Search Results

Search found 11972 results on 479 pages for 'writing'.

Page 273/479 | < Previous Page | 269 270 271 272 273 274 275 276 277 278 279 280  | Next Page >

• Avoid copying of data between user and kernel space and vice-versa

  - by bala1486

  Hello, I am developing a active messaging protocol for parallel computation that replaces TCP/IP. My goal is to decrease the latency of a packet. Since the environment is a LAN, i can replace TCP/IP with simpler protocol to reduce the packet latency. I am not writing any device driver and i am just trying to replace the TCP/IP stack with something simpler. Now I wanted to avoid copying of a packet's data from user space to kernel space and vice-versa. I heard of the mmap(). Is it the best way to do this? If yes, it will be nice if you can give links to some examples. I am a linux newbie and i really appreciate your help.. Thank you... Thanks, Bala

  Read the article

• Help with grasping (INNER?) JOIN

  - by Greenie

  I'm having trouble building a query. I can do what I want in 3 different queries. SELECT id FROM table1 WHERE url LIKE '%/$downloadfile' put that in $url_id SELECT item_id FROM table2 WHERE rel_id = '$url_id'" put that in $item_id SELECT rel_id FROM table2 WHERE rel_id = '$item_id' AND field_id = '42'" put that in $user_id But from reading examples on joins and inner joins I think there's a more elegant way. I cant wrap my brain around writing a better query (but would like to) I can describe how it should go: table1 fields: id, url table2 fields item_id, rel_id, field_id I know the last part of table1.url (LIKE '%/$filename') with that I select table1.id. table1.id is equal to one entry in table2.rel_id. So get that and select the table2.item_id. In table2 there is another entry which has the same table2.item_id and it will have a table2.field_id = '42' And finally the value I need is the table2.rel_id where the table2.field_id was 42. I will fetch that value and put it in $user_id Can this be done with one query using joins/inner joins?

  Read the article

• Can someone describe some DI terms to me?

  - by SoBeNoFear

  I'm in the process of writing a DI framework for PHP 5, and I've been trying to find the 'official' definitions of some words in relation to dependency injection. Some of these words are 'context' and 'lifecycle'. And also, what would I call the object that gets created/injected? Finally, what is the difference between components and services, and which term (if either) should I call the objects that can be injected? I've read Martin Fowler's article and looked through other DI frameworks (Phemto, Spring, Google Guice, Xyster, etc.), but I want to know what you think. Thanks!

  Read the article

• How can I expose a service bus by a wcf service to be consumed by a silverlight client

  - by illdev

  In a Silverlight application, instead of consuming and writing (wcf) wrappers around messages that finally get sent to the bus, I want to send use my message bus as directly as possible. My idea was to expose the service bus directly as a wcf service, or, in other terms, I want to bidirectionally pub/sub over the wire. Has this been done already? Is bi-directionality doable at all? After all, we are (are we restricted to that?) in the http domain? Lots of questions. Some head start would be greatly appreciated! I am in .NET land, with using Rhino Service Bus, but the pattern should apply to different platforms.

  Read the article

• Is there a tool for detecting Visual Studio projects with duplicate GUIDs?

  - by sharptooth

  When creating new Visual Studio C++ projects there're two ways: either run the wizard and then painfully change all the necessary settings in the project or just copy and existing project, rename everything there and add files into it. The second variant is great except that the .vcproj file stores a project GUID. This GUID is used to track project dependencies and the startup project when two or more projects are in one solution. If any two projects in one solution have identical GUIDs problems can arise - dependencies are lost and the startup prject is reset on next solution reload. Clearly there's a need for a tool that would scan the filesystem subtree and detect projects with identical GUIDs here. Before I start writing one ... is there a ready tool for that?

  Read the article

• Redirecting the response from a filter throws an IllegalStateException

  - by Ritesh M Nayak

  I am writing a filter that will handle all authentication related tasks. My filter is a standard servlet filter as shown below @Override public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException { UserSession attribute = (UserSession)request.getSession().getAttribute("user_session_key"); if(attribute!=null && attribute.isValid()) { //proceed as usual, chain.doFilter(req, res); return; } else { //means the user is not authenticated, so we must redirect him/her to the login page ((HttpServletResponse)res).sendRedirect("loginpage"); return; } } But when I do this, I get an IllegalStateException thrown by Tomcat's ResponseFacade. How do I acheive this in a filter. I read in other SO threads that in TOmcat this is a problem as the response object is already commited. How do I get past this ?

  Read the article

• How do I truncate a .NET string?

  - by Steve Guidi

  I apologize for such a question that likely has a trivial solution, but I strangely could not find a concise API for this problem. Essentially, I would like to truncate a string such that it its length is not longer than a given value. I am writing to a database table and want to ensure that the values I write meet the constraint of the column's datatype. For instance, it would be nice if I could write the following: string NormalizeLength(string value, int maxLength) { return value.Substring(0, maxLength); } Unfortunately, this raises an exception because maxLength exceeds the string boundaries. Of course, I could write a function like the following, but I was hoping that something like this already exists. string NormalizeLength(string value, int maxLength) { return value.Length <= maxLength ? value : value.Substring(0, maxLength); } Where is the elusive API that performs this task? Is there one?

  Read the article

• Javascript string syntax to write SQL

  - by sebastien leblanc

  I am writing an SQL query as a Javascript string like that: SQLdetail = 'SELECT [Avis SAP], Avis.[Ordre SAP], [Date Appel], [Heur Appel], Client_List![Code Client], [Numero Passerelle], [Designation Appel], Ordre![Metier], Ordre!Repercussion, Ordre!Objet, Ordre![Profil Panne], Ordre!Cause, Ordre![Sommaire Correctif], Ordre![Statut]' SQLdetail += ' FROM (Avis' SQLdetail += ' LEFT JOIN Client_List ON Avis.[Numero Client] = Client_List.[Numero Client])' SQLdetail += ' LEFT JOIN Ordre ON Avis.[Ordre SAP] = Ordre.[Ordre SAP] WHERE Avis.[Date Appel] BETWEEN #' & DateOne & '# AND #' & DateTwo & '#;' alert('SQLdetail:' + SQLdetail) and the last SQLdetail += somehow returns "0". Am I missing something in the syntax that just turns the whole string to a 0?

  Read the article

• Python command line UI

  - by hdx

  Hey guys/gals I'm writing a python script that fixes some duplicate issues on my database. I would like to display some progress status to the users, currently I just print it like this: print "Merged " + str(idx) + " out of " + str(totalCount); The problem is that it prints that in a new line for every record and that does not look so good :) I'd like to either always print the string above on the same line on the screen or use some smart widget that displays it in some sort of progress bar. I intent to run this on the command line, any suggestions will be much appreciated.

  Read the article

• IHTMLTxtRange.execCommand("Copy",false,null) fails due to IE settings

  - by srirambalaji-s

  We have a .Net application that is used for editing/rendering customized HTML documents. It is hosted in IE using the AxSHDocVw.AxWebBrowser controls. We proceed with navigating to "about:blank" page initially then we change the Document by writing our custom values into it. The problem we are facing is the call to IHTMLTxtRange.execCommand("Copy",false,null) is failing if we don't enable the IE Security Settings in the Internet Security zone (Scripting-Allow Programmatic Access to Clipboard ). In order to bypass the security setting ,I tried to point to a local html file initially while navigating. But this fails as soon as I modify the Document. I want to use the IHTMLTxtRange.execCommand("Copy",false,null) command so that I can customize our Copy/Paste operations. Is there any other way I can do this. Please share your ideas inorder to overcome this situation. Thanks. Sriram

  Read the article

• How can I force input to uppercase in an asp.net textbox?

  - by Aheho

  I'm writing an asp.net application. I have a textbox on a webform and I want to force whatever the user types to upper case. I'd like to do this on the front end. You should also note that there is a validation control on this textbox, so I want to make sure the solution doesn't interfere with the asp.net validation. Clarification: It appears that the CSS text-tranform makes the user input appear in uppercase, however under the hood, it's still lower case as the validation control fails. You see, my validation control checks to see if a valid state code is entered, however the regex expression I"m using only works with uppercase characters.

  Read the article

• GUI Control For Audio Presentation

  - by Boris

  I need GUI control for audio file presentation. The language is not very important but it should run on windows platform. I should be able to :- load the file play the sound put and move markers across the audio bar. it would be nice if it can load itself from RTP wireshark captures (and not wav files). An example may be seen in audacity (may be someone even had an experience extracting it from there). Writing nyquist scripts in audacity is not a good option because I have to operate on RTP captures and not on raw sound samples. Another example of such control is wireshark RTP analyzer. Any advise?

  Read the article

• Close resources before exiting JFrame and TCP communication in Java

  - by Oz Molaim

  1. I'm writing a chat based application on TCP communication. I'm using NetBeans and I want to add functionality to the default EXIT_ON_CLOSE when exiting JFrame. The reason of course is because I want to clean resources and end threads safely. How can I call a method that clear resources and only then close the JFrame safely and end the process. 2. I need to implement the server side. The server has List/HashMap/Queue of 'Socket' with their chat nick-names. Is there any simple design pattern to do it correctly because I don't want to re-invent the wheel. thanks.

  Read the article

• when to use strncpy or memmove

  - by robUK

  Hello, gcc 4.4.4 c89 I have always used strncpy to copy strings. I have never really used memmove or memcpy very much. However, I am just wondering when would you decide whether to use strncpy, memmove, or memcpy? The code I am writing is for a client/server application. In the documentation they use bcopy. However, could I do the same with the others? bcopy((char*)server->h_addr, (char*)&serv_addr.sin_addr.s_addr, server->h_length); Many thanks,

  Read the article

• How do i return a StringWriter When I cant Clone it?

  - by acidzombie24

  My code looks like the below. Obviously i cant write 'ok' because the object has been disposed. I cant do return sw.Clone() bc clone doesnt exist. If i dont use a using then at any point between = new and return (like iterating and writing to the object as my example doesnt do) can have an exception and thus not disposing the object. Am i to define sw outside of a try block and check if its null then dispose in a catch block? That seems like a bit of excessive work. Is there a better way? is that the only way? static void func1() { using (var sw = func2()) { sw.WriteLine("Ok"); } } static StringWriter func2() { using (var sw = new StringWriter()) { return sw; } }

  Read the article

• what's the UNC path for local computer from a remote machine ?

  - by KaluSingh Gabbar

  I am writing a small utility program in IronPython to install applications on remote machine using managementclass which uses WMI. Now, the script would install an application on Machine_B from Machine_A, it works fine as long as you have the msi file on the local drive of the Target machine (Machine_B, in this case). I want to be able to do same thing with .msi file being on the Host (Machine_A) machine. network_scope = r"\\%Machine_B\root\cimv2" scope = ManagementScope(network_scope, options) scope.Connect() mp = ManagementPath("Win32_Product") ogo = ObjectGetOptions() mc = ManagementClass(scope, mp, ogo) inParams = mc.GetMethodParameters ("Install") inParams["PackageLocation"] = r"C:\installs\python-3.1.1.msi" inParams["AllUsers"] = True retVal = mc.InvokeMethod ("Install", inParams, None) print retVal ["ReturnValue"].ToString() PROBLEM : [Machine A] --- Where I am running the script, and want to host the .msi file [Machine B] --- where I want to install the application So, How can I define the UNC path for local machine ? what will be inParams["PackageLocation"] = ??

  Read the article

• Which event handler to use to record leaving page - onunload or onbeforeunload?

  - by symcbean

  Hi all, Having not any answers to my previous questions about using javascript to measure page turn times, I'm going to start writing my own code (!). To measure the length of tie it takes, I'm proposing dropping a cookie containing a timestamp when the user browses away from a page, then in a subsequent page, comparing that time with 'now' and sending back a request to a URL which will log the interval. It seems that there are 2 possible handlers I could associate the first block of code with - the onunload() handler or the onbeforeunload()? It's more important that it fail silently on browsers with no/broken support for the handler, than it be portable across every possible browser. Any pointers? Gotchas? TIA C.

  Read the article

• XmlTextWriter.WriteFullEndElement tags on the same line

  - by Apeksha

  I am using an XMLTextWriter to create an XML document dynamically (in VB.Net). I want empty tags to appear like this - <Tag></Tag> and not this - <Tag /> So, I am using WriteFullEndElement to end the element tag. But it is writing out the tag as - <Tag> </Tag> i.e. with a newline character between the tags. The web service reading this XML rejects it due to the newline character. How do I avoid the newline, and have both the start and end tags on the same line?

  Read the article

• Will GTK's pango and cairo work well in Cocoa and MFC applications.

  - by Lothar

  I'm writing a GUI program and decided to go native on all platforms. But for all the stuff i need to draw myself i would like to use the same drawing routines because font and unicode handling is so difficult and complex. Do you see any negative points in useing Pango/Cairo. Well on MacOSX i havent succeded installing Pango/Cairo yet. Looks like a bad Omen. I would also like to hear about the performance penality. The first time i looked at Pango i thought, yes thats the reason why Software is still getting despite better hardware.

  Read the article

• using php to check if xml is atom or rss

  - by guest86

  i'm writing a php code which has to determine if given xml is in "atom" or "rss" format. After observing atom and rss xml files, i decided classify xml based on a root element. If root element is "<feed" it's an atom xml. If it's "<rss" it's not an atom. How can i perform that check using DOM? So far i have: $dom->loadXML($resp); $feed = $dom->getElementsByTagName("feed"); but it's not working quite right....

  Read the article

• crunching multiple js files during development

  - by Yaron Naveh

  I'm writing a backbone.js app. I have multiple js, css and html template files. I also have a script to crunch them into a single file so it is faster to download. How should I work during development: Add a listener to the file system and after every change compile the files so I can see it in a browser. This implies a 1-2 seconds overhead before I can see what I did, which is annoying for html fine-tuning. Somehow browse using the multiple files during development and only crunch before going to production. This means I need to have a separate index.html for dev and prod. What's your take?

  Read the article

• Could Grand Central Dispatch (`libdispatch`) ever be available on Windows?

  - by elliottcable

  I’m looking into multithreading, and GCD seems like a much better option than manually writing a solution using pthread.h and pthreads-win32. However, although it looks like libdispatch is either working on, or soon going to be working on, most newer POSIX-compatible systems… I have to ask, what about Windows? What are the chances of libdispatch being ported to Windows? What are the barriers preventing that from happening? If it came down to it, what would I need to do to preform that portage?

  Read the article

• Use of LOC to determine project size

  - by acidzombie24

  How many lines of code (LOC) does it take to be considered a large project? How about for just one person writing it? I know this metric is questionable, but there is a significant difference, for a single developer, between 1k and 10k LOC. I typically use space for readability, especially for SQL statements, and I try to reduce the amount of LOC for maintenance purpose to follow as many best practice as i can. For example, I created a unified diff of the code I modified today, and it was over 1k LOC (including comments and blank lines). Is "modified LOC" a better metric? I have ~2k LOC, so it's surprising I modified 1k. I guess rewriting counts as both a deletion and addition which doubles the stats.

  Read the article

• How can one extract rdf:about or rdf:ID properties from triples using SPARKQL?

  - by lennyks

  It seemed a trivial matter at the beginning but so far I had not managed to get unique identifier for a given resource using SPARKQL. What I mean is given, let say, rdf:Description rdf:about="http://..." and then some properties identifying this resource, what I want to do is to first find this very resource and then retrieve all the triples given some uri. I have tried naive approaches by writing statements in a WHERE clause such as ?x rdf:about ?y and ?x rdfs:about ?y. I hope I am being precise.

  Read the article

• Scala model-view-presenter, traits

  - by Ralph

  I am a fan of Martin Fowler's (deprecated) model-view-presenter pattern. I am writing a Scala view class containing several button classes. I would like to include methods to set the action properties of the buttons, to be called by the presenter. A typical code fragment looks like this: private val aButton = new JButton def setAButtonAction(action: Action): Unit = { aButton.setAction(action) } This code is repeated for each button. If Java/Scala had the C preprocessor, I would create a macro to generate this code, given the button name (no lectures on the evils of the C preprocessor, please). This code is obviously very verbose and repetitive. Is there any better way way to do this in Scala, perhaps using traits? Please hold the lectures about scala.swing. I looking for a general pattern here.

  Read the article

< Previous Page | 269 270 271 272 273 274 275 276 277 278 279 280  | Next Page >