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• fastest (low latency) method for Inter Process Communication between Java and C/C++

  - by Bastien

  Hello, I have a Java app, connecting through TCP socket to a "server" developed in C/C++. both app & server are running on the same machine, a Solaris box (but we're considering migrating to Linux eventually). type of data exchanged is simple messages (login, login ACK, then client asks for something, server replies). each message is around 300 bytes long. Currently we're using Sockets, and all is OK, however I'm looking for a faster way to exchange data (lower latency), using IPC methods. I've been researching the net and came up with references to the following technologies: - shared memory - pipes - queues but I couldn't find proper analysis of their respective performances, neither how to implement them in both JAVA and C/C++ (so that they can talk to each other), except maybe pipes that I could imagine how to do. can anyone comment about performances & feasibility of each method in this context ? any pointer / link to useful implementation information ? thanks for your help

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• how to word wrap a QTreeWidgetItem

  - by japs

  hello all, i have to populate a QTreeWidget with items (or children of items) that may happen to be too long to fit in a single line, so i'm looking for a way to word wrap them. i thought myQTreeWidget.setWordWrap(True) (done via QtDesigner4) would have done the job, but that doesn't seem to be the case. i don't konw if it is relevant, but the tree is enveloped in a splitter frame, so the wrapping should be somehow dynamic to allow resizing of the splitter. Any ideas? I use PyQt4, but hints in any language/binding would be much appreciated. have a good day all.

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• Overlay 2d weapon sprite over character sprite ?

  - by Mr.Gando

  Hello, I'm working on a game where my character needs to be able to have different weapons. For that I think that somehow overlaying the weapon over the moving sprite would be the correct choice, but I'm not sure about how could I do this. Assuming my Character spritesheet looks like this: And my preliminar weapon spritesheet ( haven't decided on a fixed square size for the weapon yet ), looks like this: How would you make the overlay to set the weapon correctly over the character hand for each of his frames? I know that one way would be just to have a weapon frame the same size as my character sprites, and overlay those too, but I think that if the game has way too much weapons (say 15 different kinds of one hand weaps) this could get pretty insane ( having one weapon sprite sheet the same size as the character sprite sheet for each type of weapon ) Do you guys have any advice on how to implement this? (supporting overlaying the weapon sprites over the character sprites) Thanks!

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• Mobile Safari iPhone Development - Multiple buttons in a row

  - by Thomas

  Hello all: I'm an iPhone developer, but new to web development. I've done some basic HTML websites and made one in iWeb as well. I'm trying to branch out to actual mobile development now, so I checked out Dashcode. Anyway, I'm trying to put a Call Button, Mail Button, and Map Button in horizontal alignment. I realize that I can add a Column Layout and have two buttons in a row, but that's the most I've gotten. Any ideas? Thanks! Thomas

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• Implementing ma? osx loop device driver.

  - by Inso Reiges

  Hello, I am aware that there is a native implementation of loop device system on osx, the hdiutil/hdix driver. But due to a number of reasons i need to roll out my own custom loop driver. Since hdix is closed-source can anyone give some starting pointers, links, advises, etc. on the subject? I had expirience implementing loop drivers on linux and windows but i don't really have a clue where to start from on osx. The basic functionality i need to implement is the same: given any file on disk, simulate a virtual block device interface for it. I also would like my loop driver to use all the native partition filter stacking available for real and hdix virtual block devices on osx.

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• [change] Vlookup onto another workbook

  - by Arcadian

  Hello, here is my dilemma. I have two worksheets one that has the name of clients and one that i want to copy the names to depending on the city. For instance: associated to each column is last name, first name and city. i have hundreds of names associated to different cities and what i would like is from worksheet1.xls to copy all the New York clients to worksheet2.xls either when i open worksheet2 or via macro what ever is easier and because last name is in one cell and the first name is in the other i would have to copy both. I saw that its possible to link cells from one worksheet to another and then do a vlookup depending on the criteria. Is that the best easiest way or is there another? thanks in advance and cheers oleg

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• Problem with MIB_IFTABLE & MIB_IFROW

  - by calvin

  Hello there, Im using MIB_IFTABLE & MIB_IFROW to get the no.of bytes transmitted & received. Everything looks fine, and values are correct in case of using WIFI alone. But when i use vpn connection over wifi these values are not correct for wifi adapter, interestingly i'm getting correct values for vpn adapter. And if i see status of any of these adapters(right click and see status), all these values given by windows are correct. here are my questions. 1) is there any other way of getting no.of bytes transferred over adapter? 2) is there a way to tell whether adapter is vpn or not? (as all vpn adapters are shows as Local Area Connection) 3) If you are connected to VPN, is there a possibility of bytes getting transferred through other than this vpn adapter?(forget about split tunneling, consider very simple case) i use vs2005, win7, Im new to these protocols, thanks for any help. -calvin

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• Instance management with Dependency injection (DI)

  - by Sven

  Hello I'm trying to understand how DI exactly works. I'm currently using Windsor as DI container. I use this to load my services dynamically in code without direct reference. But I have change behaviour and want to know a bit more on the instance mgmt using DI. I have a web app projct, here is a WCF service using PerCall as instancemode. This means, new instance/call. In this WCF I call a service (loaded via DI) and this service calls another service (again loaded via DI). The WCF is a new instance in the appdomain, but what about the services. They are also new instances? Is this DI container shared among all WCF instances and are the services in this container also single instances? Can anyone clarify?

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• how iterate over class members java (app-engine)

  - by Alexandre H. Tremblay

  Hello, I am using the java version of the google app engine. I would like to create a function that can receive as parameters many types of objects. I would like to print out the members of the object. Each objects may be different and the function must work for all objects. Do I have to use reflection - if so, what kind of code do I need to write? public class dataOrganization { private String name; private String contact; private PostalAddress address; public dataOrganization(){} } public int getObject(Object obj){ // This function prints out the name of every // member of the object, the type and the value // In this example, it would print out "name - String - null", // "contact - String - null" and "address - PostalAddress - null" } How would I write the function getObject?

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• how to retrieve part of a string in java?

  - by mithun1538

  Hello everyone, I am designing a chat applet. In this, a user will append his name to the beginning of the message that he sends to the other user. In the window of other user, I want to retrieve the appended user name from that string. How do I do that? The message sent by the user is as follows : final_msg = user_name + ": " + user_message Hence I want to know how to retrieve the user_name string only. Is there a function that can retrieve a substring upto the first ":"? I dont want to use final_msg.split(":"), because there is a possiblity that the user_message contains ":", which will then give me an array of strings.

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• by jquery, set to option of html-select element selected atribude by text, not value

  - by loviji

  hello. I have a select element. <select class='cSelectType'> <option value="1">one</option> <option value="2">two</option> <option value="3">three</option> <option value="4">four</option> <option value="5">five</option> </select> i can by jquery set option value selected like this: $('.cSelectType option[value=4]').attr('selected', 'selected'); And select element will show "Four". By i wont something like this: $('.cSelectType option[xxx=Four]').attr('selected', 'selected'); i.e By text set selected attribute. some ideas please.

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• by jquery, set to option of html-select element selected atribude by text, not value. .

  - by loviji

  hello. I have a select element. <select class='cSelectType'> <option value="1">one</option> <option value="2">two</option> <option value="3">three</option> <option value="4">four</option> <option value="5">five</option> </select> i can by jquery set option value selected like this: $('.cSelectType option[value=4]').attr('selected', 'selected'); And select element will show "Four". By i wont something like this: $('.cSelectType option[xxx=Four]').attr('selected', 'selected'); i.e By text set selected attribute. some ideas please.

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• Problems in user - registration module in DRUPAL

  - by Nitz

  Hello Guys, I have some problem in drupal registration page. I want to change whole user registration page. in registration module i want to add new field type. Bcz i want that user can choose the date from date-time picker. I have ready date-time picker which i have implement, but i don't know where to put that code. I want to add validation on new added text fields. Means i have added one text field for Phone no, so now i want to check if user had only entered the numbers.....in new user registration page. Thanks in advance Nitish

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• how to run fastcgi

  - by joels

  I have fastcgi installed and running. I downloaded a developerkit from fastcgi.com. It had some examples in it. One of the example files echos some stuff. It required a .libs and a .deps I put those folders along with a echo.fcgi file and into the webroot/cgi-bin. If I got to the echo.fcgi url, it works great. I created a simple c file that prints hello world. I compile it using gcc -Wall -o main -lfcgi main.c What do I do with it now? Does it require something like a perl script or php script to be executed. Or, should I just be able to put it in the webroot/cgi-bin folder and go to it's url?

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• Trouble setting up php Zend include path

  - by behrk2

  Hello, I am trying to set up a PHP path to my Zend Framework. I am very confused on how to do this. My Zend Framework is located at the following location on my server: amazon/ZendFramework-1.10.3-minimal I am going to be creating a couple of php files in the amazon/ directory that will require the Zend Framework. My include path is: include("ZendFramework-1.10.3-minimal/library/Zend/Service/Amazon.php"); This works, however inside of Amazon.php is the line require_once 'Zend/Rest/Client.php'; ...and then Client.php has more dependencies set up like that, and so on. How can I set up my include path so that Amazon.php and Client.php (and so on) can correctly reference the location of the Zend Framework? Thanks

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• Background selector declaration in CSS

  - by Shivanand

  Hello, In CSS declaration for a selector is given as: background-attachment: scroll; background-color: transparent; background-image: url(/images/ucc/green/btn-part2.gif); background-repeat: no-repeat; background-position: right top; I want to optimize the code and change it to: background: scroll transparent url(/images/ucc/green/btn-part2.gif) no-repeat right top; My question is, Is this correct way and does it work in IE7/8, Firefox, Safari?

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• linq to sql datacontext for a web application

  - by rap-uvic

  Hello, I'm trying to use linq to sql for my project (very short deadline), and I'm kind of in a bind. I don't know the best way to have a data context handy per request thread. I want something like a singleton class from which all my repository classes can access the current data context. However, singleton class is static and is not thread-safe and therefore not suitable for web apps. I want something that would create a data context at the beginning of the request and dispose of it along with the request. Can anyone please share their solution to this problem? I've been searching for a solution and I've found a good post from Rick Strahl : http://www.west-wind.com/weblog/posts/246222.aspx but I don't completely understand his thread-safe or business object approach. If somebody has a simplified version of his thread-safe approach, i'd love to take a look.

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• not readable PDF files

  - by Michal_R

  Hello, I am writing Master's thesis - NLP system. I have one component - extractor. It is extracting a plain text from PDF files. There are a few PDF files that can not be extracted correctly. Extractor (PDFBox library) returns a string like this: "¦xDn¦if|d+gDF"Ti&cD+lh d FÁhis~n +xd f«"d¦ffih »h" or "10a61a91a22a25a3a27a17a23a20a8a13a14a61a25a17" I was checking each file that makes this extraction's problem and all these files' text also can not be copy-pasted from PDF Reader (Adobe Reader and FoxIt reader). Viewing them in this readers is enabled, but after selecting its content and copying to the clipboard I get the same wrong text (as described above - strings of not semanticaly correct chars or strings of digits and letters) Could anybody help me??? THX :)

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• Client Side Development - In Process/Completed Indicator Preferences?

  - by Brian

  Hello, I have been doing more client-side development, managing the UI on the client and submitting data to the server via web service calls. I'm not looking for implementation details, but was curious on developer preferences for displaying an operation in process and what to display when completed or even failed. As a for instance, just for clarification sake, what if you are submitting a profile form's data to a web service. I want to display that something's happening to the user, and give them a message that the form submitted successfully. I've in the past used a twitter-style message (that appears at the top), modal dialogs... I was curious what worked for others and any advice (what did the users like/not like, etc.). Again, technical details aren't needed. Thanks.

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• Posting from JQuery to WCF Service

  - by Villager

  Hello, I have a WCF Service (called "myservice.svc") that takes a message from a user and saves it to the database. It returns a response to the user in the form of a number. This operation looks like this: [OperationContract] [WebGet] public string SubmitMessage(string message) { try { // SAVE TO DATABASE return "1"; } catch (Exception ex) { return "0"; } } I want to call this operation from some JQuery. I'm using the approach shown here: $.getJSON( "/services/myService.svc", {message:"some text"}, function (data) { alert("success"); } ); Oddly, the "success" alert is never displayed. In addition, I have set a breakpoint in my WCF service and it is never being tripped. What am I doing wrong? Thank you

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• How to use Mesa3D on Mac OS X and Windows

  - by gutsblow

  Hello all, I need to use Mesa3D for a cross platform application(windows and Mac only) which uses only offline software rendering. The reason I wanted to use Mesa3D is because it has the same Drawing calls as OpenGL and they are really easy. Now I know that Apple itself has a software implementation (which I heard is flaky), but I prefer using Mesa so that it's a lot easier for me to maintain the code on both platforms. On windows I managed to compile three DLL's from the Mesa3d source, but don't know what to do with them. On Mac OS X I am completely clueless. I would highly appreciate your help. Thank you once again very much!

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• Oracle Data Pump import to a sql file error :ORA-31655 no data or metadata objects

  - by Francisco Quiñones

  Hello, I'm using Data Pump to export/import data, one requirement is to import data to a sql file. The OS is window. I made the follow export : expdp system/password directory=dpump_dir dumpfile=tablesdump.dmp content=DATA_ONLY tables=user.tablename and it works, I can see the file TABLESDUMP.DMP in the directory path. then when I tried to import it to a sql file: impdp system/password directory=dpump_dir dumpfile=tablesdump.dmp sqlfile=tables_export.sql the log show : ..... ORA-31655 no data or metadata objects selected for job ..... and the sql file is created empty in the directory path. I'm not DBA, I'm a Java developer , Can you help me? Thks

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• Qooxdoo REST JSON request problem - unexpected token and then timeout

  - by freiksenet

  Hello! I am learning Qooxdoo framework and I am trying to make it work with a small Django web service. Django webservice just returns JSON data like this: { "name": "Football", "description": "The most popular sport." } Then I use the following code to query that url: var req = new qx.io.remote.Request(url, "GET", "application/json"); req.toggleCrossDomain(); req.addListener("completed", function(e) { alert(e.getContent()); }); req.send(); Unfortunately when I execute the code I get unexpected token error and then request timeouts. Uncaught SyntaxError: Unexpected token : Native.js:91013011 qx.io.remote.RequestQueue[246]: Timeout: transport 248 Native.js:91013011 qx.io.remote.RequestQueue[246]: 5036ms > 5000ms Native.js:91013013 qx.io.remote.Exchange[248]: Timeout: implementation 249 JSLint reports that this is a valid JSON, so I wonder why Qooxdoo doesn't parse it correctly.

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• How to dynamically add controls in asp.net Dynamic Data

  - by loviji

  Hello, i'm trying to work with asp.NET Dynamic Data. So, I see asp.NET Dynamic Data not well learned by people as other technologies. now, to my question. Lets us work with Details.aspx page that located on ~\DynamicData\PageTemplates I need to add <asp:DynamicControl runat="server" to page into Form1.detailsTable. i've tried like this: protected DynamicControl myC=new DynamicControl(); protected void Page_Load(object sender, EventArgs e) { foreach(var c in table.Columns) { myC.DataField=c.DisplayName; FormView1.Controls.Add(myC); } } but I can not see the desired result. where is the problem. thanks

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• How best to pre-install OR pre-load OR cache Java Script library to optimize performance.

  - by Kabeer

  Hello. I am working for an intranet application. Therefore I have some control on the client machines. The Java Script library I am using is somewhat big in size. I would like to pre-install OR pre-load OR cache the Java Script library on each machine (each browser as well) so that it does not travel for each request. I know that browsers do cache a Java Script library for subsequent requests but I would like the library to be cached once so all subsequent requests, sessions and users. What is the best mechanism to achieve this?

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