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• Modal View Controller Undesirably Hides Tab Bar

  - by Kevin Sylvestre

  I am working on an application that requires user authentication to access a profile. The profile section is located solely under one tab (and all others tabs do not require authentication). I currently present a authentication view controller modally (and then dismiss on success) when the user selects the profile tab. However, this approach prevents the user from deciding not to register / login (that is, all tabs are hidden once the authentication screen is presented modally). I don't want the user to be able to dismiss the modal view controller, but rather have it modal only for the profile tab. Is this possible? Can I have tabs visible while having a modal view controller? What is the best approach here. Thanks.

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• How to Debug XAML Parsing Errors in Silverlight?

  - by Nick Gotch

  I run into the following issue semi-regularly: I make changes to XAML or some resources used by it and when I go to load up the Silverlight project in debug mode it only gets as far as the spinning Silverlight-loading animation. I've tried attaching the VS08 debugger to the process but it doesn't do anything at this point (works fine once I'm in the Silverlight but not before.) From previous experience I've noticed this happens when there're problems with the XAML or the resources in it but my only solution so far has been to dissect the code line-by-line until I spot the problem. Is there an easy way to debug/diagnose these situations? UPDATE I found this question with some help, but it still doesn't provide a good way to debug these types of issues.

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• Flex/Air : Text Area with Line Number Filtering

  - by Ajay

  I need to have a Text Area With Line Numbers, & once the Text File is Imported to the Text Area.. the user must be able to select the line numbers & see the filtered output. I have implemented the same with Numeric steppers. I am in search of an enhanced component. are there better Advanced Components for Textarea ? Any Advanced Textarea component with built-in Search/Replace/Filter Capabilities ? Cheers, Ajay

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• How to use numpy with OpenBLAS instead of Atlas in Ubuntu?

  - by pierotiste

  I have looked for an easy way to install/compile Numpy with OpenBLAS but didn't find an easy answer. All the documentation I have seen takes too much knowledge as granted for someone like me who is not used to compile software. There are two packages in Ubuntu related to OpenBLAS : libopenblas-base and libopenblas-dev. Once they are installed, what should I do to install Numpy again with them? Thanks! Note that when these OpenBLAS packages are installed, Numpy doesn't work anymore: it can't be imported: ImportError: /usr/lib/liblapack.so.3gf: undefined symbol: ATL_chemv. This was noticed here already. Answer to the question: Run sudo update-alternatives --all and set liblapack.so.3gf to /usr/lib/lapack/liblapack.so.3gf

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• What's a good Minimal Server-Side Javascript Framework?

  - by Nick Retallack

  So I was writing a web app with web.py that uses plenty of client-side javascript, and my database is on couchdb so the queries are in javascript too, and eventually I just got to thinking, why not skip the python and go all javascript? Besides, some functions need to run once on the client and again on the server to make sure you're not spoofing, so why translate between javascript and python? So I'm looking for a simple lightweight javascript web framework. All I really need is the url routing, request and response stuff (standard wsgi?), and a way to hook into a big http server like nginx. What do you guys recommend?

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• OpenId ASP MVC Authentication with long expiry

  - by Khash

  Stackoverflow uses OpenId as many other websites. However, I rarely need to provide my OpenId to Stackoverflow while with other OpenId enabled websites, I have to do it once a day or week. This suggests to me that the expiry of the session is with the website and not the OpenId provider. Looking at the DotNetOpenId code in ASP MVC, I can see that after a successful authentication by the OpenId provider FormsAuthentication.SetAuthCookie is called with the identifier and a boolean parameter to determine if the cookie should be persisted. How can I force this cookie to expire, say in 2020 instead of whatever the default value is.

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• SO_LINGER and closing sockets(WINSOCK)

  - by Johnny Walked

  hey. im writing a multithreaded winsock application and im having some issues with closing the sockets. first of all, is there a limit for a number of simultaneously open sockets? lets say like 32 sockets all in once. i establish a connection on one of the sockets, and passing information and it all goes right. problem is when i disconnect the socket and then reconnect to the same destination, i get a RST from the server after my SYN. i dont have the code for the server app so i cant debug it. when i used SO_LINGER and it sent a RST flag at the end of each session - it worked. but i dont want to end my connections this way. when not using SO_LINGER a FIN flag was sent but it seems the connection was not really closed. any help? thanks

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• C# GridView dynamically built columns with textboxes ontextchanged

  - by tnriverfish

  My page is a bulk order form that has many products and various size options. I've got a gridview that has a 3 static columns with labels. There are then some dynamically built columns. Each of the dynamically built columns have a textbox in them. The textbox is for quantity. Trying to either update the server with the quantity entered each time a textbox is changed (possibly ontextchanged event) or loop though each of the rows column by column and gather all the items that have a quantity and process those items and their quantities all at once (via button onclick). If I put the process that builds the GridView behind a if(!Page.IsPostBack) then the when a textchanged event fires the gridview only gets the static fields and the dynamic ones are gone. If I remove the if(!Page.IsPostBack) the process to gather and build the page is too heavy on processing and takes too long to render the page again. Some advice would be appreciated. Thanks

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• Unique identifier for an email

  - by Skywalker

  I am writing a C# application which allows users to store emails in a MS SQL Server database. Many times, multiple users will be copied on an email from a customer. If they all try to add the same email to the database, I want to make sure that the email is only added once. MD5 springs to mind as a way to do this. I don't need to worry about malicious tampering, only to make sure that the same email will map to the same hash and that no two emails with different content will map to the same hash. My question really boils down to how one would combine multiple fields into one MD5 (or other) hash value. Some of these fields will have a single value per email (e.g. subject, body, sender email address) while others will have multiple values (varying numbers of attachments, recipients). I want to develop a way of uniquely identifying an email that will be platform and language independent (not based on serialization). Any advice?

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• MongoDB, Carrierwave, GridFS and prevention of files' duplication

  - by Arkan

  I am dealing with Mongoid, carrierwave and gridFS to store my uploads. For example, I have a model Article, containing a file upload(a picture). class Article include Mongoid::Document field :title, :type => String field :content, :type => String mount_uploader :asset, AssetUploader end But I would like to only store the file once, in the case where I'll upload many times the same file for differents articles. I saw GridFS has a MD5 checksum. What would be the best way to prevent duplication of identicals files ? Thanks

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• Style: Dot notation vs. message notation in Objective-C 2.0

  - by groundhog

  In Objective-C 2.0 we got the "dot" notation for properties. I've seen various back and forths about the merits of dot notation vs. message notation. To keep the responses untainted I'm not going to respond either way in the question. What is your thought about dot notation vs. message notation for property accessing? Please try to keep it focused on Objective-C - my one bias I'll put forth is that Objective-C is Objective-C, so your preference that it be like Java or JavaScript aren't valid. Valid commentary is to do with technical issues (operation ordering, cast precedence, performance, etc), clarity (structure vs. object nature, both pro and con!), succinctness, etc. Note, I'm of the school of rigorous quality and readability in code having worked on huge projects where code convention and quality is paramount (the write once read a thousand times paradigm).

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• FLEX: Make LineChart DATATIP constrain to vertical axis.

  - by user60310

  When making a line chart, Lets say its for business sales for different depts and horizontally is days and vertically is dollars. When you hover over a line it tells a dataTip tells you the sales for that dept. on that day. I want it to show all the depts at the same time, so say you hover over day 3, I want the dataTips for all depts on day 3 to display so you can compare the values for all the sales on the same day. I set the mouseSensitivity for the dataTips to display all the lines at once but I end up getting day 2 for one dept and day 3 for another which is not wanted. This is actually posted as a bug and explained better here: http://bugs.adobe.com/jira/browse/FLEXDMV-1853 I am wondering if anyone can come up with a work-around for this? Thanks!

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• Using LINQ Group By to return new XElements

  - by Jon

  I have the following code and got myself confused: I have a query that returns a set of records that have been identified as duplicates and I then want to create a XElement for each one. This should be done in one query I think but I'm now lost. var f = (from x in MyDocument.Descendants("RECORD") where itemsThatWasDuplicated.Contains((int)x.Element("DOCUMENTID")) group x by x.Element("DOCUMENTID").Value into g let item = g.Skip(1) //Ignore first as that is the valid one select item ); var errorQuery = (from x in f let sequenceNumber = x.Element("DOCUMENTID").Value let detail = "Sequence number " + sequenceNumber + " was read more than once" select new XElement("ERROR", new XElement("DATETIME", time), new XElement("DETAIL", detail), new XAttribute("TYPE", "DUP"), new XElement("ID", x.Element("ID").Value) ) );

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• jQuery closing pop-up after successful form submit

  - by RyanP13

  Hi, I have a pop up form that i wish to close on successfull submit of the form. Currently we are only validating on the server side which will create an unordered list of validation errors with the class .error_message. Once the form has been successfully submitted i want to close the window. Currently the jQuery i am using for this is as follows but does not work because the first time the form has been submitted the number of error messages will always be zero. $(document).ready(function() { $('form#emailQuote').submit(function() { var $emailErrors = $('form#emailQuote ul.error_message').length; alert($emailErrors); if ($emailErrors == 0) { //window.close(); alert('no errors'); } else { //alert('errors'); alert('errors'); } }); });

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• $.Post with Form submit

  - by Michael

  ...Some form gets submitted... $.("form").submit(function() { saveFormValues($(this), "./../.."; } function saveFormValues(form, path) { var inputs = getFormData(form); var params = createAction("saveFormData", inputs); var url = path + "/scripts/sessions.php"; $.post(url, params); } The weird thing is that if i add a function to the $.post(url, params, function(data) { alert(data); } I get a blank alert statement. Within scripts/sessions.php i have a function to save whatever the $_POST information is to a file, and the sessions.php never saves this saveFormValues call. It never shows up to the file. But if i keep trying to get it to save, about once every 15 will actually allow it to be saved. This leads me to believe that the forms POST is somehow blocking this value saving post. Any help?

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• Tricks to avoid losing motivation?

  - by AareP

  Motivation is a tricky thing to upkeep. Once I thought that ambitious projects will keep programmer motivated, and too simple tasks will hinder his motivation. Now I have plenty of experience with small and large projects, desktop/web/database programming, c++/c#/java/php languages, oop/non-oop paradigms, day-job/free-time programming.. but I still can't answer the question of motivation. Which programming tasks I like, and which don't? It seems to depend on too many variables. One thing remains constant though. It's that starting everything from scratch is always more motivating than extending some existing system. Unfortunately it's hard to use this trick in productive programming. :) So my question is, what tricks programmer can use to stay motivated? For example should we use pen and paper as much as possible, in order not to get fed up with monitor and keyboard?

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• Sitemaps on multiple front end servers using a http handler, is that a good idea?

  - by Rihan Meij

  Question 1 We would like to generate a site map for our CMS site We have multiple front end servers with approx a million articles. Environment multiple MS SQL servers multiple front end servers (load balanced) ASP.net - and IIS 6 Windows 2003 To have the site maps (the site map index file, and the site map files) physically on the front end servers will be a operations nightmare and error prone. So we are considering using http handlers instead so that it does not matter what server gets the request, it will be able to serve the correct xml file. Question 2 If we ping Google each time we publish a new article will that effect us negatively if that happens more than once a hour. Thanks!

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• Background processing in rails

  - by hashpipe

  Hi, This might seem like a FAQ on stackoverflow, but my requirements are a little different. While I have previously used BackgroundRB and DJ for running background processes in ruby, my requirement this time is to run some heavy analytics and mathematical computations on a huge set of data, and I need to do this only about the first 15 days of the month. Going by this, I am tempted to use cron and run a ruby script to accomplish this goal. What I would like to know / understand is: 1 - Is using cron a good idea (cause I'm not a system admin, and so while I have basic idea of cron, I'm not overly confident of doing it perfectly) 2 - Can we somehow modify DJ to run only on the first 15 days of the month (with / without using cron), and then just stop and exit once all the jobs in the queue for the day are over (don't want it to ping the DB every time for a new job...whatever the jobs will be in the queue when DJ starts, that will be all). I'm not sure if I have put the question in the right manner, but any help in this direction will be much appreciated. Thanks

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• How to organize a large number of objects

  - by shane

  We have a large number of documents and metadata (xml files) associated with these documents. What is the best way to organize them? Currently we put them into a series of nested folders: /repository/category/date(when they were loaded into our db)/document_number.pdf and .xml We use the path as a unique identifier for the document in our system. This is more versatile than putting them all in a single flat folder. also it is independent from our database/application, so we can reload them in case of failure. Yet, it introduces some limitations. for example we can't move the files once they've been placed in this structure, also it takes work to put them this way. What is the best practice? How websites such as Scribd deal with this problem?

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• Transitioning to Branching with TFS

  - by Rob

  Our team is currently using plain old TFS 2005, no branching, shared checkouts etc... I would like to introduce a DEV/MAIN/PROD branching system simillar to the basic flavor in the TFS Guidance document so that we can do some parallel dev, isolation, and firm up review and deployment processes. I have read most of the whitepapers etc. Do you guys have any practical advice, suggested tools, gotchas or reccomendations. Also, we plan to migrate to 2010 once it comes out - not sure if that would affect anything. I appreciate all the suggestions and help I can get as I am a branching neophyte. Thanks in advance.

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• What useful GDB scripts have you used/written?

  - by nik

  People use gdb on and off for debugging, of course there are lots of other debugging tools across the varied OSes, with and without GUI and, maybe other fancy IDE features. I would like to know what useful gdb scripts you have written and liked. While, I do not mean a dump of commands in a something.gdb file that you source to pull out a bunch of data, if that made your day, go ahead and talk about it. Lets think conditional processing, control loops and functions written for more elegant and refined programming to debug and, maybe even for whitebox testing Things get interesting when you start debugging remote systems (say, over a serial/ethernet interface) And, what if the target is a multi-processor (and, multithreaded) system Let me put a simple case as an example... Say, A script that traversed serially over entries to locate a bad entry in a large hash-table that is implemented on an embedded platform. That helped me debug a broken hash-table once.

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• UnitTest++ constructing fixtures multiple times?

  - by Peter

  I'm writing some unit tests in UnitTest++ and want to write a bunch of tests which share some common resources. I thought that this should work via their TEST_FIXTURE setup, but it seems to be constructing a new fixture for every test. Sample code: #include <UnitTest++.h> struct SomeFixture { SomeFixture() { // this line is hit twice } }; TEST_FIXTURE(SomeFixture, FirstTest) { } TEST_FIXTURE(SomeFixture, SecondTest) { } I feel like I must be doing something wrong; I had thought that the whole point of having the fixture was so that the setup/teardown code only happens once. Am I wrong on this? Is there something else I have to do to make it work that way?

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• Best practices for combining Lucene.NET and a relational database?

  - by FlySwat

  I'm working on a project where I will have a LOT of data, and it will be searchable by several forms that are very efficiently expressed as SQL Queries, but it also needs to be searched via natural language processing. My plan is to build an index using Lucene for this form of search. My question is that if I do this, and perform a search, Lucene will then return the ID's of matching documents in the index, I then have to lookup these entities from the relational database. This could be done in two ways (That I can think of so far): N amount of queries (Horrible) Pass all the ID's to a stored procedure at once (Perhaps as a comma delimited parameter). This has the downside of being limited to the max parameter size, and the slow performance of a UDF to split the string into a temporary table. I'm almost tempted to mirror everything into lucenes index, so that I can periodicly generate the index from the backing store, but only need to access it for the frontend. Advice?

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• Is there a jquery List plugin that will auto-sort items and has robust add/remove methods?

  - by Breadtruck

  I have been googling for hours looking for something to handle my situation. I am not skilled enough to write my own jquery plugin ..YET!! The plugin should auto-sort the list, not as important as being able to add/remove items from the list easily. Themeroller capable would be a plus. I would basically use anything as long as I could add a item to the list (or any other container for that matter), item is coming from a modal popup that is using ajax to search for the item. Once the item is found I want to click that item and have it added to the list and it would put it into the correct order based on alphabetic sort. I think where I am losing sight is the complexity of the item and needing to have the item contain: The name of the item a hidden value, [the int id of the item], one or two checkboxes for turning on/off a feature for that item. I am really open to any ideas, suggestions on a better process, or a pointer to a plugin that might get me close.

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• Is it possible to make the AntiForgeryToken value in ASP.NET MVC change after each verification?

  - by jmcd

  We've just had some Penetration Testing carried out on an application we've built using ASP.NET MVC, and one of the recommendations that came back was that the value of the AntiForgeryToken in the Form could be resubmitted multiple times and did not expire after a single use. According to the OWASP recommendations around the Synchronizer Token Pattern: "In general, developers need only generate this token once for the current session." Which is how I think the ASP.NET MVC AntiForgeryToken works. In case we have to fight the battle, is it possible to cause the AntiForgeryToken to regenerate a new value after each validation?

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