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  • Does the deprecation of mysql_* functions in PHP carry over to other Databases(MSSQL)?

    - by MobyD
    I'm not talking about MySQL, I'm talking about Microsoft SQL Server I've been aware of PDO for quite some time now, standard mysql functions are dangerous and should be avoided. http://php.net/manual/en/function.mysql-connect.php But what about the MSSQL function in PHP? They are, for most purposes, identical sets of functions, but the PHP page describing mssql_* carries no warning of deprecation. http://us.php.net/manual/en/function.mssql-connect.php There are PDO drivers available for MSSQL, but they aren't quite as readily available or used as the MySQL drivers. Ideally, it looks to me like I should get them working and move from mssql_* to PDO like I have with MySQL, but is it as big of a priority? Is there some hidden safety to MSSQL that means it's exempt from all of the mysql_* hatred as of late? Or is its obscurity as a backend the only reason there hasn't been more PDO encouragement?

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  • How should I handle using two databases with a legacy PHP application?

    - by Toby Allen
    I have a legacy PHP application that was written in 2004 and uses MSSQL as a database backend. At this stage MSSQL is still supported by PHP but only just via a Microsoft driver. I have looked at converting to mysql via automated tools, which work quite well, but I have quite complex views which need a lot of individual work to convert. I don't have a great deal of time to do this. Many tools I wish to use and frameworks I would like to move the application to, don't support MSSQL, so I was considering adding new features using a new mysql database and wondered if anyone had opinions on the pros and cons of using two seperate database backends in a single application?

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  • Qt Graphics et performance - velours et QML Scene Graph, un article de Gunnar, traduit par Thibaut Cuvelier

    Le 11 décembre 2009, la documentation de QPainter subissait un énorme ajout concernant l'optimisation de son utilisation. En effet, le bon usage de cet outil n'était pas accessible à tous, il n'était pas présenté dans la documentation. Ceci ne fut qu'un prétexte à une série d'articles sur l'optimisation de QPainter et de Qt Graphics en général. Voici donc le premier article de cette série, les autres sont en préparation : Qt Graphics et performances : ce qui est critique et ce qui ne l'est pas Pensez-vous que cet ajout à la documentation de QPainter sera utile ? Trouvez-vous les performances de vos applications trop faibles ?...

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  • Should I keep separate client codebases and databases for a software-as-a-service application?

    - by John
    My question is about the architecture of my application. I have a Rails application where companies can administrate all things related to their clients. Companies would buy a subscription and their users can access the application online. Hopefully I will get multiple companies subscribing to my application/service. What should I do with my code and database? Seperate app code base and database per company One app code base but seperate database per company One app code base and one database The decision involves security (e.g. a user from company X should not see any data from company Y) performance (let's suppose it becomes successful, it should have a good performance) and scalability (again, if successful, it should have a good performance but also easy for me to handle all the companies, code changes, etc). For the sake of maintainability, I tend to opt for the one code base, but for the database I really don't know. What do you think is the best option?

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  • What is the best way to work with large databases in Java depending on context?

    - by user19000
    We are trying to figure out the best practice for working with very large DBs in Java. What we do is a kind of BI (business Intelligence), i.e analyzing very large DBs, and using them to create intermediate DBs that represent intelligent knowledge of the DBs. We are currently using JDBC, and just preforming queries using a ResultSet. As more and more data is being created, we are wondering whether more appropriate ways exist for parsing and manipulating these large DBs: We need to support 'chunk' manipulation and not an entire DB at once(e.g. limit in JDBC, very poor performance) We do not need to be constantly connected since we are just pulling results and creating new tables of our own. We want to understand JDBC alternatives, with respect to advantages and disadvantages. Whether you think JDBC is the way to go or not, what are the best practices to go by depending on context (e.g. for large DBs queried in chunks)?

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  • Can I create two databases, each for different directories?

    - by Tim
    I have run Recoll which created a database for my data partition on my internal hard drive. The database is stored under my home partition in the same internal hard drive. I now want to run Recoll to create a database for a dicrectory on my external hard drive, and store this new database on that external hard drive, because my internal hard drive doesn't have enough space to hold the new database. I was wondering how to do that in Recoll? Note: my current Recoll was installed from software center of Ubuntu 12.04. Thanks!

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  • Database Snapshots of Mirrored databases affect performance of Principal database?

    - by yrushka
    I have 2 servers set in Mirroring High-safety. One is Principal and another in Mirror. Currently I have 2 snapshots of a Production database (100 GB size) created on Principal server (for no_lock purpose of massive select processes) and 2 snapshots on the mirror server for the same database for reporting purposes. I know snapshots reduce performance of source databases but I am not sure if snapshots from mirror server have any impact on principal server's performance. thanks,

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  • How to customize the renders in prefuse. Problem in customize images in prefuse layout

    - by user324926
    HI all, I have written a java application to show the images in different layouts. I am able to show it different layout correctly but some times the images are overlapped. Can you please help me, how to solve this problem. My code is given below `import javax.swing.JFrame; import java.awt.image.BufferedImage; import javax.imageio.ImageIO; import java.util.; import java.io.; import java.awt.Font; import prefuse.Constants; import prefuse.Display; import prefuse.Visualization; import prefuse.action.ActionList; import prefuse.action.RepaintAction; import prefuse.action.assignment.ColorAction; import prefuse.action.assignment.FontAction; import prefuse.action.assignment.DataColorAction; import prefuse.action.layout.graph.ForceDirectedLayout; import prefuse.action.layout.graph.; import prefuse.action.layout.; import prefuse.activity.Activity; import prefuse.controls.DragControl; import prefuse.controls.PanControl; import prefuse.controls.ZoomControl; import prefuse.data.Graph; import prefuse.data.io.DataIOException; import prefuse.data.io.GraphMLReader; import prefuse.render.DefaultRendererFactory; import prefuse.render.LabelRenderer; import prefuse.util.ColorLib; import prefuse.visual.VisualItem; import prefuse.visual.*; import prefuse.util.FontLib; import prefuse.action.assignment.DataSizeAction; import prefuse.data.*; import prefuse.render.ImageFactory; public class LayoutExample { public static void main(String[] argv) throws Exception { Graph graph = null; try { graph = new GraphMLReader().readGraph("/graphs.xml"); } catch ( DataIOException e ) { e.printStackTrace(); System.err.println("Error loading graph. Exiting..."); System.exit(1); } ImageFactory imageFactory = new ImageFactory(100,100); try { //load images and construct imageFactory. String images[] = new String[3]; images[0] = "data/images/switch.png"; images[1] = "data/images/ip_network.png"; images[2] = "data/images/router.png"; String[] names = new String[] {"Switch","Network","Router"}; BufferedImage img = null; for(int i=0; i < images.length ; i++) { try { img = ImageIO.read(new File(images[i])); imageFactory.addImage(names[i],img); } catch (IOException e){ } } } catch(Exception exp) { } Visualization vis = new Visualization(); vis.add("graph", graph); LabelRenderer nodeRenderer = new LabelRenderer("name", "type"); nodeRenderer.setVerticalAlignment(Constants.BOTTOM); nodeRenderer.setHorizontalPadding(0); nodeRenderer.setVerticalPadding(0); nodeRenderer.setImagePosition(Constants.TOP); nodeRenderer.setMaxImageDimensions(100,100); DefaultRendererFactory drf = new DefaultRendererFactory(); drf.setDefaultRenderer(nodeRenderer); vis.setRendererFactory(drf); ColorAction nText = new ColorAction("graph.nodes", VisualItem.TEXTCOLOR); nText.setDefaultColor(ColorLib.gray(100)); ColorAction nEdges = new ColorAction("graph.edges", VisualItem.STROKECOLOR); nEdges.setDefaultColor(ColorLib.gray(100)); // bundle the color actions ActionList draw = new ActionList(); //MAD - changing the size of the nodes dependent on the weight of the people final DataSizeAction dsa = new DataSizeAction("graph.nodes","size"); draw.add(dsa); draw.add(nText); draw.add(new FontAction("graph.nodes", FontLib.getFont("Tahoma",Font.BOLD, 12))); draw.add(nEdges); vis.putAction("draw", draw); ActionList layout = new ActionList(Activity.DEFAULT_STEP_TIME); BalloonTreeLayout balloonlayout = new BalloonTreeLayout("graph",50); layout.add(balloonlayout); Display d = new Display(vis); vis.putAction("layout", layout); // start up the animated layout vis.run("draw"); vis.run("layout"); d.addControlListener(new DragControl()); // pan with left-click drag on background d.addControlListener(new PanControl()); // zoom with right-click drag d.addControlListener(new ZoomControl()); // -- 6. launch the visualization ------------------------------------- // create a new window to hold the visualization JFrame frame = new JFrame("prefuse example"); // ensure application exits when window is closed frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(d); frame.pack(); // layout components in window frame.setVisible(true); // show the window } } ` Can anyone please let me know how to customize the image sizes / renders insuch way that images won't overlapped. Thanks R.Ravikumar

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  • graphviz segmentation fault

    - by LucaB
    Hi I'm building a graph with many nodes, around 3000. I wrote a simple python program to do the trick with graphviz, but it gives me segmentation fault and I don't know why, if the graph is too big or if i'm missing something. The code is: #!/usr/bin/env python # Import graphviz import sys sys.path.append('..') sys.path.append('/usr/lib/graphviz') import gv # Import pygraph from pygraph.classes.graph import graph from pygraph.classes.digraph import digraph from pygraph.algorithms.searching import breadth_first_search from pygraph.readwrite.dot import write # Graph creation gr = graph() file = open('nodes.dat', 'r') line = file.readline() while line: gr.add_nodes([line[0:-1]]) line = file.readline() file.close() print 'nodes finished, beginning edges' edges = open('edges_ok.dat', 'r') edge = edges.readline() while edge: gr.add_edge((edge.split()[0], edge.split()[1])) edge = edges.readline() edges.close() print 'edges finished' print 'Drawing' # Draw as PNG dot = write(gr) gvv = gv.readstring(dot) gv.layout(gvv,'dot') gv.render(gvv,'svg','graph.svg') and it crashes at the gv.layout() call. The files are somthing like: nodes: node1 node2 node3 edges_ok: node1 node2 node2 node3

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  • Complex Entity Framework linked-graphs issue: how to limit change set / break the graph?

    - by Hightechrider
    I have an EDMX containing Sentences, and Words, say and a Sentence contains three Words, say. Appropriate FK relationships exist between the tables. I create some words: Word word1 = new Word(); Word word2 = ... I build a Sentence: Sentence x = new Sentence (word1, word2, word3); I build another Sentence: Sentence y = new Sentence (word1, word4, word5); I try to save x to the database, but EF builds a change set that includes everything, including y, word4 and word5 that aren't ready to save to the database. When SaveChanges() happens it throws an exception: Unable to determine the principal end of the ... relationship. Multiple added entities may have the same primary key. I think it does this because Word has an EntityCollection<Sentence> on it from the FK relationship between the two tables, and thus Sentence y is inextricably linked to Sentence x through word1. So I remove the Navigation Property Sentences from Word and try again. It still tries to put the entire graph into the change set. What suggestions do the Entity Framework experts have for ways to break this connection. Essentially what I want is a one-way mapping from Sentence to Word; I don't want an EntityCollection<Sentence> on Word and I don't want the object graph to get intertwined like this. Code sample: This puts two sentences into the database because Verb1 links them and EF explores the entire graph of existing objects and added objects when you do Add/SaveChanges. Word subject1 = new Word(){ Text = "Subject1"}; Word subject2 = new Word(){ Text = "Subject2"}; Word verb1 = new Word(){ Text = "Verb11"}; Word object1 = new Word(){ Text = "Object1"}; Word object2 = new Word(){ Text = "Object2"}; Sentence s1 = new Sentence(){Subject = subject1, Verb=verb1, Object=object1}; Sentence s2 = new Sentence(){Subject=subject2, Verb=verb1, Object=object2}; context.AddToSentences(s1); context.SaveChanges(); foreach (var s in context.Sentences) { Console.WriteLine(s.Subject + " " + s.Verb + " " + s.Object); }

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  • Do you know of a free .Net component for visual flow model graph design and editing?

    - by Ivan
    An app (C#4, WinForms, Entity Framework, SQL Server 2008) of mine maintains a graph of interconnected objects, each having some simple member fields and a set of many directed (in and out) one-to-one links to other objects. I'd like to offer a user an ability to view and edit this graph visually some way, creating and removing connections, modifying objects attributes values and introducing/dropping objects. I suppose there has to be a framework (at list a primitive kind of) for this as visual model design tools are pretty common to meet. Do you know one?

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  • Facebook Graph API: Feed publishing showing up as link type instead of status?

    - by Redth
    So I'm publishing to a Facebook Group's Feed in my app, using the Graph API. It works fine, except facebook keeps treating the published info as a 'link' feed item type instead of 'status' like it does when I enter the same from facebook's site. eg: string url = "https://graph.facebook.com/<id-of-group/feed?access_token=<access-token>"; string data = "message=hello"; webClient.UploadString(url, "POST", data); Now when I pull the feed items, the json that is returned has "item":"link", with "link":"http://www.facebook.com", whereas I'd expect it to be "item":"status" and no or an empty "link" property. Any ideas?

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  • How to upload a picture for an event using the Facebook Graph API?

    - by Thorarin
    I would like to know how to add a picture to an event using the Facebook Graph API. I have seen this question and tried some variations on that theme, without any success. The official documentation doesn't seem to make any mention of it. I'm using PHP for this particular project and I've looked at the PHP SDK source code, which is not helpful in any way. Requesting metadata for pictures using https://graph.facebook.com/eventid/picture?metadata=1&access_token... doesn't seem to be recognized, so no help there either. Has anyone come across some example or documentation on how to do this? (don't care about which language it is in)

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  • How i access the array of CGPoints to draw the graph?

    - by Rajendra Bhole
    Hi, I have the code in which i want to develop the graph.The code is, NSArray *coordinate = [[NSArray alloc] initWithObjects: @"42,213", @"75,173", @"108,153", @"141,133", @"174,113", @"207,73", @"240,33", nil]; CGContextSetRGBFillColor(ctx, 255, 0, 0, 1.0); CGContextSetLineWidth(ctx, 8.0); for(int intIndex = 0; intIndex < [coordinate count]; fltX1+=33, intIndex++) { CGContextMoveToPoint(ctx, fltX1+37, fltY2+18); CGPoint point = [[coordinate objectAtIndex:intIndex] CGPointValue]; CGContextAddLineToPoint(ctx, point); CGContextStrokePath(ctx); } The problem is that the function of CGContextAddLineToPoint(ctx, point); not working properly. How i drawing the line in the graph using above code????????

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  • Flex Custom UIComponents

    - by user164142
    I have created a graph component in AS3 which extends UIComponent. I created an mxml component which is just a Label. The idea is to use the label component to show the values on the graph when you hover over points. I have tried two approaches. Create the Label component using ClassFactory inside the graph so it gets created in the graph component and addChild is called there. The problem is it is always 0 in size. Create in main mxml file and pass in to graph using a setter, the sizing is perfect but the x an y dont relate to my graph :( I suppose its similar to flex and itemrenderers, but in my case i have a graph and another component which can be changed, at the moment it is just a Label. Thanks Neil

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  • Makefile can not find boost libraries installed by macports

    - by user327502
    I just installed boost 1.42.0 from macports using sudo port install boost. Everything worked fine. Now I have a project that I'm trying to build using a makefile. Everything builds fine until it comes to the file that needs the boost library. It says: src/graph.h:20:42: error: boost/graph/adjacency_list.hpp: No such file or directory That file is actually located in two places: /opt/local/include/boost/graph/adjacency_list.hpp and /opt/local/var/macports/software/boost/1.42.0_0/opt/local/include/boost/graph/adjacency_list.hpp In the file src/graph.h where it's looking for boost/graph/adjacency_list.hpp, the include statement is here: #include<boost/graph/adjacency_list.hpp> How do I make this work?

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  • How do I post a link to the feed of a page via the Graph API *as* the page?

    - by jsdalton
    I'm working on a plugin for a Wordpress blog that posts a link to every article published to a Facebook Page associated with the blog. I'm using the Graph API and I have authenticated myself, for the time being, via OAuth. I can successfully post a message to the page using curl via a POST request to https://graph.facebook.com/{mypageid}/feed` with e.g. message = "This is a test" and it published the message. The problem is that the message is "from" my user account. I'm an admin on this test page, and when I go to Facebook and post an update from the web, the link comes "from" my page. Is there a way to authenticate myself as a page? Or is there an alternate way to POST to a page feed that doesn't end up being interpreted as a comment from a user? Thanks for any thoughts or suggestions.

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  • Faq and Best tips Regarding Learning Database ?

    - by AdityaGameProgrammer
    For a programmer with no prior exposure to databases What would be a good database to learn Oracle vs SQLserver vs MySQLvs PostgreSQL? I have come across lot of discussion MySQL and PostgreSQL and frankly I am confused on which to start with. Are these very different, in the sense if one had to switch, would the exposure to one be counter-productive to learning the other? Is working with databases heavily platform dependent? What exactly do people mean by Data base programming vs. administration? Do people chose databases based on the programming language used for the application developed? In general, Working with databases is it implicit that we work with some server? Does the choice of databases differ when it comes to game development? If so what factors does it differ by? What are the Best Tips that you have found to be useful when learning databases Edit: Some FAQ i had and found the same on SO What should every developer know about databases? Which database if learning from scratch in 2010? For a beginner, is there much difference between MySQL and PostgreSQL What RDBMS should I learn/use? (MySql/SQL Server/Oracle etc.) To what extent should a developer learn database? How are database programmers different from other programmers? what kind of database are used in games?

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