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• Android - Looking for an AOP solution

  - by Serj Lotutovici

  I'm writing an application that on the bottom line uses it's internal API for some manipulations. The problem is that to call any method provided by that class first I (or anybody who uses the API) have to call #prepare() and after that #cleanup(). It all worked fine until the application and the API started to grow. And the risk of not calling one of the supplied methods before or after the API is now to big to be ignored (which makes it a bug risky application). Searching for a solution I found this question. I use Google Guice in my app for other purposes, but Android doesn't support AOP, that's why a use only guice-no_aop-x.jar. So I end-up with two questions: Is there an AOP solution for android to implement the same approach that is shown in the link above? Or may be someone has an idea that will be suitable for my case? Thanks in advice!

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• Storing n-grams in database in < n number of tables.

  - by kurige

  If I was writing a piece of software that attempted to predict what word a user was going to type next using the two previous words the user had typed, I would create two tables. Like so: == 1-gram table == Token | NextWord | Frequency ------+----------+----------- "I" | "like" | 15 "I" | "hate" | 20 == 2-gram table == Token | NextWord | Frequency ---------+------------+----------- "I like" | "apples" | 8 "I like" | "tomatoes" | 12 "I hate" | "tomatoes" | 20 "I hate" | "apples" | 2 Following this example implimentation the user types "I" and the software, using the above database, predicts that the next word the user is going to type is "hate". If the user does type "hate" then the software will then predict that the next word the user is going to type is "tomatoes". However, this implimentation would require a table for each additional n-gram that I choose to take into account. If I decided that I wanted to take the 5 or 6 preceding words into account when predicting the next word, then I would need 5-6 tables, and an exponentially increase in space per n-gram. What would be the best way to represent this in only one or two tables, that has no upper-limit on the number of n-grams I can support?

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• Trying to understand MVC Models, Advice?

  - by Tyler

  I am writing my own MVC for the purpose of learning it. I have pretty much everything "down-pat" and my main stuff written besides models due to some trouble understanding them and lack of viable examples. Now, I've been told a model should reprecent a single row, someone told me, your model class should on update/insert and delete rows, anything that involves fetching a single or multiple rows - a "finder" class should be used. So... a) what is a finder class, b) how do I implement it in a useage example, c) Is what I've been told about models correct or is there a better way than "finders"? Advice is much appricated :)

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• Regular Expression find a phrase not inside an HTML tag

  - by James Buckingham

  Hi there, I'm struggling a bit with this regular expression and wondered if anyone was about to help me please? What I need to do is isolate the 1st phrase inside a string which is NOT inside an HTML tag. So the examples I have at the moment are: This is some test text about ITS for the ITS department. Also worth mentioning ABS as well I guess.ITS, ... and ... This is some ITS test text about ITS for the ITS department. Also worth mentioning ABS as well I guess So in the first example I want it to ignore the wrapped ITS and give me the ITS at the end of the 1st sentence. In the second example I want it to return the ITS at the start of the 2nd sentence. The aim is to replace these with my own custom wrapped acronym tags in a ColdFusion application I'm writing. Thanks a lot, James

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• How to open email by x-gm-msgid in Gmail with Javascript

  - by Rui J

  I'm writing an extension which surfaces links to gmail messages. As the UI loads right in Gmail, I should be able to click on one of these links and have Gmail load it (without refreshing). I have "x-gm-msgid" available and theoretically, I should just be able to navigate to "https://mail.google.com/mail/u/0/#inbox/[x-gm-msgid]". I've tried using location.hash = "#inbox/[x-gm-msgid]" I've tried using history.pushState(null, null, "/mail/u/0/#inbox/[x-gm-msgid]") Neither of which works. Gmail just thwarts any attempt to change the URL (unless it is done via user interaction) Any thoughts on how to get around this restriction?

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• Is there an easier way to typecast with unknown types?

  - by Adam S

  Hi all. I am writing a function to recurse my XAML and add all the controls to a hashtable, with their names being the keys. Unfortunately it seems like I have to go through and list every possible type: void Recurse_Controls(object start) { string start_type = start.GetType().ToString(); if (start_type == "StackPanel") { ControlsByName.Add(((StackPanel)start).Name, start); foreach (object item in ((StackPanel)start).Children) { Recurse_Controls(item); } } if (start_type == "Grid") { ControlsByName.Add(((Grid)start).Name, start); foreach (object item in ((Grid)start).Children) { Recurse_Controls(item); } } } Is there a simpler way of doing this?

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• IO completion port key confusion

  - by Richard Tew

  I'm writing an IO completion port based server (source code here) using the Windows DLL API in Python using the ctypes module. But this is a pretty direct usage of the API and this question is directed at those who have a knowledge of IOCP, not Python. As I understand the documentation for CreateIoCompletionPort, you specify your "user defined" completion key when you call this function with a file handle (in my case a socket) you are associating with the created IOCP. When you get around to calling GetQueuedCompletionStatus, you get a completion key value along with a pointer to an overlapped object. The completion key should identify what overlapped object and request has completed. However, let's say I pass in 100 as the completion key in my CreateIoCompletionPort call with an overlapped object. When the same overlapped object has its IO completed and it arrives back through GetQueuedCompletionStatus, the completion key that accompanies it is much larger and bares no resemblance to the original value of 100. Am I misunderstanding how the completion key works, or must I be doing it wrong in the source code I linked above?

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• Audio Detection in Matlab

  - by insane-36

  I am writing a matlab code that would be able to read the audio file and then compare it to the another audio and recognize if those audio are the voice of the same person. In both type of the audio, would have the same word utterance and the audio is about 1 minutes long. I have come to know that the approach of sliding windows using hamming window would work best on this approach but have a very little idea on this. The simple code to read an audio file and then display a portion of 10s is as below : [x,fs, nbits]= wavread('01-AudioTrack 01.wav'); subplot(211) plot(x) title('Entire Wave') smallRange = 1:100000; subplot(212) plot(smallRange,x(smallRange)) How do I make Hamming window each of 10ms in this case and what approaches should I take to deal with this problem ?

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• How should I protect against hard link attacks?

  - by Thomas

  I want to append data to a file in /tmp. If the file doesn't exist I want to create it I don't care if someone else owns the file. The data is not secret. I do not want someone to be able to race-condition this into writing somewhere else, or to another file. What is the best way to do this? Here's my thought: fd = open("/tmp/some-benchmark-data.txt", O_APPEND | O_CREAT | O_NOFOLLOW | O_WRONLY, 0644); fstat(fd, &st); if (st.st_nlink != 1) { HARD LINK ATTACK! } What's the right way? Besides not using a world-writable directory.

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• How to Display result of subquery rows as one column in MySQL?

  - by SIA

  Hi I have three tables Category, Movies and RelCatMov Category-table categoryid, categoryName 1 thriller 2 supsense 3 romantic 4 action 5 sci-fi Movies-table movieid, movieName 1 Avataar 2 Titanic 3 NinjaAssassin RelCatMov-table categoryid, MovieID 1 1 2 2 3 2 4 2 5 2 Now i Want to display a the record as MovieName Categories Titanic Suspense,Romantic,Sci-fi,action How to do this. I am writing a query select MovieName,(select categoryname from category b,relcatmov c where b.categoryid=c.categoryid and c.movieid=a.movieid) as categories from movies a; Error: Subquery returns more than one row!!! How to display the result of rows in one column? Please help!!!

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• CollectionChanged notification across threads?

  - by Mark

  I'm writing a download manager using C#/WPF, and I just encountered this error: This type of CollectionView does not support changes to its SourceCollection from a thread different from the Dispatcher thread. The basic flow of my program is that a few web pages/downloads are enqueued at the start, and then they're downloaded asynchronously. When an HTML page has completed downloading, I parse it and look for more stuff to download, then enqueue it directly from within the worker thread. I get that error when trying to send out the CollectionChanged event on my customized queue class. However, I need to fire that event so that the GUI can get updated. What are my options?

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• crunching multiple js files during development

  - by Yaron Naveh

  I'm writing a backbone.js app. I have multiple js, css and html template files. I also have a script to crunch them into a single file so it is faster to download. How should I work during development: Add a listener to the file system and after every change compile the files so I can see it in a browser. This implies a 1-2 seconds overhead before I can see what I did, which is annoying for html fine-tuning. Somehow browse using the multiple files during development and only crunch before going to production. This means I need to have a separate index.html for dev and prod. What's your take?

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• How do I manually log a user in with a MembershipProvider?

  - by Allen

  I'm experimenting with writing my own custom MembershipProvider in asp.net and I want to roll my own login page. We do some fairly special stuff at login time so we can't use the default login control so I need a way to manually log a user in. So far I haven't found anything on how to write your own login control so I'm here, wondering how I can manually log a user in via a MembershipProvider. I've tried Membership.ValidateUser("user", "pass"); and while that does call ValidateUser() on my custom MembershipProvider, and it does return true, it doesn't actually log me in. Btw I'm fairly new to the whole MembershipProvider stuff so if I'm not even on the right wavelength, feel free to let me know.

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• How can you tell the source of the data when using the Stream.BeginRead Method?

  - by xarzu

  When using the Stream.BeginRead Method, and you are reading from a stream into a memory, how is it determined where you are reading the data from? See: http://msdn.microsoft.com/en-us/library/system.io.stream.beginread.aspx In the list of parameters, I do not see one that tells where the data is being read from: Parameters buffer Type: System.Byte[] The buffer to read the data into. offset Type: System.Int32 The byte offset in buffer at which to begin writing data read from the stream. count Type: System.Int32 The maximum number of bytes to read. callback Type: System.AsyncCallback An optional asynchronous callback, to be called when the read is complete. state Type: System.Object A user-provided object that distinguishes this particular asynchronous read request from other requests.

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• Reading a client's header from Python CGI script?

  - by jawonlee

  I'm writing a very simple web service, written in Python and run as CGI on an Apache server. According to Python docs (somewhere... I forgot where), I can use sys.stdin to read the data POSTed by a random client, and this has been working fine. However, I would like to be able to read the HTTP header information as well - incoming IP, user agent, and so on. I'd also like to keep it very simple for now, by using only Python libraries (so no mod-python). How do I do this?

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• JavaScript lazy regex for matching HTML tags

  - by Grnbeagle

  Hi, I'm having a problem writing a regular expression for matching HTML tags. I found a similar entry here, but this didn't quite work in my case. Here's my test string: <div id="div0" class="myclass">here's some text that may include whitespace</div><div id="div1" class="myclass"> and some more here </div> And here's my regex based on the aforementioned entry: <div[^>]*class="myclass">[^~]*?<\/div> Note that I need to match the first instance of <div /> with class of "myclass." The content may have carriage returns. These <div> tags won't be nested. Here's a rubular page for testing: http://rubular.com/r/vlfcikKMXk

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• dropdowllist selected item from javascript to servlet

  - by kawtousse

  Hi, I am writing to ask if anybody knows, is it possible to get the value from a JavaScript variable and use this value in a Java Servlet? I have read up on this but all i have found is getting the JavaScript value through a form submit. What I need is: I have a html select combo box. I need to extract the selected value from this and use this value to query a database. Is this possible. Thanks in advance.

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• Problems with sp_addlinkedserver in MSSQL 2000

  - by manneorama

  Hi! I'm having a bit of a problem with moving specific data from one server running MSSQL 2000 (A) and another running MSSQL 2008 (B). I'm writing a script according to customer specifications which is to be executed on A, populating tables in B with data. However, I can't seem to get the server link to work. -- Bunch of declarations here EXEC sp_addlinkedserver @server = @ServerName, @srvproduct = @ServerProduct, @provider = @ProviderString, @datasrc = @RemoteHost -- Data migration stuff here EXEC sp_dropserver @ServerName Now if I run the script in its entirety I get an error saying: Msg 7202, Level 11, State 2, Line 55 Could not find server 'remoteServer' in sysservers. Execute sp_addlinkedserver to add the server to sysservers. However, if I higlight only the sp_addlinkedserver-part and execute that, there is no error and I can highlight the rest of the script and run it. What am I missing here? Please help! PS. If backup-restore was an option, I would have done that already.

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• Grails/Spring HttpServletRequest synchronization

  - by Jeff Storey

  I was writing a simple Grails app and I have a spot in a gsp where one of my java beans in modified. <g:each in="${myList}" status="i" var="myVar"> // if the user performs some view action, update one of the myVar elements </g:each> This works, but I don't think it's quite threadsafe. myList is an http request variable but in cases of pages that use ajax (or other client side manipulations), it is possible for two threads to be modifying the same request scope variable The Spring AbstractController class provides a setSynchronizeOnSession method. Does grails provide any equivalent functionality? If not, what's the best way to protect this non-threadsafe mutation? thanks, Jeff

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• Streaming audio (YouTube)

  - by wvd

  Hello all, I'm writing a CLI for a music-media-platform. One of the features is going to be that you can directly play YouTube videos from the CLI. I don't really have an idea to do it but this one sounded the most reasonable: I'm going to use of those sites where you can download music from YouTube, e.g. http://keepvid.com/ - then I directly stream & play this -- but I have one problem. Is there any Python library capable of doing this and if so, do you have any concrete examples? I've been looking but found nothing, even not with gstreamer. Thanks, William van Doorn

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• Split user.config into different files for faster saving

  - by HorstWalter

  In my c# Windows Forms application (.net 3.5 / VS 2008) I have 2 settings files resulting in one user.config file. One setting file consists of larger data, but is rarely changed. The frequently changed data are very few. However, since the saving of the settings is always writing the whole (XML) file it is always "slow". SettingsSmall.Default.Save(); // slow, even if SettingsSmall consists of little data Could I configure the settings somehow to result in two files, resulting in: SettingsSmall.Default.Save(); // should be fast SettingsBig.Default.Save(); // could be slow, is seldom saved I have seen that I can use the SecionInformation class for further customizing, however what would be the easiest approach for me? Is this possible by just changing the app.config (config.sections)?

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• How can I force input to uppercase in an asp.net textbox?

  - by Aheho

  I'm writing an asp.net application. I have a textbox on a webform and I want to force whatever the user types to upper case. I'd like to do this on the front end. You should also note that there is a validation control on this textbox, so I want to make sure the solution doesn't interfere with the asp.net validation. Clarification: It appears that the CSS text-tranform makes the user input appear in uppercase, however under the hood, it's still lower case as the validation control fails. You see, my validation control checks to see if a valid state code is entered, however the regex expression I"m using only works with uppercase characters.

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• Javascript functions return lines of function code or "{[native code]}," what am I doing wrong?

  - by DavidR

  I am writing some code to find the user selection in a contenteditable div, I'm taking my code from this quirksmode article. function findSelection(){ var userSelection; if (window.getSelection) {userSelection = window.getSelection;} else if (document.selection){userSelection = document.selection.createRange();} // For microsoft if (userSelection.text){return userSelection.text} //for Microsoft else {return userSelection} } I'm testing it in Chrome and Firefox, if I do an alert(userSelection) within the function or an alert(findSelection();) outside the function, it returns function getSelection() {[native code]}. If I do console.log(findSelection();) it gives me getSelection(). Is there something I've done wrong?

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• database vs flat file, which is a faster structure for "regex" matching with many simultaneous reque

  - by Jamex

  Hi, which structure returns faster result and/or less taxing on the host server, flat file or database (mysql)? Assume many users (100 users) are simultaneously query the file/db. Searches involve pattern matching against a static file/db. File has 50,000 unique lines (same data type). There could be many matches. There is no writing to the file/db, just read. Is it possible to have a duplicate the file/db and write a logic switch to use the backup file/db if the main file is in use? Which language is best for the type of structure? Perl for flat and PHP for db? Addition info: If I want to find all the cities have the pattern "cis" in their names. Which is better/faster, using regex or string functions? Please recommend a strategy TIA

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• database vs flat file, which is a faster structure for regex matching with many simultaneous request

  - by Jamex

  Hi, which structure returns faster result and/or less taxing on the host server, flat file or database (mysql)? Assume many users (100 users) are simultaneously query the file/db. Searches involve pattern matching using regex against a static file/db. File has 50,000 unique lines (same data type). There could be many matches. There is no writing to the file/db, just read. Is it possible to have a duplicate the file/db and write a logic switch to use the backup file/db if the main file is in use? Which language is best for the type of structure? Perl for flat and PHP for db? TIA

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