoft Excel," found in the following path within the Team Explorer pane, from Visual Studio 2010: 'Collection Name' | 'Project Name' | Work Items | Iteration 1 | Active Tasks I am a Team Project Administrator and Collection Administrator. I checked The SharePoint site: http :// 'serverName'/Reports/Pages/Folder.aspx and have full sitewide and project permissions on this site. I loaded SQL Server Management Studio on the machine running the instance of TFS (and also the SQL backend for TFS) and ensured that I had roles "serveradmin" and "sysadmin". How do I run this report? Specifically, what permissions are required?

  Read the article

• Connection String Incorrectly Formatted [migrated]

  - by Randy E

  I'm running into some issues. Every time I launch into debug mode and hit the "Create User" button, I'm getting an exception being thrown that is due to the Connection String either being in the wrong syntax or just wrong. Using Visual Studio 2010, project is .NET 3.5 with SQL 2008 Express. This is just a personal project that I'm testing some other things with, I know this generally isn't the recommended format but for a personal small project, I don't see the point in doing it any other way. The things I'm testing actually work :) Data Source=.\SQLEXPRESS;AttachDbFilename=|Data Directory|ASPAppDatabase.mdf;Integrated Security=True;User Instance=True That doesn't work. Data Source=.\SQLEXPRESS;AttachDbFilename="|Data Directory|ASPAppDatabase.mdf";Integrated Security=True;User Instance=True Neither does that. Data Source=.\SQLEXPRESS;AttachDbFilename='|Data Directory|ASPAppDatabase.mdf';Integrated Security=True;User Instance=True And again, neither does that :/ However, rather than using "|Data directory| if I use the full path to the local DB file it works just fine and no exception is thrown, and I can read and write as I need. And just to cover all my bases, here is the button click event that creates the User. protected void btnAddUser_Click(object sender, EventArgs e) { Membership.CreateUser(txtUserName.Text, txtPassword.Text); btnLogin_Click(sender, e); } So, what am I missing in regards to the |Data Directory|? Here is an example of the above not working correctly..taken directly from web.config. <add name="ASPAppDatabaseConnection" connectionString='Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|ASPAppDatabase.mdf;Integrated Security=True;User Instance=True'/>

  Read the article

• How do I run Munin plugins written in Ruby, using RVM?

  - by hlg

  Hi! I try to run some Munin plugins written in Ruby. I would like to use RVM, so Munin needs to know where to find Ruby. I tried to change the line calling munin-cron in the cron file as follows: */5 * * * * munin bash -c 'source /usr/local/lib/rvm && rvm 1.9.2@munin && /usr/bin/munin-cron' This leads to error messages in munin-node.log, saying /usr/bin/env: ruby: No such file or directory When I change the plugins' shebangs to the actual path of the Ruby executable it works, but the RVM environment should be set so that '/usr/bin/env ruby' works. It does when I execute the plugins as root. Any ideas?

  Read the article

• Unable to get to remote samba share

  - by tubaguy50035

  I have a remote VPS that I would like to setup samba on and only allow my IP access to it. I currently have in my smb.conf: [global] netbios name = apollo security = user encrypt passwords = true socket options = TCP_NODELAY printing = bsd log level = 3 log file = /var/log/samba/log/%m debug timestamp = yes max log size = 100 [hosting] path = /hosting/ comment = Hosting Folder browseable = yes read only = yes guest account = yes valid users = nick I have the ports (137,138,139,445) open in iptables (they're open to everyone right now while I debug) and I see nothing in the syslog about iptables blocking my requests. When I try to open a file browser to my address \\ipaddress, it hangs for a good thirty seconds, and then opens a log in box. I enter my user name and password for the server, hit okay. It then opens the same box, I enter my credentials again and hit enter. Windows then tells me it could not connect. My user account is added to Samba already. Anybody have any suggestions what I can do to get this working?

  Read the article

• Asynchrony in C# 5 (Part II)

  - by javarg

  This article is a continuation of the series of asynchronous features included in the new Async CTP preview for next versions of C# and VB. Check out Part I for more information. So, let’s continue with TPL Dataflow: Asynchronous functions TPL Dataflow Task based asynchronous Pattern Part II: TPL Dataflow Definition (by quote of Async CTP doc): “TPL Dataflow (TDF) is a new .NET library for building concurrent applications. It promotes actor/agent-oriented designs through primitives for in-process message passing, dataflow, and pipelining. TDF builds upon the APIs and scheduling infrastructure provided by the Task Parallel Library (TPL) in .NET 4, and integrates with the language support for asynchrony provided by C#, Visual Basic, and F#.” This means: data manipulation processed asynchronously. “TPL Dataflow is focused on providing building blocks for message passing and parallelizing CPU- and I/O-intensive applications”. Data manipulation is another hot area when designing asynchronous and parallel applications: how do you sync data access in a parallel environment? how do you avoid concurrency issues? how do you notify when data is available? how do you control how much data is waiting to be consumed? etc.  Dataflow Blocks TDF provides data and action processing blocks. Imagine having preconfigured data processing pipelines to choose from, depending on the type of behavior you want. The most basic block is the BufferBlock<T>, which provides an storage for some kind of data (instances of <T>). So, let’s review data processing blocks available. Blocks a categorized into three groups: Buffering Blocks Executor Blocks Joining Blocks Think of them as electronic circuitry components :).. 1. BufferBlock<T>: it is a FIFO (First in First Out) queue. You can Post data to it and then Receive it synchronously or asynchronously. It synchronizes data consumption for only one receiver at a time (you can have many receivers but only one will actually process it). 2. BroadcastBlock<T>: same FIFO queue for messages (instances of <T>) but link the receiving event to all consumers (it makes the data available for consumption to N number of consumers). The developer can provide a function to make a copy of the data if necessary. 3. WriteOnceBlock<T>: it stores only one value and once it’s been set, it can never be replaced or overwritten again (immutable after being set). As with BroadcastBlock<T>, all consumers can obtain a copy of the value. 4. ActionBlock<TInput>: this executor block allows us to define an operation to be executed when posting data to the queue. Thus, we must pass in a delegate/lambda when creating the block. Posting data will result in an execution of the delegate for each data in the queue. You could also specify how many parallel executions to allow (degree of parallelism). 5. TransformBlock<TInput, TOutput>: this is an executor block designed to transform each input, that is way it defines an output parameter. It ensures messages are processed and delivered in order. 6. TransformManyBlock<TInput, TOutput>: similar to TransformBlock but produces one or more outputs from each input. 7. BatchBlock<T>: combines N single items into one batch item (it buffers and batches inputs). 8. JoinBlock<T1, T2, …>: it generates tuples from all inputs (it aggregates inputs). Inputs could be of any type you want (T1, T2, etc.). 9. BatchJoinBlock<T1, T2, …>: aggregates tuples of collections. It generates collections for each type of input and then creates a tuple to contain each collection (Tuple<IList<T1>, IList<T2>>). Next time I will show some examples of usage for each TDF block. * Images taken from Microsoft’s Async CTP documentation.

  Read the article

• 500 internal server error

  - by Rockr

  I am facing 500.0 Internal server quite frequently with my website. The error details are given below. HTTP Error 500.0 - Internal Server Error C:\PHP\php-cgi.exe - The FastCGI process exceeded configured activity timeout Module FastCgiModule Notification ExecuteRequestHandler Handler PHP_via_FastCGI Error Code 0x80070102 Requested URL http://mydomain.com:80/index.php Physical Path C:\HostingSpaces\coderefl\mydomain.com\wwwroot\index.php Logon Method Anonymous Logon User Anonymous When I contacted the support team, they're saying that my site is making heavy SQL Queries. I am not sure how to debug this. But my site is very small and the database is optimized. I'm running wordpress as platform. How to resolve this issue?

  Read the article

• Install Rails on linux [migrated]

  - by Jseb

  I am trying to install Ruby on Rails. and i have followed the following link for the install https://www.digitalocean.com/community/articles/how-to-install-ruby-on-rails-on-ubuntu-12-04-lts-precise-pangolin-with-rvm. This link was helpful i was able to run it, and everything, however as soon has i restarted the computer i then go into my apps and run it again with rails s and this message occurs. The program 'rails' is currently not installed. You can install it by typing: sudo apt-get install rails But work before, what should i do, do i need to set the path of somesort?? I am not that great in linux so bear with me. I am using linux ubuntu 12.04 desktop and my user is john Thanks in advance

  Read the article

• Can I optimize this mod_wsgi / apache file better?

  - by tomwolber

  I am new to Django/Python/ mod_wsgi, and I was wondering if I could optimize this file to reduce memory usage: ServerRoot "/home/<foo>/webapps/django_wsgi/apache2" LoadModule dir_module modules/mod_dir.so LoadModule env_module modules/mod_env.so LoadModule log_config_module modules/mod_log_config.so LoadModule mime_module modules/mod_mime.so LoadModule rewrite_module modules/mod_rewrite.so LoadModule setenvif_module modules/mod_setenvif.so LoadModule wsgi_module modules/mod_wsgi.so LogFormat "%{X-Forwarded-For}i %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined CustomLog /home/<foo>/logs/user/access_django_wsgi.log combined ErrorLog /home/<foo>/logs/user/error_django_wsgi.log KeepAlive Off Listen 12345 MaxSpareThreads 3 MinSpareThreads 1 MaxClients 5 MaxRequestsPerChild 300 ServerLimit 4 HostnameLookups Off SetEnvIf X-Forwarded-SSL on HTTPS=1 ThreadsPerChild 5 WSGIDaemonProcess django_wsgi processes=5 python-path=/home/<foo>/webapps/django_wsgi:/home/<foo>/webapps/django_wsgi/lib/python2.6 threads=1 WSGIPythonPath /home/<foo>/webapps/django_wsgi:/home/<foo>/webapps/django_wsgi/lib/python2.6 WSGIScriptAlias /auctions /home/<foo>/webapps/django_wsgi/auctions.wsgi WSGIScriptAlias /achievers /home/<foo>/webapps/django_wsgi/achievers.wsgi

  Read the article

• How to get Nvidia graphics working on Sony Z laptop?

  - by projectshave

  I have an older Sony VAIO Z 590 laptop with switchable graphics between Intel and Nvidia GeForce 9300M. It is NOT Optimus. I did a clean install of Ubuntu 12.04. Everything works, but it's using Unity 2D with the Intel drivers. I've tried loading the Nvidia drivers from "Additional Drivers", but it says "this driver is activated but not currently in use". When I run "nvidia-settings", an error window pops up to say "You do not appear to be using the NVIDIA X drivers." "lspci" shows both graphics cards. Let me know if I should add more info. How do I get the Nvidia graphics and Unity 3D working? More info: $ lshw -short -class display H/W path Device Class Description ============================================== /0/100/1/0 display G98 [GeForce 9300M GS] /0/100/2 display Mobile 4 Series Chipset Integrated Graphics C $ glxinfo name of display: :0 Xlib: extension "GLX" missing on display ":0". Xlib: extension "GLX" missing on display ":0". Xlib: extension "GLX" missing on display ":0". Xlib: extension "GLX" missing on display ":0". Xlib: extension "GLX" missing on display ":0". Error: couldn't find RGB GLX visual or fbconfig Xlib: extension "GLX" missing on display ":0". Xlib: extension "GLX" missing on display ":0". Xlib: extension "GLX" missing on display ":0". Xlib: extension "GLX" missing on display ":0". Xlib: extension "GLX" missing on display ":0". Xlib: extension "GLX" missing on display ":0". Xlib: extension "GLX" missing on display ":0". Excerpts from Xorg.0.log: [ 16.373] (II) LoadModule: "glx" [ 16.373] (II) Loading /usr/lib/x86_64-linux-gnu/xorg/extra-modules/libglx.so [ 16.386] (II) Module glx: vendor="NVIDIA Corporation" [ 16.386] compiled for 4.0.2, module version = 1.0.0 [ 16.386] Module class: X.Org Server Extension [ 16.386] (II) NVIDIA GLX Module 295.49 Tue May 1 00:09:10 PDT 2012 [ 16.608] (II) NVIDIA dlloader X Driver 295.49 Mon Apr 30 23:48:24 PDT 2012 [ 16.608] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs [ 17.693] (EE) Failed to initialize GLX extension (Compatible NVIDIA X driver not found)

  Read the article

• Software Center Freezing on Xubuntu 12.10

  - by AC3

  Whenever I open Software center I get this error: 012-12-12 16:19:29,196 - softwarecenter.fixme - WARNING - logs to the root logger: '('/usr/lib/python2.7/dist-packages/dbus/proxies.py', 410, '_introspect_error_handler')' 2012-12-12 16:19:29,196 - dbus.proxies - ERROR - Introspect error on :1.74:/com/ubuntu/Softwarecenter: dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken. 2012-12-12 16:19:54,713 - softwarecenter.ui.gtk3.app - INFO - setting up proxy 'None' 2012-12-12 16:19:54,816 - softwarecenter.db.database - INFO - open() database: path=None use_axi=True use_agent=True 2012-12-12 16:19:55,705 - softwarecenter.region - WARNING - failed to use geoclue: 'org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.Geoclue.Master was not provided by any .service files' 2012-12-12 16:19:56,575 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file 2012-12-12 16:19:56,592 - softwarecenter.fixme - WARNING - logs to the root logger: '('/usr/lib/python2.7/dist-packages/gi/importer.py', 51, 'find_module')' 2012-12-12 16:19:56,592 - root - ERROR - Could not find any typelib for LaunchpadIntegration 2012-12-12 16:19:56,910 - softwarecenter.ui.gtk3.app - INFO - show_available_packages: search_text is '', app is None. 2012-12-12 16:19:56,935 - softwarecenter.db.pkginfo_impl.aptcache - INFO - aptcache.open() Not sure if it is a bug or not, have uninstalled and reinstalled the program already with synaptic. Very little experience with linux and any help will be appreciated

  Read the article

< Previous Page | 528 529 530 531 532 533 534 535 536 537 538 539  | Next Page >