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• How to save big "database-like" class in python

  - by Rafal

  Hi there, I'm doing a project with reasonalby big DataBase. It's not a probper DB file, but a class with format as follows: DataBase.Nodes.Data=[[] for i in range(1,1000)] f.e. this DataBase is all together something like few thousands rows. Fisrt question - is the way I'm doing efficient, or is it better to use SQL, or any other "proper" DB, which I've never used actually. And the main question - I'd like to save my DataBase class with all record, and then re-open it with Python in another session. Is that possible, what tool should I use? cPickle - it seems to be only for strings, any other? In matlab there's very useful functionality named save workspace - it saves all Your variables to a file that You can open at another session - this would be vary useful in python!

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• ObjectDataSource DataObjectTypeName Help. Pass object as parameter

  - by Kettenbach

  I have a partial class (the main class is a LinqToSql generated class) <DataObject(True)> _ Partial Public Class MBI_Contract <DataObjectMethod(DataObjectMethodType.Select, True)> _ Public Shared Function GetCancelableContracts(ByVal dealer As Dealer) As List(Of MBI_Contract) Return Utilities.GetCancelableContractsForDealer(dealer) End Function End Class Here is the method it's calling Public Function GetCancelableContractsForDealer(ByVal dealer As Dealer) As List(Of MBI_Contract) Dim db As TestDataContext = TestDataContext.Create() Return (From mbi As MBI_Contract In db.MBI_Contracts _ Where mbi.MBI_DealerNumber = dealer.DealerNumber _ AndAlso mbi.MBI_PaidFor = True _ AndAlso mbi.MBI_Deleted = False).ToList() End Function I want to use the ObjectDataSource to drive a DropDownList. <asp:ObjectDataSource ID="contractOds" runat="server" TypeName="MBI_Contract" SelectMethod="GetCancelableContracts" DataObjectTypeName="Dealer"> </asp:ObjectDataSource> My aspx page has a Dealer property that is set in a BasePage. My question is how can I pass this property(object) to the ObjectDataSource, so it can be evaluated in my select method. Does anyone know how I can do this? Or am I totally doing this the wrong way? Thanks for any Advice, Cheers, ~ck in San Diego

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• Catching Oracle Errors in Django

  - by Dashdrum

  My Django app runs on an Oracle database. A few times a year, the database is unavailable because of a scheduled process or unplanned downtime. However, I can't see how to catch the error a give a useful message back to the requester. Instead, a 500 error is triggered, and I get an email (or hundreds) showing the exception. One example is: File "/opt/UDO/env/events/lib/python2.6/site-packages/django/db/backends/oracle/base.py", line 447, in _cursor self.connection = Database.connect(conn_string, **conn_params) DatabaseError: ORA-01035: ORACLE only available to users with RESTRICTED SESSION privilege I see a similar error with a different ORA number when the DB is down. Because the exception is thrown deep within the Django libraries, and can be triggered by any of my views or the built in admin views, I don't know where any exception trapping code would go. Any suggestions?

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• Is it possible to use IPC inside of a IE8 Browser Helper Object?

  - by Joel

  I need to communicate with a Service using IPC from inside of a Browser Helper Object (registered with IE8). Unfortunately, all of this communication is done through an Assembly API that I have no control over. Whenever this API starts up I get the following error: ExceptionSystem.Runtime.Remoting.RemotingException: Failed to connect to an IPC Port: The system cannot find the file specified. I realize that it is difficult to discern what the issue is without source. However I am curious if anyone knows of anything sort of permissions or DLL issues that would prevent IPC from working in this case.

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• Build dynamic LINQ?

  - by d daly

  Hi Im using #LINQ# to query data, but can anyone tell me how to build the query dynamically, if the user only wants to report on say 1 of the 3 fields? (see below) Thanks DD var query = from cl in db.tblClaims join cs in db.tblCases on cl.ref_no equals cs.ref_no where cl.claim_status == "Appeal" && cl.appeal_date >= Convert.ToDateTime(txtReferedFromDate.Text) && cl.appeal_date <= Convert.ToDateTime(txtReferedToDate.Text) && cs.referred_from_lho == dlLHO.Text && cs.adviser == dlAdviser.Text select new { Ref = cs.ref_no, ClaimType = cl.claim_type, ClaimStatus = cl.claim_status, AppealDate = cl.appeal_date }; gvReport.DataSource = query;

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• How can I programmatically read a Adobe DRM'd Epub?

  - by DEzra

  I am writing an ebook reader that supports the epub format (i have the parsing of open epub working), but I would like to support the reading of Adobe DRM locked epubs. I have read through the Adobe digital editions site (faq and support pages) and googled, but alas as yet I have not found any docs on the API to: authorise the PC using the user's Adobe ID credentials and decrypt the epub for parsing by my app. Does anyone have any pointers to docs or APIs? I would prefer APIs in Python, C++. But any API is better than nothing ;-) UPDATE1: I am writing my app on Desktops (linux, mac and windows). UPDATE2: Just to be clear, I am assuming that user has paid for the book legitimately and so does have an Adobe ID. I don't want to crack the DRM, just allow the user to read their books that they bought.

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• How to make Date locale-independent? (GMT timezone newbie question)

  - by folone

  I have a db, that stores dates in OleDateTime format, in GMT timezone. I've implemented a class, extending Date in java to represent that in classic date format. But my class is locale-dependent (I'm in GMT+2). Therefore, it converts the date in the db as date - 2 hours. How do I make it convert the date correctly? I want my class to be locale-independent, always using GMT timezone. Actually, the question is: class MyOleDateTime extends Date { static { Locale.setDefault(WhatGoesHere?) } // ... some constructors // ... some methods }

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• Configuration manager for PHP

  - by Jack

  I am working on code re-factoring of configuration file loading part in PHP. Earlier I was using multiple 'ini' files but now I plan to go for single XML file which will be containing all configuration details of the project. Problem is, if somebody wants configuration file in ini or DB or anything else and not the default one (in this case XML), my code should handle that part. If somebody wants to go for other configuration option like ini, he will have to create ini file similar to my XML configuration file and my configuration manager should take care everything like parsing, storing in cache. For that I need a mechanism lets say proper interface for my configuration data where the underlying data store can be anything( XML, DB, ini etc) also I don't want it to be dependent on these underlying store and anytime in future this should be extensible to other file formats.

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• How to call Ajax to run a PHP file while maintaining PHP & Javascript variables.

  - by Umar

  Hi Stackoverflowers. I'm using the Facebook php-sdk to get the users name and friends, right now the loading friends part takes about +3 seconds so I wanted to do it via Ajax, e.g. so the document can load and jQuery then calls an external PHP script which loads the friends (their names and their profile pictures). So to do this I did: $(document).ready(function() { var loadUrl = "http://localhost/fb/getFriends.php" ; $("#friends") .html("Hold on, your friends are loading!") .load(loadUrl); }); But I get a PHP error: Fatal error: Call to a member function api() on a non-object If I do this in the same PHP file (so I don't use Ajax at all to call it) it works fine. Now I think I understand the reason this is happening, but I don't know how to fix it. In my main index.php file I have a bunch of init and session code e.g. FB.init({ appId : '<?php echo $facebook->getAppId(); ?>', session : <?php echo json_encode($session); ?>, // don't refetch the session when PHP already has it status : true, // check login status cookie : true, // enable cookies to allow the server to access the session xfbml : true // parse XFBML }); So I'm just wondering what is the best way to treat my new separate PHP file getFriends.php in a way where it has access to all PHP/JavaScript session data/variables? If you haven't used the Facebook php-sdk I'll quickly explain what I mean: Lets say I have index.php and getUsername.php, from index.php I want to retrieve the getUsername.php file via Ajax using .load. Now the problem is getUsername.php needs to access PHP session data/Javascript Init functions which were created in index.php, so I'm thinking of ways to solve this (I'm new to PHP so sorry if this sounds silly) but I'm thinking maybe I could do a POST in jQuery Ajax and post the session data? Or maybe I could create a PHP class, so something like: class getUsername extends index{} /*Yes I'm a newbie*/ If you have a look at the php-sdk example.php link posted at the top maybe you'd better understand what variables exactly need to be accessed from a new file. Also on a different note, I'm using PHP to work out page rendering times and it seems that fetching the users name alone : // Session based API call. if ($session) { try { $uid = $facebook->getUser(); $me = $facebook->api('/me'); } catch (FacebookApiException $e) { error_log($e); } } Can take a good 4 seconds, is this normal? Once I get the users details is it good to cache it or something? -Speed isn't as important right now, for now I'm just trying to figure out this Ajax-separating php files thing. Woah this is a long post. Thanks very much for your time.

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• Detecting when Bluetooth is disabled on iOS5

  - by Non Umemoto

  I'm developing blog speaker app. I wanna pause the audio when bluetooth is disabled like iPod app. I thought it's not possible without using private api after reading this. Check if Bluetooth is Enabled? But, my customer told me that Rhapsody and DI Radio apps both support it. Then I found iOS5 has Core Bluetooth framework. https://developer.apple.com/library/ios/documentation/CoreBluetooth/Reference/CoreBluetooth_Framework/CoreBluetooth_Framework.pdf CBCentralManagerStatePoweredOff status seems like the one. But, the description says this api only supports Bluetooth 4.0 low energy devices. Did anyone try doing the same thing? I want to support current popular bluetooth headsets, or bluetooth enabled steering wheel on the car. I don't know if it's worth trying when it only supports some brand new bluetooth.

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• How do I access a JavaFX 1.3 static class member from Java?

  - by James

  I want to access a static JavaFX class member from Java using the Javafx reflection API. E.g. JavaFX code: var thing; class MyJavaFXClass { } Java code: private Object getThing() { FXClassType classType = FXContext.getInstance().findClass("mypackage.MyJavaFXClass"); // Get static member 'thing' from 'MyJavaFXClass' // <Insert Code Here> return thing; } What Java code do I need to access 'MyJavaFXClass.thing'? Note: I am using JavaFX 1.3 - I'm not sure if the reflection API is different here to earlier JavaFX versions.

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• Importing a large delimited file to a MySQL table

  - by Tom

  I have this large (and oddly formatted txt file) from the USDA's website. It is the NUT_DATA.txt file. But the problem is that it is almost 27mb! I was successful in importing the a few other smaller files, but my method was using file_get_contents which it makes sense why an error would be thrown if I try to snag 27+ mb of RAM. So how can I import this massive file to my MySQL DB without running into a timeout and RAM issue? I've tried just getting one line at a time from the file, but this ran into timeout issue. Using PHP 5.2.0. Here is the old script (the fields in the DB are just numbers because I could not figure out what number represented what nutrient, I found this data very poorly document. Sorry about the ugliness of the code): <? $file = "NUT_DATA.txt"; $data = split("\n", file_get_contents($file)); // split each line $link = mysql_connect("localhost", "username", "password"); mysql_select_db("database", $link); for($i = 0, $e = sizeof($data); $i < $e; $i++) { $sql = "INSERT INTO `USDA` (1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17) VALUES("; $row = split("\^", trim($data[$i])); // split each line by carrot for ($j = 0, $k = sizeof($row); $j < $k; $j++) { $val = trim($row[$j], '~'); $val = (empty($val)) ? 0 : $val; $sql .= ((empty($val)) ? 0 : $val) . ','; // this gets rid of those tildas and replaces empty strings with 0s } $sql = rtrim($sql, ',') . ");"; mysql_query($sql) or die(mysql_error()); // query the db } echo "Finished inserting data into database.\n"; mysql_close($link); ?>

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• Replacement for PHP's __autoload function?

  - by Josh

  I have read about dynamically loading your class files when needed in a function like this: function __autoload($className) { include("classes/$className.class.php"); } $obj = new DB(); Which will automatically load DB.class.php when you make a new instance of that class, but I also read in a few articles that it is bad to use this as it's a global function and any libraries that you bring into your project that have an __autoload() function will mess it up. So does anyone know of a solution? Perhaps another way to achieve the same effect as __autoload()? Until I find a suitable solution I'll just carry on using __autoload() as it doesn't start becoming a problem until you bring in libraries and such. Thanks.

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• Unable to get the DspStatus Field in the Task document properties.

  - by Pari

  Hi, I am using Interop.Domino.dll API to read the NSF file and able to read the properties of the Task Document. When i view the Task Document properties in the Lotus Notes, i am able to view the Status Field, Importance Field and few others, but when i programatically dump all the Field Names and their values i am unable to get few of them as mentioned above. So, how to get all the Field Names and their values as i iterate through all the document properties. Is this the problem of IBM Lotus Notes Application or the Domino API ? Here is my sample code to iterate the TODO document properties : object[] TaskItems = docTodoDoc.Items as object[]; foreach (NotesItem objItem in TaskItems) { m_objLogFile.Debug(objItem.Name + " - "); m_objLogFile.Debug("Values :: " + ((object[])docTodoDoc.GetItemValue(objItem.Name))[0] as String); } Please help me out to over come this issue as i need to access the status value of the TODO Item from the NSF file. Thanks.

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• VB.NET - ASP.NET - MS-Access - SQL Statement

  - by Brian

  I have a button which when pressed, sets the user's rights in the db. (If Administrator UserTypeID is set to '2' and if Customer it is set to '1'). However when I run the below code, everything remains the same. I think it's from the SQL statement but I;m not sure. Can anyone help please? Protected Sub btnSetUser_Click(sender As Object, e As System.EventArgs) Handles btnSetUser.Click Dim conn As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\Brian\Documents\Visual Studio 2010\WebSites\WebSite3\db.mdb;") Dim cmd As OleDbCommand = New OleDbCommand("UPDATE [User] SET [UserTypeID] WHERE Username=?", conn) conn.Open() cmd.Parameters.AddWithValue("@Username", txtUser.Text) If ddUserType.SelectedItem.Text = "Administrator" Then cmd.Parameters.AddWithValue("@UserTypeID", "2") cmd.ExecuteNonQuery() lblSetUser.Text = txtUser.Text + "was set to Administrator." ElseIf ddUserType.SelectedItem.Text = "Customer" Then cmd.Parameters.AddWithValue("@UserTypeID", "1") cmd.ExecuteNonQuery() lblSetUser.Text = txtUser.Text + "was set to Customer." End If conn.Close() End Sub End Class

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• Is it a good idea to create an STL iterator which is noncopyable?

  - by BillyONeal

  Most of the time, STL iterators are CopyConstructable, because several STL algorithms require this to improve performance, such as std::sort. However, I've been working on a pet project to wrap the FindXFile API (previously asked about), but the problem is it's impossible to implement a copyable iterator around this API. A find handle cannot be duplicated by any means -- DuplicateHandle specifically forbids passing handles to it. And if you just maintain a reference count to the find handle, then a single increment by any copy results in an increment of all copies -- clearly that is not what a copy constructed iterator is supposed to do. Since I can't satisfy the traditional copy constructible requirement for iterators here, is it even worth trying to create an "STL style" iterator? On one hand, creating some other enumeration method is going to not fall into normal STL conventions, but on the other, following STL conventions are going to confuse users of this iterator if they try to CopyConstruct it later. Which is the lesser of two evils?

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• Full text searching in SQL Server 2008 Express Advanced

  - by Iain Macleod

  Hi, I have recently installed SQL Server 2008 Express Edition with Advanced Services on XP Pro but am having trouble getting full text searching to work with an restored database. The database was originally created in SQL Server 2005. When I call a stored proc that uses the full text index then I get the following error: Full-Text Search is not installed, or a full-text component cannot be loaded. This is my db version: Microsoft SQL Server 2008 (RTM) - 10.0.1600.22 (Intel X86) Jul 9 2008 14:43:34 Copyright (c) 1988-2008 Microsoft Corporation Express Edition with Advanced Services on Windows NT 5.1 (Build 2600: Service Pack 3) When I run: SELECT DATABASEPROPERTY('DBNAME','ISFULLTEXTENABLED') I get: 1 Also, when I look in the advanced properties for the db server in Management Studio I see both the "Default Full-Text Language" and "Full-Text Upgrade Option" properties. However, when I go to SQL Server Configuration Manager I don't see the "MSSQLFDLauncher" service. Does anyone know how to get this working? Cheers, Iain

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• What would you recommend for a large-scale Java data grid technology: Terracotta, GigaSpaces, Cohere

  - by cliff.meyers

  I've been reading up on so-called "data grid" solutions for the Java platform including Terracotta, GigaSpaces and Coherence. I was wondering if anyone has real-world experience working any of these tools and could share their experience. I'm also really curious to know what scale of deployment people have worked with: are we talking 2-4 node clusters or have you worked with anything significantly larger than that? I'm attracted to Terracotta because of its "drop in" support for Hibernate and Spring, both of which we use heavily. I also like the idea of how it decorates bytecode based on configuration and doesn't require you to program against a "grid API." I'm not aware of any advantages to tools which use the approach of an explicit API but would love to hear about them if they do in fact exist. :) I've also spent time reading about memcached but am more interested in hearing feedback on these three specific solutions. I would be curious to hear how they measure up against memcached in the event someone has used both.

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• Complex Javascript objects to JSON Objects

  - by cooldude

  Hi, Is there is any Javascript API that converts complex Javascript Objects To JSON Objects???

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• GAE images.resize with fixed proportional crop

  - by user288541

  I need to resize and crop to exactly 60x80px from various size and aspect ratio. Just before i put into Datastore. Anyone already got this issue resolved. Currently i already succed to just transform it to exact height (80px) with various width which nott look so good when i try to display it on a list. e.g jcaroussel. My db.put code is like bellow: if users.get_current_user(): personal.personal_id = int(self.request.get('personal_id')) personal.name = self.request.get('name') personal.latitude = self.request.get('latitude') personal.info = self.request.get('info') photo = images.resize(self.request.get('img'), 0, 80) personal.photo = db.Blob(photo) personal.lc_id = int(self.request.get('lc_id')) personal.put() self.redirect('/admin/personal') else: self.response.out.write('I\'m sorry, you don\'t have permission to add this LP Personal Data.') I just want to do similar result when we upload our avatar on google talk/google chat. Anyone solved this? Thx

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• How do I limit the permissions of a C# program to read only on an SQLServer Database?

  - by gav

  Hi Guys, I have written some C# which connects to a live production database. I want to give my application read only access to the DB but am unsure how to achieve this. Is there any trivial way to get this done by amending the connection string? My understanding is that the application will logon with the credentials of the person running the application and hence may or may not have write access to the db based on that fact. Can I statically limit the permissions of the application so that if someone changes the program to do something devastating at a later date any manipulation will fail? Apologies for how trivial the question may be but it's my first venture into the world of MS programming. Thanks, Gav

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• How to count occurrence of an element in a List

  - by MM

  I have an ArrayList a collection class of java as follows. ArrayList<String>animals = new ArrayList<String>(); animals.add("bat"); animals.add("owl"); animals.add("bat"); animals.add("bat"); As you can see the animals ArrayList consists of 3 bat elements and one owl element. I was wondering if there is any API in collection framework that returns the number of bat occurrences or is there a way to determine number of occurrences. I found that google's collection multiset does have an api that returns total number of occurrences of an element. But that is compatible only with jdk1.5. Our product is currently in jdk 1.6. Hence cannot use it.

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• Populating a Dropdown list in PHP dynamically

  - by mouthpiec

  Hi, I have a small PHP page which contains two drop down lists I need to populate the second one according to the result selected in the first drop down list .... is this possible? In other words I need to use the value selected from the first drop down list and use it in the dB query used to populate the second drop down list (but this should be populated upon selection of the first drop down list. If this is possible any hints please? (you can assume that I am able to populate the first drop down list from the dB) thanks

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• Fill a rails form with a hashmap

  - by Ignace

  Hey, I have a difficult situation. I let the the user create a form through a Rich Text Editor and then I save this. So for example, I save this literally into my DB: http://pastebin.com/DNdeetJp (how can you post HTML here? It gets interpreted, so now I use pastebin...) On another page I wrap this in a form_tag and it gets presented as it should be. What I want to do is save this as a template and save the answers as a hashmap to my DB. This works well, but the problem is I want to recreate what checkbox/radiobutton/... is selected when the user goes back to the page. So I want to fill the form with the answers from the hashmap. Is there a way to use a 'dummy' model or something else to accomplish this? Thanks!

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• Communication between Page and User Controls

  - by Narmatha Balasundaram

  I have a main page that has multiple user controls on it. All the user controls have static text and some data to be retrieved from the DB. The aysnchronous DB call is clubbed at the page level and one call is made to avoid multiple calls (in the different user controls) to get the same data. I want the page and user controls to load initially with the static text and later refresh the contents obtained from the server. To sum it all up, Page Loads = Asyn calls fired on page load = Data received back from the server (XML/text/whatever) = User controls to load with this data using AJAX. What methods do I have to let the user controls know that I have the data from the server and they need to update with this data?

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