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• Setting parameters after obtaining their values in stored procedures

  - by user1260028

  Right now I have an upload field while uploads files to the server. The prefix is saved so that it can later be obtained for retrieval. For this I need to attach the ID of the form to the prefix. I would like to be able to do this as such: @filePrefix = SCOPE_IDENTITY() + @filePrefix; However I am not so sure this would work because the record has not been created yet. If anything I could call an update function which obtains the ID and then injects it into the row after it has been created. To speed things up, I don't want to do this on the server but rather do this on the database. Regardless of what the approach is, I would still like to know if something like the above is possible (at least for future reference?) So if we replace that with @filePrefix = 5 + @filePrefix; would that be possible? SQL doesn't seem to like the current syntax very much...

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• HTML reuse, create template

  - by nanonerd

  After about a year doing Asp.net web forms, I stepped out (for the most part) from the .net world. I'm now working on a webapp that uses a lot of client side scripting and uses WebAPI for data access. I have a HTML section that allows note taking. I would like to make this HTML section into a template that I can reuse elsewhere on the site (e.g., insert this piece of HTML code into another web page). I'm a bit befuddled on how to go about this. Think of my problem as trying to create a "user control" in asp.net web forms ... only that I am not using web forms. Just good old fashioned HTML, CSS, Javascript, jquery, and knockout. Conceptually, I'd think that others have been in the same spot as myself. Can anyone elaborate a solution or at least provide some pointers? Thanks !

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• Boost ASIO read X bytes synchroniously into a vector

  - by xeross

  Hey, I've been attempting to write a client/server app with boost now, so far it sends and receives but I can't seem to just read X bytes into a vector. If I use the following code vector<uint8_t> buf; for (;;) { buf.resize(4); boost::system::error_code error; size_t len = socket.read_some(boost::asio::buffer(buf), error); if (error == boost::asio::error::eof) break; // Connection closed cleanly by peer. else if (error) throw boost::system::system_error(error); // Some other error. } And the packet is bigger then 4 bytes then it seems it keeps writing into those 4 bytes until the entire packet has been received, however I want it to fetch 4 bytes, then allow me to parse them, and then get the rest of the packet. Can anyone provide me with a working example, or at least a pointer on how to make it work properly ? Regards, Xeross

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• File/module structure in Python

  - by keithjgrant

  So I'm just getting started with Python, and currently working my way through diveintopython.org. The code examples are nice, but the vast majority of them are little four-line snippets, and I want to see a little more of the big picture. As I understand it--and correct me if I'm wrong--each '.py' file becomes a "module", and a group of modules in a directory becomes a "package" (at least, it does if I create a __init__.py file in that directory). What is it if I don't have a __init__.py file? So what does each "module" file look like? Do I generally define only one class in the file? Does anything else go in that file besides the class definition and maybe a handful of import commands?

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• Are spinlocks a good choice for a memory allocator?

  - by dsimcha

  I've suggested to the maintainers of the D programming language runtime a few times that the memory allocator/garbage collector should use spinlocks instead of regular OS critical sections. This hasn't really caught on. Here are the reasons I think spinlocks would be better: At least in synthetic benchmarks that I did, it's several times faster than OS critical sections when there's contention for the memory allocator/GC lock. Edit: Empirically, using spinlocks didn't even have measurable overhead in a single-core environment, probably because locks need to be held for such a short period of time in a memory allocator. Memory allocations and similar operations usually take a small fraction of a timeslice, and even a small fraction of the time a context switch takes, making it silly to context switch in the case of contention. A garbage collection in the implementation in question stops the world anyhow. There won't be any spinning during a collection. Are there any good reasons not to use spinlocks in a memory allocator/garbage collector implementation?

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• How to make a custom template in WordPress work as a password protected page?

  - by KaOSoFt

  I'm building a page with a custom template. The thing is, I need this page to be password protected, or at least accessible to logged in users, but even if I set it as such (Private/Password protected) in the New Pages section in WordPress Administration, it won't display the menu entry nor the content (if Private) or it would show the page contents immediately (if Password protected). I've read somewhere that the_content() function is what makes this work, but as you can guess, my custom template doesn't use the_content() at all, and it's all based on custom content. Do you happen to know how can I (re)implement these two options?

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• Intent flags to Login page redirect, killing previous Activities

  - by Christopher Francisco

  Basically I have a Service that at some points it will sync with the network in order to check if the token is still valid. if it isn't, it should redirect to the login screen (from the service) and if the user press the back button, it should NOT show the previous Activity but instead exit the app. I'm not asking how to hack onBackPressed, I already know how to do it. I'm asking how to accomplish this using the intent flags. So far I have tried the following: intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK); Using the FLAG_ACTIVITY_NEW_TASK is mandatory because I'm calling startActivity() from a service (or at least thrown exception told me so), and using FLAG_ACTIVITY_CLEAR_TOP cause it was supposed to remove all previous activities from the stack, leaving only the new one. The issue is if I press back, I am still able to go to the previous Activity, which makes me think the combination of both flags are clearing the activities in the NEW task, not in the previous one I might be wrong on the reason, but it doesn't work. Any help will be appreciated, thanks

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• Is the situation with Java ME improving?

  - by mike g

  It seems to be the consensus that developing for Java ME is not as cross platform as you might expect, particularly compared to say java SE, but it is difficult to assess how the situation is evolving. Is the situation improving significantly? Are problematic implementations being patched? Are problematic implementations dying out as a proportion of mobile devices? Is the tool chain improving? Are there ways to identify at least some cross platform 'errors' without necessarily deploying to each and every device?

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• A non-blocking server with java.io

  - by Jon

  Everybody knows that java IO is blocking, and java NIO is non-blocking. In IO you will have to use the thread per client pattern, in NIO you can use one thread for all clients. Now my question follows: is it possible to make a non-blocking design using only the Java IO api. (not NIO) I was thinking about a pattern like this (obviously very simplified); List<Socket> li; for (Socket s : li) { InputStream in = s.getInputStream(); byte[] data = in.available(); in.read(data); // processData(data); (decoding packets, encoding outgoing packets } Also note that the client will always be ready for reading data. What are your opinions on this? Will this be suitable for a server that should at least hold a few hundred of clients without major performance issues?

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• How to sign an APK with more than one certificate?

  - by ddcruver

  How do I sign an APK with more than one certificate, so that I can do this when I publish to the Android Market: Version 1.0 = Signed with Certificate A Version 2.0 = Signed with Certificate A & B Version 3.0 = Signed with Certificate B The Android Market does give me some hope but I am not sure what to make of it, when I upload with a different sign certificate it gives me this message: "The apk must be signed with at least one certificate in common with the previous version." Motive: I have published an app on the market using the Android Signing Tool as part of MotoDev Studio for android. The problem is that it handles the keys itself and there is no way (documented) to get them. I want to change it to use a keystore and certificate that I have more control of and can use even if I don't use MotoDev Studio anymore. Also it seems that MotoDev Studio will lock you out of new features such as shared libraries.

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• Using user editable image URL in application. Security issues.

  - by sharas

  Hi there. I am writing an application where users are required to show their photo, however as my server resources are very limited I can not let them upload it to the server. So I have three major questions: 1. How to properly validate photo URL? At least I can validate with regexp, however I need to check for file ending: `validates_format_of :photo_url, :with => URI::regexp(%w(http https))` 2. Security issues? XSS? Even I validate the picture at the moment of creation, hacker can replace image with malicious stuff anytime. 3. Maybe there are free asset stores with API?

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• get foreign key objects in a single query - Django

  - by John

  Hi I have 2 models in my django code: class ModelA(models.Model): name = models.CharField(max_length=255) description = models.CharField(max_length=255) created_by = models.ForeignKey(User) class ModelB(models.Model): category = models.CharField(max_length=255) modela_link = models.ForeignKey(ModelA, 'modelb_link') functions = models.CharField(max_length=255) created_by = models.ForeignKey(User) Say ModelA has 100 records, all of which may or may not have links to ModelB Now say I want to get a list of every ModelA record along with the data from ModelB I would do: list_a = ModelA.objects.all() Then to get the data for ModelB I would have to do for i in list_a: i.additional_data = i.modelb_link.all() However this runs a query on every instance of i. Thus making 101 queries to run. Is there any way of running this all in just 1 query. Or at least less than the 101 queries. I've tried putting in ModelA.objects.select_related().all() but this didn't seem to have any effect. Thanks

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• Reading a series of input / output in Python

  - by PulpFiction

  Hello everyone. For my app, I need to print out a series of outputs and then accepts inputs from the user. What would be the best way of doing this? Like: print '1' x = raw_input() print '2' y = raw_input() Something like this, but it would go on for at least 10 times. My only concern with doing the above is that it would make up for poor code readability. How should I do it? Should I create a function like this: def printOut(string): print string Or is there a better way?

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• how to implement inheritance in hibernate ??

  - by user359057

  Hi guys i am working in a web application. I have a entities as BaseEntity --Which contains user login info like createdBy,createdTime,EditedBy,editedTime Employee -- which contains employee information like name,address,etc... RegularEmployee --which contains salary ,bonus tht kind of fields and ContactEmployee -- which contains HourlyRate,contactPeriod etc.... My inheritance structure is BaseEntity <--- Employee <---- RegularEmployee (i.e. Employee extends BaseEntity and RegularEmployee extends Employee ContractEmployee also extend Employee Class ). How to design database structure in this case considering all the tables have id and version fields (all tables should at least have these two fields).

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• How to improve the speed of a loop containing a sqlalchemy query statement as conditional

  - by LtPinback

  This loop checks if a record is in the sqlite database and builds a list of dictionaries for those records that are missing and then executes a multiple insert statement with the list. This works but it is very slow (at least i think it is slow) as it takes 5 minutes to loop over 3500 queries. I am a complete newbie in python, sqlite and sqlalchemy so I wonder if there is a faster way of doing this. list_dict = [] session = Session() for data in data_list: if session.query(Class_object).filter(Class_object.column_name_01 == data[2]).filter(Class_object.column_name_00 == an_id).count() == 0: list_dict.append({'column_name_00':a_id, 'column_name_01':data[2]}) conn = engine.connect() conn.execute(prices.insert(),list_dict) conn.close() session.close() edit: I moved session = Session() outside the loop. Did not make a difference.

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• How to set the session timeout in Zend Framework 2

  - by user2261761

  I don't have much Zend experience and want to change someone's login code in Zend to make the session not expire. It seems the code is basic behavior: $adapter = $this->getAuthService()->getAdapter(); $adapter->setIdentity($email)->setCredential($password); $result = $this->getAuthService()->authenticate(); What do I have to do to make the session not expire or to at least set the session for a specific time? Right now the user doesn't stay logged in for long, I think perhaps it is just relying on default php settings behavior like the standard 24 minutes for the gc_maxlifetime. What is the connection between Zend_Session and AuthService?

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• Notepad++ regular expression find and replace $_REQUEST with $_GET but a more secure

  - by David

  What I am doing is replacing, in a large program, all $_REQUEST['var'] and mysql_escape_string($_REQUEST['var']) with either the 1st or 2nd line below the dotted line. Now, I have figured out this much of the regular expression but I would like to make it simpler. Instead of having to run the top one first then the 2nd one I would like to just run one all together. I tried this but it did not work. (mysql_escape_string\()*$_REQUEST\[\'([^']*)\'\]\)(\)*) So below is what works but again have to do it twice. $_REQUEST\[\'([^']*)\'\] mysql_escape_string\($_REQUEST\[\'([^']*)\'\]\) (isset($_GET['\1'])?mysql_real_escape_string($_GET['\1']):false) (isset($_POST['\1'])?mysql_real_escape_string($_POST['\1']):false) ============================ Update: Yeah, after some research I figured out that Notepad++ does not support most regular expressions. I guess one additional step can not hurt a person. It's just laziness. *NOTE: BUT if anyone wants to try feel free to comment. At least it is just 2 steps and not 20.

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• Where are good examples of Web applications built for skilled and intense use?

  - by ProfK

  I have spent most of my development career writing backend code, or front-end apps for used as daily business tools, by at least semi-skilled staff, e.g. order-tracking, sales capture, etc. That those I helped build peformed their tasks well is comfort enough, but I am still seeking excellence in the building of these kind of apps, versus the more trendy emphasis on slow and sensual interpersonal relationships with the UI. Can anyone recommend reading on this type of application (LOB?) on the web today? Any available examples to study?

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• Where should I set the DataContext - code behind or xaml?

  - by dovholuk

  (honestly I searched and read all the 'related questions' that seemed relevant - i do hope i didn't "miss" this question from elsewhere but here goes...) There are two different ways (at least) to set the DataContext. One can use XAML or one can use the code behind. What is the 'best practice' and why? I tend to favor setting it in XAML because it allows a designer to define collections on their own but I need 'ammunition' on why it's a best practice or why I'm crazy and the code behind is the bomb...

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• Should we develop code on a local machine in a VLAN?

  - by red tiger

  Because of security reasons, we will not be able to use IIS on our local machines. I'm sure that many of you have faced the same problem, so how did you solve it? Here are the options that we're looking at: Create a VLAN that is isolated from the network for development. This will allow us to use any software, including IIS, that we want. A disadvantage is testing Web services with external organizations, which can be overcome by using stubs. Not use a VLAN and use only the ASP.NET Development Server that comes with Visual Studio, and then deploying that code to the development server. This has the disadvantage of not being able to replicate the production environment during local development. In addition, at least one developer needs IIS for GIS development, so he couldn't develop locally. Thank you for comments or suggestions that you may have!

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• Manipulating Directory Paths in Python

  - by G Ullman

  Basically I've got this current url and this other key that I want to merge into a new url, but there are three different cases. Suppose the current url is localhost:32401/A/B/foo if key is bar then I want to return localhost:32401/A/B/bar if key starts with a slash and is /A/bar then I want to return localhost:32401/A/bar finally if key is its own independent url then I just want to return that key = htt p://foo.com/bar - http://foo.com/bar I assume there is a way to do at least the first two cases without manipulating the strings manually, but nothing jumped out at me immediately in the os.path module.

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• Using Java, can I have one JVM spawn another, and then have the original one exit?

  - by CarlG

  I have a need to have a running JVM start another JVM and then exit. I'm currently trying to do this via Runtime.getRuntime().exec(). The other JVM starts, but my original JVM won't exit until the "child" JVM process stops. It appears that using Runtime.getRuntime().exec() creates a parent-child relationship between the processes. Is there some way to de-couple the spawned process so that the parent can die, or some other mechanism to spawn a process without any relationship to the creating process? Note that this seems exactly like this question: http://stackoverflow.com/questions/2566502/using-java-to-spawn-a-process-and-keep-it-running-after-parent-quits but the accepted answer there doesn't actually work, at least not on my system (Windows 7, Java 5 and 6). It seems that maybe this is a platform-dependent behavior. I'm looking for a platform independent way to reliably invoke the other process and let my original process die.

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• MS DOS function like ipconfig to get system performance specs?

  - by JustADude

  I am aware of MSINFO32, but I'm wondering if there is a MS DOS command similar to ipconfig in order to get system specifications? I would like for the system specifications to be displayed in the MS DOS prompt. I would like to see at least: CPU RAM BUS speed Thanks for any insights. Edit: I am unable to install any other software, so just have to use existing DOS programming commands to extract this information. Thank you again. 2nd Edit: Whoops. Using Windows XP and Windows Vista.

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• Force freeing memory in PHP

  - by DBa

  Hi everybody, in a PHP program, I sequentially read a bunch of files (with file_get_contents), gzdecode them, json_decode the result, analyze the contents, throw the most of it away, and store about 1% in an array. Unfortunately, with each iteration (I traverse over an array containing the filenames), there seems to be some memory lost (according to memory_get_peak_usage, about 2-10 MB each time). I have double- and triplechecked my code, I am not storing unneded data in the loop (and the needed data hardly exceeds about 10MB overall), but I am frequently rewriting (actually, strings in an array). Apparently, PHP does not free the memory correctly, thus using more and more RAM until it hits the limit. Is there any way to do a forced garbage collection? Or, at least, to find out where the memory is used? Thanks in advance, Dmitri

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• Most optimal way to detect if black (or any color pixels) exist in an image file?

  - by Zando

  What's the best and most flexible algorithm to detect any black (or colored pixel) in a given image file? Say I'm given an image file that could, say, have a blue background. And any non blue pixel, including a white pixel, is counted as a "mark". The function returns true if there are X number of pixels that deviate from each other at a certain threshold. I thought it'd be fastest to just simply iterate through every pixel and see if its color matches the last. But if it's the case that pixel (0,0) is deviant, and every other pixel is the same color (and I want to allow at least a couple deviated pixels before considering an image to be "marked), this won't work or be terribly efficient.

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