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• Best practice for installing python modules from an arbitrary VCS repository

  - by fmark

  I'm newish to the python ecosystem, and have a question about module editing. I use a bunch of third-party modules, distributed on PyPi. Coming from a C and Java background, I love the ease of easy_install <whatever>. This is a new, wonderful world, but the model breaks down when I want to edit the newly installed module for two reasons: The egg files may be stored in a folder or archive somewhere crazy on the file system. Using an egg seems to preclude using the version control system of the originating project, just as using a debian package precludes development from an originating VCS repository. What is the best practice for installing modules from an arbitrary VCS repository? I want to be able to continue to import foomodule in other scripts.

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• What is the best area for freelance / small business developer work - and how to find it

  - by Olav

  Most freelance developers are essentially contractors - working full time and often hired through another company. What are the best options for real freelancing or small business built around development skills? (I am only looking for local clients, odesk etc is not interesting) Most options open for small companies are web sites. But most clients don't want to pay much, and there are lots of people that are willing to do it for very little money. Think if you want to do money that way you must be a "web site" business. Think the best option should be to work for companies spending a lot of resources on web and db? How could I get in touch with them? Other ideas? Part of my concept is to use some off-shoring to complement my skillset, so i should be able to do PHP or Drupal even if I am not at expert level.

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• java equivalent of ruby's ||= syntax

  - by brad

  I'm brand new to java, coming from a ruby world. One thing I love about ruby is the very terse syntax such as ||=. I realize of course that a compiled language is different, but I'm wondering if Java has anything similar. In particular, what I do all the time in ruby is something like: someVar ||= SomeClass.new I think this is incredibly terse, yet powerful, but thus far the only method I can think of to achieve the same thing is a very verbose: if(someVar == null){ someVar = new SomeClass() } Just trying to improve my Java-fu and syntax is certainly one area that I'm no pro.

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• PyQt: How to Know Progress of a Process Running background

  - by krishnanunni

  Hello there. Im in real confusion with the ProgressBar mechanisms. However now i need help on this "Can we know the percentage completion or time remaining of completion of a Process, that has been initiated from a Qt interface like this ` self.process = QProcess() self.connect(self.process, SIGNAL("readyReadStdout()"), self.readOutput) self.connect(self.process, SIGNAL("readyReadStderr()"), self.readErrors) tarsourcepath="sudo tar xvpf "+ self.path1 self.process.setArguments(QStringList.split(" ",tarsourcepath)) self.textLabel3.setText(self.__tr("Extracting.....")) self.process.start()` slots readOUtput just implements the collection of data fron stdout and transferring it to a text browser. I need to know is there any way we could monitor the ongoing process, making to knowpercentage completion, so that i can manage a progressbar for this. Thanks Experts

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• Getting my ip address

  - by AntonioCS

  Hey! I have a computer on a small network, so my ip is 192.168.2.100. I am trying to get my real ip. I download the no-ip client but that just seems like a lot of trouble for such a simple thing. I created this php script that got http://www.ip-adress.com/ page and retrieved the ip it gave me. Is there a simpler way? Either using C, WSH or something. Or if there is an easier way in php please tell me. When I get the ip I'll uploaded it to my ftp site so that I can see the ip from work.

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• mysql: encrypting and decrypting data

  - by cbrulak

  Does mysql provide a mechanism for storing and retrieving encrypted data? I don't mean passwords, I mean real strings. I'd like to encrypt a string, store in mysql and then retrieve the decrypted string at a later date. So, I know there is the AES_Encrypt and decrypt functions. But they ask for a key. (which is fine) but I wondering if you call those functions and use your user password as the key. Or something else that is super-simple. Also, is there a simple wrapper for the AES_Encrypt & decrypt functions in Rails? Or do you need to build the query manually?

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• File Encryption Operation

  - by kiruthika

  Hi All, I have doubt in gpg command operation . Actually we are using gpg command for encrypting the file . File.txt has following things. Testing hello world My security things. Now I am doing the file encryption for File.txt gpg --symmetric File.txt Now I got File.txt.gpg file , which is encrypted. My doubt, if some open that file and did someone changes in that I am not able get file content . It says my following things. $ gpg --decrypt File.txt.gpg gpg: no valid OpenPGP data found. gpg: decrypt_message failed: eof I want my file content , even though some body has done changes in that . what should I do for this problem....?

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• Getting started with Express - Error: Cannot find module './routes'

  - by Enrico Tuttobene

  I am just getting started in the world of Node.JS, and I tried using the command line "express" command to install a basic application (with jade support) Now, I was playing around with it a bit to see how it works and I am coming across a strange error: In the /routes directory there is a file called index which contains exports.index = function(req, res){ res.render('index', { title: "Express" }); }; that, as you all know, renders the index page. Well, all I did was renaming that file from index.js to router.js, so that I can easily refer to it as I would like to have more than just an index page. The renaming doesn't work, I get the error Error: Cannot find module './routes' Which is weird, as I though that var express = require('express'), routes = require('./routes'); would require ALL the files in the directory. There must be something small there I'm missing, and please bare with me as I am pretty new to this. Thanks in advance.

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• How would you make a blog with a TDD approach?

  - by Earlz

  I'm considering remaking my blog(currently in PHP, but <100 lines of non-layout code) in Ruby on Rails just for the fun of it. I want to make another project in Rails, but I should learn Rails(more than hello world) before I go to try to create a full project. Another thing I want to do while remaking my blog is to at least figure out what TDD is all about. So how would you go about taking a Test Driven approach to the creation of a blog? What tests would you write? How would you begin? Everytime I visualize writing a blog it'd end up needing a million tests for a single component to fully test it. How do I avoid writing too many tests? Also, I am making this community wiki because I intend for this to basically be made into a mini tutorial/knowledge base...

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• Switch from a View (Login) to another View with a TabBarController

  - by Raphael

  Hi, i'm new at Iphone SDK Developing and now i need some help. I have a LoginView where the User have to authentificate his legitimacy. After he enter his Username and Passwort he click on the "Sign In" Button. Then i want to load my "Real-App". Here is the Problem because i can't switch from the LoginScreen to the TabBarController. I found many solutions but only for switching to other views. Is there a way to do it ?

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• Stop propagating deletes

  - by Mark

  Is it just me or is anyone else finding EF very difficult to use in a real app :( I'm using it as the data layer and have created custom business objects. I'm having difficulty converting the business objects back to EF objects and updating/adding/deleting from the database. Does anyone know a good, simple example of doing this? Actually the current problem that's driving me nuts is when I delete something EF tries to delete other related stuff as well. For example, if I delete an invoice it will also delete the associated customer! Seems odd. I can't figure out how to stop it doing this. // tried: invoiceEfData.CustomerReference = null; // also tried invoiceEfData.Customer = null; context.DeleteObject(invoiceEfData); context.SaveChanges(); // at this point I get a database error due to it attempting to delete the customer

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• aio_write on linux with rtkaio is sometimes long

  - by Drakosha

  I'm using async io on linux with rtkaio library. In my tests everything works perfectly, but, in my real application i see that aio_write which is supposed to return very fast, is very slow. It can take more than 100 milis to write a 128KB to a O_DIRECT padded file. Both my test and the application use same I/O size, i check on the same file system (GFS). I added counting and i see that there are about 50% of async io operations that are short (shorter then 2 milis) and 50% that are long (longer than 2 milis). I also checked that the test and the application both use the same rtkaio library. I'm pretty lost, anyone any ideas where should i look? Another my related question: http://stackoverflow.com/questions/1799537/proc-sys-fs-aio-nr-is-never-higher-than-1024-aio-on-linux

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• Zend_XmlRpc :Failed to parse response error

  - by davykiash

  Am trying to get a simple hello world XMLRPC server setup to work.However I get this Failed to parse response error error when I run the test URL http://localhost/client/index/ on my browser In my Rpc Controller that handles all my XMLRPC calls class RpcController extends Zend_Controller_Action { public function init() { $this->_helper->layout->disableLayout(); $this->_helper->viewRenderer->setNoRender(); } public function xmlrpcAction() { $server = new Zend_XmlRpc_Server(); $server->setClass('Service_Rpctest','test'); $server->handle(); } } In my client Controller that calls the XMLRPC Server class ClientController extends Zend_Controller_Action { public function indexAction() { $clientrpc = new Zend_XmlRpc_Client('http://localhost/rpc/xmlrpc/'); //Render Output to the view $this->view->rpcvalue = $clientrpc->call('test.sayHello'); } } In my Service_Rpctest function <?php class Service_Rpctest { /** * Return the Hello String * * @return string */ public function sayHello() { $value = 'Hello'; return $value; } } What am I missing?

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• Separation of logic from presentation: HTTP variable names?

  - by Allan Jardine

  Hello all, This could probably be considered an academic question, rather than a real world one - but throwing it out to see if anyone has any great ideas! We all know that keeping the business logic of an application separate from the presentation is a good idea (I'm looking at web-apps atm), but there needs to be an understanding between the business logic for what HTTP variables to expect (and then process) and the variable names which are sent by the presentation layer. Is this simply a matter of telling the designer what variable names to use in a template? The template doesn't need to know what the variable names are (unless using them for JS/CSS selectors), so why should they be 'hardcoded' in there. Or should the business logic put the names into variables to be printed out? Another layer of complexity for the templates? Does anyone have any experience of this, or thoughts on how to deal with it? Thanks, Allan

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• Why javascript IF only works one time?

  - by Emily

  I have javascript code which copy the value of input file and past it in the text box in real time. <script> function copyit(){ var thephoto=document.getElementById('thephoto').value; var fileonchange=document.getElementById('fileonchange').value; if(!thephoto==fileonchange){ document.getElementById('fileonchange').value=thephoto; } } window.setInterval("copyit()", 500); </script> Choose File : <input type="file" id="thephoto"><br> Here Is the file name : <input type="text" id="fileonchange"> Sadly this only works one time and then stops pasting the value when changing the file again. ( i mean you should reload the page to works again) Is IF has a cache or something? you can try the code by yourself to see. Thank you all

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• Why Am I Getting MySQL Error #1312 when Using a Simple Stored Procedure?

  - by Laxmidi

  Hi, I'm trying to learn how to use MySQL stored procedures. MySQL accepted my procedure: CREATE PROCEDURE SimpleProc() BEGIN SELECT * FROM myTable; END (In phpMyAdmin, I set // for delimiter. The real version has the name of an actual table instead of myTable.). But, when I call the procedure with CALL SimpleProc();, I get error "#1312 - PROCEDURE mydb.SimpleProc can't return a result set in the given context". I read that some versions of php or phpMyAdmin won't work with stored procedures. I'm using a localhost running on a Mac with MAMP 1.9. I've got MySQL 5.1.44, PHP 5.2.13 & 5.3.2, phpMyAdmin 3.2.5. Does anyone know if stored procedures will work with my set-up? Am I doing something incorrectly? Any advice? Shout out to the Big Red for a triple overtime victory in Lax. Thanks, Laxmidi

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• C# switch: case not falling through to other cases limitation

  - by Mike Fielden

  This question is kind of an add-on to this question In C#, a switch case cannot fall through to other cases, this causes a compilation error. In this case I am just adding some number to the month total for the selected month and each subsequent month thereafter. (simple example, not meant to be real) switch (month) { case 0: add something to month totals case 1: add something to month totals case 2: add something to month totals default: break; } Is there a logical alternative to this in C# without having to write out a ton of if statements? if (month <= 0) add something to month if (month <= 1) add something to month if (month <= 2) add something to month .... etc

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• Changing content of HTMLDocument displayed in a JTextPane

  - by kayahr

  I'm displaying some tables as HTML code (rendered by a Freemarker template) with a JTextPane. I also have some HTML links in this HTML output which can be used to interact with the values of the table (For example "Delete a row" and stuff like this). Currently I always recreate the whole HTML output on each change and replace the whole document in the JTextPane with the new one. This is getting really slow and the JTextPane always changes the scroll position when I do this. Is it possible to change only parts of the HTML code during runtime without replacing the whole document? In a real browser I would use the DOM and do something like document.getElementById("price").innerHTML = "$123.44". Is something like that possible with the HTMLDocument in a JTextPane?

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• svn commit is hung at start of commit

  - by jwhitlock

  I'm commiting a large changeset, including a large binary file (180 MB) over a slow VPN connection. It looks for all the world like it is stalled. How can I diagnose where it is stuck? The output is: $ svn commit -m "My commit message" Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)` Local subversion is 1.6.9 on Linux, KDE 4.3, and svn status shows ML . L ws M ws/manage.py L ws/locales L ws/locales/ja_JP L ws/locales/ja_JP/LC_MESSAGES The process isn't using much of any resources. The server is Linux, served by Apache and mod_dav_svn, same subversion 1.6.9. I can't see any process that is handling the commit.

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• Your experience on using configuration & VCS tools

  - by smalldream

  I am doing my study's final year project and would like to do a little survey here. The topic is about configuration management and version control system for an industrial product (such as a piece of software, a furniture design, a car engine or even an aeroplane design etc...) 1.) What is you field of expertise (IT, engineering, manufactuing etc..) and what is the configuration management and version control system you use (previously or now) for your work? 2.) What is your opinion/comment (good, bad, what is it lack of or what can be improve etc...) about them? Much appreciated if you can include some real life examples for your opinion/comment. Of course you are welcome also if you simply wish to share your thought on the current configuration management and version control system in market. Thanks all in advance for your help.

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• Word Jumble Algorithm

  - by MasterMax1313

  Given a word jumble (i.e. ofbaor), what would be an approach to unscramble the letters to create a real word (i.e. foobar)? I could see this having a couple of approaches, and I think I know how I'd do it in .NET, but I curious to see what some other solutions look like (always happy to see if my solution is optimal or not). This isn't homework or anything like that, I just saw a word jumble in the local comics section of the paper (yes, good ol' fashioned newsprint), and the engineer in me started thinking.

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• How can I make my Ruby on Rails 2.3.4 application "Rails 3-ready"

  - by marcgg

  I'm developing an application with Ruby on Rails that I want to maintain for at least a few years, so I'm concerned about the next version coming up soon. Going from Rails 1 to Rails 2 was such a big pain that I didn't bother and froze my gems and let the application die, alone, in the dark. On this project I don't want to do that. First because this new version looks awesome, but also because this application may turn into a real product. How can I prepare my application so that it will be upgradable with as little changes as possible. How time consuming do you think switching version will be? And what about my server? Deployment? I'm already looking at deprecation notices... what else can I do?

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• Generating JavaDoc style documentation

  - by Walter White

  Hi all, I would like to generate a report similar to JavaDoc so that you can real easily click on a test, result, and source. I am running HtmlUnit tests so I will have the result (html), source (request, headers, parameters, etc.), stack trace all visible so a developer or qa can go back later to review this to see what went awry. So, in the left frame, the tests will be listed along with the group they were a part of (similar to packages in javadoc). In the right frame, the results will be presented along with the source and stack trace. How can I achieve this? The HtmlUnit tests are part of the project and not a stand-alone plugin if that matters. Thanks, Walter

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• Automatically deleting pyc files when corresponding py is moved (Mercurial)

  - by Oddthinking

  (I foresaw this problem might happen 3 months ago, and was told to be diligent to avoid it. Yesterday, I was bitten by it, hard, and now that it has cost me real money, I am keen to fix it.) If I move one of my Python source files into another directory, I need to remember to tell Mercurial that it moved (hg move). When I deploy the new software to my server with Mercurial, it carefully deletes the old Python file and creates it in the new directory. However, Mercurial is unaware of the pyc file in the same directory, and leaves it behind. The old pyc is used preferentially over new python file by other modules in the same directory. What ensues is NOT hilarity. How can I persuade Mercurial to automatically delete my old pyc file when I move the python file? Is there another better practice? Trying to remember to delete the pyc file from all the Mercurial repositories isn't working.

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• Unique identifiers for users

  - by Christopher McCann

  If I have a table of a hundred users normally I would just set up an auto-increment userID column as the primary key. But if suddenly we have a million users or 5 million users then that becomes really difficult because I would want to start becoming more distributed in which case an auto-increment primary key would be useless as each node would be creating the same primary keys. Is the solution to this to use natural primary keys? I am having a real hard time thinking of a natural primary key for this bunch of users. The problem is they are all young people so they do not have national insurance numbers or any other unique identifier I can think of. I could create a multi-column primary key but there is still a chance, however miniscule of duplicates occurring. Does anyone know of a solution? Thanks

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