Daily Archives

Articles indexed Friday March 19 2010

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

Page 78/124 | < Previous Page | 74 75 76 77 78 79 80 81 82 83 84 85  | Next Page >

  • XML: Process large data

    - by Atmocreations
    Hello What XML-parser do you recommend for the following purpose: The XML-file (formatted, containing whitespaces) is around 800 MB. It mostly contains three types of tag (let's call them n, w and r). They have an attribute called id which i'd have to search for, as fast as possible. Removing attributes I don't need could save around 30%, maybe a bit more. First part for optimizing the second part: Is there any good tool (command line linux and windows if possible) to easily remove unused attributes in certain tags? I know that XSLT could be used. Or are there any easy alternatives? Also, I could split it into three files, one for each tag to gain speed for later parsing... Speed is not too important for this preparation of the data, of course it would be nice when it took rather minutes than hours. Second part: Once I have the data prepared, be it shortened or not, I should be able to search for the ID-attribute I was mentioning, this being time-critical. Estimations using wc -l tell me that there are around 3M N-tags and around 418K W-tags. The latter ones can contain up to approximately 20 subtags each. W-Tags also contain some, but they would be stripped away. "All I have to do" is navigating between tags containing certain id-attributes. Some tags have references to other id's, therefore giving me a tree, maybe even a graph. The original data is big (as mentioned), but the resultset shouldn't be too big as I only have to pick out certain elements. Now the question: What XML parsing library should I use for this kind of processing? I would use Java 6 in a first instance, with having in mind to be porting it to BlackBerry. Might it be useful to just create a flat file indexing the id's and pointing to an offset in the file? Is it even necessary to do the optimizations mentioned in the upper part? Or are there parser known to be quite as fast with the original data? Little note: To test, I took the id being on the very last line on the file and searching for the id using grep. This took around a minute on a Core 2 Duo. What happens if the file grows even bigger, let's say 5 GB? I appreciate any notice or recommendation. Thank you all very much in advance and regards

    Read the article

  • Python: slicing a very large binary file

    - by Duncan Tait
    Say I have a binary file of 12GB and I want to slice 8GB out of the middle of it. I know the position indices I want to cut between. How do I do this? Obviously 12GB won't fit into memory, that's fine, but 8GB won't either... Which I thought was fine, but it appears binary doesn't seem to like it if you do it in chunks! I was appending 10MB at a time to a new binary file and there are discontinuities on the edges of each 10MB chunk in the new file. Is there a Pythonic way of doing this easily?

    Read the article

  • How do I parse a VCard to a Python dictionary?

    - by lecodesportif
    I'm trying to figure out how to parse a VCard to a Python dictionary using VObject. vobj=vobject.readOne(string) print vobj.behavior.knownChildren This is all I get: {'CATEGORIES': (0, None, None), 'ADR': (0, None, None), 'UID': (0, None, None), 'PHOTO': (0, None, None), 'LABEL': (0, None, None), 'VERSION': (1, 1, None), 'FN': (1, 1, None), 'ORG': (0, None, None), 'N': (1, 1, None), 'PRODID': (0, 1, None)} How can I populate the dictionary with my VCard data?

    Read the article

  • Single Instance of Child Forms in MDI Applications

    - by Akshay Deep Lamba
    In MDI application we can have multiple forms and can work with multiple forms i.e. MDI childs at a time but while developing applications we don't pay attention to the minute details of memory management. Take this as an example, when we develop application say preferably an MDI application, we have multiple child forms inside one parent form. On MDI parent form we would like to have menu strip and tab strip which in turn calls other forms which build the other parts of the application. This also makes our application looks pretty and eye-catching (not much actually). Now on a first go when a user clicks a menu item or a button on a tab strip an application initialize a new instance of a form and shows it to the user inside the MDI parent, if a user again clicks the same button the application creates another new instance for the form and presents it to the user, this will result in the un-necessary usage of the memory. Therefore, if you wish to have your application to prevent generating new instances of the forms then use the below method which will first check if the the form is visible among the list of all the child forms and then compare their types, if the form types matches with the form we are trying to initialize then the form will get activated or we can say it will be bring to front else it will be initialize and set visible to the user in the MDI parent window. The method we are using: private bool CheckForDuplicateForm(Form newForm) { bool bValue = false; foreach (Form frm in this.MdiChildren) { if (frm.GetType() == newForm.GetType()) { frm.Activate(); bValue = true; } } return bValue; } Usage: First we need to initialize the form using the NEW keyword ReportForm ReportForm = new ReportForm(); We can now check if there is another form present in the MDI parent. Here, we will use the above method to check the presence of the form and set the result in a bool variable as our function return bool value. bool frmPresent = CheckForDuplicateForm(Reportfrm); Once the above check is done then depending on the value received from the method we can set our form. if (frmPresent) return; else if (!frmPresent) { Reportfrm.MdiParent = this; Reportfrm.Show(); } In the end this is the code you will have at you menu item or tab strip click: ReportForm Reportfrm = new ReportForm(); bool frmPresent = CheckForDuplicateForm(Reportfrm); if (frmPresent) return; else if (!frmPresent) { Reportfrm.MdiParent = this; Reportfrm.Show(); }

    Read the article

  • Are you ready for SharePoint 2010?

    - by Michael Van Cleave
    With SharePoint's next release on the horizon (May 12th) many of my clients and colleagues are starting to ramp up for the upcoming tidal wave of functionality. Microsoft has been doing a terrific job of getting as much information out in the public lime light as possible over the last few months and I think that will definitely pay off with regards to acceptance of the new version of SharePoint. However, there are still some aspects of the new platform that are a little murky. Aspects such as: "Should we upgrade?" "Will my current installation upgrade without issues?" "What benefits will I see by upgrading?" "What are the best practices for upgrading or best practice in general relating to 2010?" "How should we plan to deploy SharePoint 2010 in our organization?" There is a ton of information out there, but how do you go about getting some of these questions answered? Well, I am glad you asked. (J) ShareSquared will be delivering a FREE SharePoint 2010 Readiness Webinar that will cover Preparation, Strategies, and Best Practices for the upcoming version of SharePoint. The webinar will be presented by 2 of ShareSquared's outstanding SharePoint MVP's; Gary Lapointe and Paul Stork. As all those T.V. commercials say… "Space is limited, so sign up now!" Just kidding, well kind of but not really. I am sure that the signup will be huge and space is really limited so the sooner you sign up the better. I would hate for any of you to miss out. If you have any questions please don't hesitate to shoot me a e-mail through my blog or contact ShareSquared directly. See you at the webinar! Michael

    Read the article

  • apt-get commands pausing at 'Waiting for headers'

    - by Matt
    I have a VM running Ubuntu Server 9.10 running a basic web server setup. Whenever I run an apt function it will pause for around 1 minute at 'Waiting for headers...'. It will eventually clear through and continue as normal but it is a bit of an annoyance. Everything else on the server seems to run fine. Any ideas?

    Read the article

  • How can I ask for a new dhcp lease on windows 7?

    - by Pat
    In windows7 how do I request a new dhcp lease ? What I need in the equivalent of the button "repair" on windows XP. The button "diagnose" seems to do a few things but not request a new dhcp lease if one is already available. Disabling and re-enabling the card does the trick but messes up any program capturing traffic on the interface.

    Read the article

  • How do you keep track of all your passwords?

    - by Sam Saffron
    How do you keep track of all your passwords? Personally I host a personal copy of clipperz, I used keepass and passpack in the past. What password manager would you recommend, what features does it have that make it awesome? Now at 70+ "answers" it's a pretty good bet that your favourite program is already mentioned. Upvote that if that's the case. If you can't yet upvote, come back when you've gained enough reputation instead of posting a duplicate answer.

    Read the article

  • Remote desktop into a linux machine, is this possible?

    - by fire
    I have a VPS by my host running on a linux server, and they have given me SSH access. Is it possible to remote desktop into the server, like you can on Windows, so that I can physcially click on things rather than having to use SSH commands? Surely this must be running on Fedora or Ubuntu etc. so there is some type of OS. You would probably have to install something on the servers end I suppose but just want to know if its possible and what the options are. And before you say "why not ask your host" I find superuser responses are usually much quicker :-)

    Read the article

  • Context Sensitive History. Part 1 of 2

    A Desktop and Silverlight user action management system, with undo, redo, and repeat. Allowing actions to be monitored, and grouped according to a context (such as a UI control), executed sequentially or in parallel, and even to be rolled back on failure.

    Read the article

  • How do I change the auto complete behavior in the VS 2010 editor?

    - by pinkmuppet
    How do I stop VS 2010 (RC) from autocompleting html helpers with new object { ... } when I just want to pass in an anonymous type? Backspacing is driving me crazy. e.g., VS wants: <%=Html.ActionLink("Register", "Register", new object { controller = "Account" }) %> I know the helper is declared expecting object, which is why it does this, but can I change this behavior just for mvc helpers?

    Read the article

  • Configuring ASMX Web Service End Points - web.config

    - by tyndall
    I have set up references to 2 web services in a separate assembly TestProj.Core. I reference this Project in a Web Application Project called TestProj.Web. When I setup the references in TestProj.Core the wizard gave me an app.config and through an application settings section into it. How do I get these settings to my web app? Copy and paste these into web.config? "Always Copy" the app.config out to the bin directory? Any good articles on mutiple configs?

    Read the article

  • What is the fastest way to create a checksum for large files in C#

    - by crono
    Hi, I have to sync large files across some machines. The files can be up to 6GB in size. The sync will be done manually every few weeks. I cant take the filename into consideration because they can change anytime. My plan is to create checksums on the destination PC and on the source PC and than copy all files with a checksum, which are not already in the destination, to the destination. My first attempt was something like this: using System.IO; using System.Security.Cryptography; private static string GetChecksum(string file) { using (FileStream stream = File.OpenRead(file)) { SHA256Managed sha = new SHA256Managed(); byte[] checksum = sha.ComputeHash(stream); return BitConverter.ToString(checksum).Replace("-", String.Empty); } } The Problem was the runtime: - with SHA256 with a 1,6 GB File - 20 minutes - with MD5 with a 1,6 GB File - 6.15 minutes Is there a better - faster - way to get the checksum (maybe with a better hash function)?

    Read the article

  • OpenGL|ES on a desktop PC.

    - by almb
    I'm working on a OpenGL project that I would like to port to embedded systems that support OpenGL|ES. Since OpenGL|ES is a subset of OpenGL how hard would it be to compile my OpenGL application on an embedded system? (Assuming that my OpenGL code is in the limits of OpenGL|ES) I guess what I'm wondering is: is it possible to dircetly wrap my OpenGL calls with MACROS to make it compatible with OpenGL|ES API call names? Are there any calls specific to OpenGL|ES that I would have to implement? Sorry, if I'm not clear. Thank you.

    Read the article

  • Is it good practice to generally make heavyweight classes non-copyable?

    - by Emile Cormier
    I have a Shape class containing potentially many vertices, and I was contemplating making copy-constructor/copy-assignment private to prevent accidental needless copying of my heavyweight class (for example, passing by value instead of by reference). To make a copy of Shape, one would have to deliberately call a "clone" or "duplicate" method. Is this good practice? I wonder why STL containers don't use this approach, as I rarely want to pass them by value.

    Read the article

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

< Previous Page | 74 75 76 77 78 79 80 81 82 83 84 85  | Next Page >