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• Ruby from the command line - sticking - Windows

  - by tyndall

  I have seen this behavior on Windows with Ruby for a long time. If I install a gem sometimes the command line will just get "lost" and stop printing output until you go back to the command line and hit enter a few times. I notice this in other places too. Like starting up a Ruby on Rails console. Or generating a model with Rails. Have other people seen this? What causes this? The weird thing is this doesn't happen all the time. I have never seen this with PHP, Lua, Perl or Python from the command line. I have seen this on Vista and Windows 7 (32-bit and 64-bit). This happens on multiple machines.

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• Display/Edit fields across tables in a Django Form

  - by jamida

  I have 2 tables/models, which for all practical purposes are the same as the standard Author/Book example, but with the additional restriction that in my application each Author can only write 0 or 1 books. (eg, the ForeignKey field in the Book model is or can be a OneToOneField, and there may be authors who have no corresponding book in the Book table.) I would like to be able to display a form showing multiple books and also show some fields from the corresponding Author table (eg author_name, author_address). I followed the example of the inlineformset and but that doesn't even display the author name in the generated form.

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• Postgresql - one database for everyone, or one-database per customer

  - by user337876

  I'm working on a web-based business application where each customer will need to have their own data (think basecamphq.com type model) For scalability and ease-of-upgrades, I'd prefer to have a single database where each customer gets a filtered version of the data. The problem is how to guarantee that they stay sandboxed to their own data. Trying to enforce it in code seems like a disaster waiting to happen. I know Oracle has a way to append a where clause to every query based on a login id, but does Postgresql have anything similar? If not, is there a different design pattern I could use (like creating a view of each table for each customer that filters)? Worse case scenario, what is the performance/memory overhead of having 1000 100M databases vs having a single 1Tb database? I will need to provide backup/restore functionality on a per-customer basis which is dead-simple on a single database but quite a bit trickier if they are sharing the database with other customers.

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• Jython project in Eclipse can't find the Jython library, but works in an identical project

  - by Rob Lourens

  I have two projects in Eclipse with Java and Python code, using Jython. Also I'm using PyDev. One project can import and use the xml module just fine, and the other gives the error ImportError: No module named xml. As far as I can tell, all the project properties are set identically. The working project was created from scratch and the other comes from code checked out of an svn repository and put into a new project. What could be the difference?

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• gethostname() returns accurate hostname, bind() doesn't like it

  - by user2072848

  Doing a python socket tutorial, entire codebase is as follows import socket as so s = so.socket() host = so.gethostname() port = 12345 s.bind((host, port)) s.listen(5) while True: c, addr = s.accept() print 'Got connection from', addr c.send('Thank you for connecting') c.close() and error message: Traceback (most recent call last): File "server.py", line 13, in <module> s.bind((host, port)) File "/Users/solid*name*/anaconda/lib/python2.7/socket.py", line 224, in meth return getattr(self._sock,name)(*args) socket.gaierror: [Errno 8] nodename nor servname provided, or not known Printing hostname gives me super*name* Which is, in fact, my computer's hostname.

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• Can XMLCatalog be used for schema imports?

  - by jon077

  Can you use XMLCatalog to resolve xsds in schema import statements? If so, what is the preferred/best practice? I want to package the xsds in a jar, so using a relative schemaLocation has not worked. So far I am trying to do something like: SchemaFactory factory = SchemaFactory .newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI); XMLCatalogResolver catalogResolver = new XMLCatalogResolver( new String[]{"/path/to/catalog.xml"}); factory.setResourceResolver(catalogResolver); Schema schema = factory.newSchema(new StreamSource(ClassLoader .getSystemResourceAsStream("config.xsd"))); Without much luck.

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• Sending ExtJS datastore parameter to CI controller

  - by Davi

  Hi all, I'm new to ExtJS and I'm stuck with ExtJS datastore. I'm using ExtJS with CodeIgniter and I want to send ExtJS datastore.load() parameter to my codeigniter's controller to process some query. How can I do that? Here is my ExtJS datastore proxy: var dataProxy = new Ext.data.HttpProxy({ url: 'index.php/cStart/js_listPegawai/', method: 'POST' }); and this is my controller code: var $queryNama = ""; function js_listPegawai() { $this->load->model('MPegawai'); $Pegawai = $this->MPegawai->listPegawai($queryNama); } Thanks for any suggestions..

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• drupal what if we have designed a content type with existing fields

  - by rakeshakurathi

  i have small problem.... i have one content type say cars with various fields, say more than 30 , user can create the content types... now i would like to show only few fields in different phases,is there any possibility to do that. more explantaion:- user may enter the car model and car details in the first page and upload images in second page.(say a popup in the block) is this is possible ? i m newbie to drupal, i would like to do this kind of data updation, i though with designing a one more content type with the existing fields, can any one explain this issue... what if i design a content type car1 with same fields say(file uplaod) in car content type.

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• Applescript access to last.fm app via application icon in menu bar

  - by Mark

  Hi, I want to create an Applescript to drive the last.fm player app. I'm trying to do this via last.fm application icon in the menu bar rather than using the main application menus, as this approach (I think) won't cause last.fm to switch to the foreground. The overall plan is to bind my script to a quicksilver trigger so I can stop|start|skip|love|ban|tag tracks from the keyboard. My problem is I can't find what UI element to bind the applescript to. I've used UI Browser to scan through the UI object model but it draws a blank with the last.fm icon in the menu bar. Any thoughts appreciated.

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• VS 2010 Server Explorer Database Showing No Tables

  - by Andy

  I'm working on a .Net application that needs to read from an Oracle 10g database behind Siebel. In VS 2010 Server Explorer, I've created a connection using the OracleClient type connector with a reference to the Oracle TNS service name as the "server name." The "Test Connection" button shows that the connection is successful. However, in the Server Explorer, when I go to expand the Tables, no tables are shown. I know for a fact that there are 3000+ tables in the database (thanks Siebel). Anyone know what's happening here? I'd like to create an Entity Framework 4.0 Entity Data Model... Thanks for the help! Andy

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• java: Preferences API vs. Apache Commons Configuration

  - by Jason S

  I need to allow the user to store/load an arbitrary number of lists of objects (assume they are Serializable). Conceptually I want a data model like class FooBean { /* bean stuff here */ } class FooList { final private Set<FooBean> items = new HashSet<FooBean>(); public boolean add(FooBean item) { return items.add(item); } public boolean remove(FooBean item) { return items.remove(item); } public Collection<FooBean> getItems() { return Collections.unmodifiableSet(items); } } class FooStore { public FooStore() { /* something... uses Preferences or Commons Configuration */ } public FooList load(String key) { /* something... retrieves a FooList associated with the key */ } public void store(String key, FooList items) { /* something... saves a FooList under the given key */ } } Should I use the Preferences API or Commons Config? What's the advantages of each?

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• Retrieving cached data from existing Crystal Reports file

  - by TimS

  Is there any way to retrieve the cached data from a previously refreshed report and say, dump it to a file? Basically, I'm looking for the dataset that is being used by the report, and hand-dragging each field onto the canvas or even exporting the file doesn't quite get me where I want. I'm not particular to a specific solution, be it .NET, vbscripting or even within the program itself... I'm not overly familiar with the Crystal Report object model, nor .NET, but it seems like with a setting like "EnableSaveDataWithReport", there ought to be a straightforward way. Oh, and I'm on CR 11 Pro

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• Rails: creating a custom data type / creating a shorthand

  - by Shyam

  Hi, I am wondering how I could create a custom data type to use within the rake migration file. Example: if you would be creating a model, inside the migration file you can add columns. It could look like this: def self.up create_table :products do |t| t.column :name, :string t.timestamps end end I would like to know how to create something like this: t.column :name, :my_custom_data_type The reason for this to create for example a "currency" type, which is nothing more than a decimal with a precision of 8 and a scale of 2. Since I use only MySQL, the solution for this database is sufficient enough. Thank you for your feedback and comments!

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• serializing JSON files with newlines in Python

  - by user248237

  I am using json and jsonpickle sometimes to serialize objects to files, using the following function: def json_serialize(obj, filename, use_jsonpickle=True): f = open(filename, 'w') if use_jsonpickle: import jsonpickle json_obj = jsonpickle.encode(obj) f.write(json_obj) else: simplejson.dump(obj, f) f.close() The problem is that if I serialize a dictionary for example, using "json_serialize(mydict, myfilename)" then the entire serialization gets put on one line. This means that I can't grep the file for entries to be inspected by hand, like I would a CSV file. Is there a way to make it so each element of an object (e.g. each entry in a dict, or each element in a list) is placed on a separate line in the JSON output file? thanks.

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• Is it an MD5 digest in this Python script?

  - by brilliant

  Hello, I am trying to understand this simple hashlib code in Python that has been given to me the other day on "Stackoverflow": import hashlib m = hashlib.md5() m.update("Nobody inspects") m.update(" the spammish repetition here") m.digest() '\xbbd\x9c\x83\xdd\x1e\xa5\xc9\xd9\xde\xc9\xa1\x8d\xf0\xff\xe9' m.digest_size 16 m.block_size 64 print m I thought that "print m" would show me the MD5 digest of the phrase: "Nobody inspects the spammish repetition here", but as a result I got this line on my local host: <md5 HASH object @ 01806220> Strange, when I refreshed the page, I got another line: <md5 HASH object @ 018062E0> and every time when I refresh it, I get another value: md5 HASH object @ 017F8AE0 md5 HASH object @ 01806220 md5 HASH object @ 01806360 md5 HASH object @ 01806400 md5 HASH object @ 01806220 Why is it so? I guess, what I have in each line flowing "@" is not really a digest. Then, what is it? And how can I display MD5 digest here in this code? My python version is Python 2.5 and the framework I am currently using is webapp (I have downloaded it together with SDK from "Google App Engine")

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• Creating WCF DataContracts dynamically from code

  - by Fredrik Tonn

  Given the fact that I have a fully dynamic object model, that is, I have no concrete classes defined anywhere in code, but I still want to be able to create WCF DataContracts for them so I can use them in operations. How can I achieve this? My concrete class "Entity" implements ICustomTypeDescriptor which is used to present the various properties to the outside world, but my expeimentation with WCF suggests that WCF does not care about ICustomTypeDescriptor. Is this correct or have I missed something? Is this possible? It cannot be so that the only way to create a DataContract is to actually have a concrete harcoded class, can it?

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• How to get image capture date and video duration when uploading files using SWFUpload and Paperclip

  - by Hatem

  Hi Guys, I'm using SWFUpload and Paperclip on Rails 2.3.5 to upload images and videos. How can I store the capture date of images and duration of videos? The following works correctly in irb: irb(main):001:0> File.new('hatem.jpg').mtime => Tue Mar 09 16:56:38 +0200 2010 But when I try to use Paperclip's before_post_process: before_post_process :get_file_info def get_file_info puts File.new(self.media.to_file.path).mtime # =>Wed Apr 14 18:36:22 +0200 2010 end I get the current date instead of the capture date. How can I fix this? Also, how can I get the video duration and store it with the model? Thank you.

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• Where does the ObjectDataSource cache data?

  - by Jeremy

  I'm considering using an ObjectDataSource as an intermediate between my page controls and my data access layer & object model. Traditionally I have manually created the object and populate it via a series of findcontrol statements when I need to insert/update data in the database. I'm hoping that I can use the ObjectDataSource to marshal data between my object and my controls, eliminating that manual code, as long as the ObjectDataSource doesn't come with a lot of overhead. I noticed the EnableCaching property, where does the caching occure? is it in view state?

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• using WrapCompressedRTFStream in C#

  - by Code Smack

  Hello, I am rewording this question: Csharp C# visual studio 2008 How do I use the WrapCompressedRTFStream when using DLLImport with mapi32.dll? Sample of code to import the WrapCompressedRTFStream method. (I found this, I did not figure this part out) [DllImport("Mapi32.dll", PreserveSig = true)] private static extern void WrapCompressedRTFStream( [MarshalAs(UnmanagedType.Interface)] UCOMIStream lpCompressedRTFStream, uint ulflags, [MarshalAs(UnmanagedType.Interface)] out UCOMIStream lpUncompressedRTFStream ); public const uint MAPI_MODIFY = 0x00000001; public const uint STORE_UNCOMPRESSED_RTF = 0x00008000; How do I use this in my c# application when my compressedRichText is stored in a string.

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• Facebook publish HTTP Error 400 : bad request

  - by Abhishek

  Hey I am trying to publish a score to Facebook through python's urllib2 library. import urllib2,urllib url = "https://graph.facebook.com/USER_ID/scores" data = {} data['score']=SCORE data['access_token']='APP_ACCESS_TOKEN' data_encode = urllib.urlencode(data) request = urllib2.Request(url, data_encode) response = urllib2.urlopen(request) responseAsString = response.read() I am getting this error: response = urllib2.urlopen(request) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 124, in urlopen return _opener.open(url, data, timeout) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 389, in open response = meth(req, response) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 502, in http_response 'http', request, response, code, msg, hdrs) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 427, in error return self._call_chain(*args) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 361, in _call_chain result = func(*args) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 510, in http_error_default raise HTTPError(req.get_full_url(), code, msg, hdrs, fp) urllib2.HTTPError: HTTP Error 400: Bad Request Not sure if this is relating to Facebook's Open Graph or improper urllib2 API use.

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• NHibernate custom connection string configuration

  - by user177883

  I have a c# library project, that i configured using nhibernate, and I like people to be able to import this project and use the project. This project has FrontController that does all the work. I have a connection string in hibernate config file and in app.config file of another project. it would be nice for anyone to be able to set the connection string into this library project and use it. such as through a method which will take the connectiong string as parameter. or when creating a new instance of FrontController to pass the connection string to constructor. or if you have a better idea. How to do this? I d like this class library to use the same database of the project that s imported. How to set hibernate connection string programatically? same idea for log4net.

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• double checked locking - objective c

  - by bandejapaisa

  I realised double checked locking is flawed in java due to the memory model, but that is usually associated with the singleton pattern and optimizing the creation of the singleton. What about under this case in objective-c: I have a boolean flag to determine if my application is streaming data or not. I have 3 methods, startStreaming, stopStreaming, streamingDataReceived and i protect them from multiple threads using: - (void) streamingDataReceived:(StreamingData *)streamingData { if (self.isStreaming) { @synchronized(self) { if (self.isStreaming) { - (void) stopStreaming { if (self.isStreaming) { @synchronized(self) { if (self.isStreaming) { - (void) startStreaming:(NSArray *)watchlistInstrumentData { if (!self.isStreaming) { @synchronized(self) { if (!self.isStreaming) { Is this double check uneccessary? Does the double check have similar problems in objective-c as in java? What are the alternatives to this pattern (anti-pattern). Thanks

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• What kind of knowledge you need to invent a new programming language?

  - by systempuntoout

  I just finished to read "coders at works", a brilliant book by Peter Seibel with 15 interviews to some of the most interesting computer programmers alive today. Well, many of the interviewees have (co)invented\implemented a new programming language. For example: * Joe Armstrong: Inventor of Erlang * L. Peter Deutsch: implementer of Smalltalk-80 * Brendan Eich: Inventor of JavaScript * Dan Ingalls: Smalltalk implementor and designer * Simon Peyton Jones: Coinventor of Haskell * Guy Steele: Coinventor of Scheme Is out of any doubt that their minds have something special and unreachable, and i'm not crazy to think i will ever able to create a new language; i'm just interested in this topic. So, imagine a funny\grotesque scenario where your crazy boss one day will come to your desk to say "i want a new programming language with my name on it..take the time you need and do it", what will you start to study? What kind of knowledge do you need to model, design and implement a brand new programming language?

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• DefaultSchedulerService in ASP.NET application

  - by Samir P

  Hi, My project has a requirement to implement look-ahead caching i.e. triggering another request on invokation of a specific request. The following details in short the implementation - HttpModule parses the SOAPRequest and matches entry in a configuration file for look-ahead candidate. If the request matches, it prepares the Parameters dictionary and starts appropriate workflow. Single workflow runtime is used across all requests is ensured through initializing the runtime instance at Application_Start event and stored in Application Dictionary. Using persistence service and DefaultScheduler service. We can't implement windows service model, as current requirement mandates passing the SOAPRequest parameters as arguments. ManualSchedulerService is not in contention due to synchronous nature of it's actual behaviour. Still the performance is pretty bad and product team is not happy. Can anybody suggest me better solution? Thanks, Samir

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• How can I prompt for input using Selenium/Webdriver and use the result?

  - by Tempus

  I would like to allow for user input and make some decisions based on it. If I do this: driver.execute_script("prompt('Enter smth','smth')") I get a nice prompt, but I cannot use it's value. Is there any way of showing an input box to the user, and use the value typed there? EDIT: This is my script: from selenium.webdriver import Firefox if __name__ == "__main__": driver = Firefox() driver.execute_script("window.promptResponse=prompt('Enter smth','smth')") a = driver.execute_script("var win = this.browserbot.getUserWindow(); return win.promptResponse") print "got back %s" % a And this exits with the following exception: a = driver.execute_script("var win = this.browserbot.getUserWindow(); return win.promptResponse") File "c:\python26\lib\site-packages\selenium-2.12.1-py2.6.egg\selenium\webdriver\remote\webdriver.py", line 385, in ex ecute_script {'script': script, 'args':converted_args})['value'] File "c:\python26\lib\site-packages\selenium-2.12.1-py2.6.egg\selenium\webdriver\remote\webdriver.py", line 153, in ex ecute self.error_handler.check_response(response) File "c:\python26\lib\site-packages\selenium-2.12.1-py2.6.egg\selenium\webdriver\remote\errorhandler.py", line 110, in check_response if 'message' in value: TypeError: argument of type 'NoneType' is not iterable What am I not doing right?

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