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• Escape characters during paste in vim

  - by Michael Anderson

  I copy stuff from output buffers into C++ code I'm working on in vim. Often this output gets stuck into strings. And it'd be nice to be able to escape all the control characters automatically rather than going back and hand editing the pasted fragment. As an example I might copy something like this: error in file "foo.dat" And need to put it into something like this std::string expected_error = "error in file \"foo.dat\"" I'm thinking it might be possible to apply a replace function to the body of the last paste using the start and end marks of the last paste, but I'm not sure how to make it fly.

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• How can I pass data from an aspx page to an ascx modal popup?

  - by Erick B

  I'm fairly new to ASP.NET and trying to learn how things are done. I come from a C# background so the code-behind portion is easy, but thinking like a web developer is unfamiliar. I have an aspx page that contains a grid of checkboxes. I have a button that is coded via a Button_Click event to collect a list of which rows are checked and create a session variable out of that list. The same button is referenced (via TargetControlID) by my ascx page's ModalPopupExtender which controls the panel on the ascx page. When the button is clicked, the modal popup opens but the Button_Click event is never fired, so the modal doesn't get its session data. Since the two pages are separate, I can't call the ModalPopupExtender from the aspx.cs code, I can't reach the list of checkboxes from the ascx.cs code, and I don't see a way to populate my session variable and then programmatically activate some other hidden button or control which will then open my modal popup. Any thoughts?

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• in-memory database in Python

  - by Claudiu

  I'm doing some queries in Python on a large database to get some stats out of the database. I want these stats to be in-memory so other programs can use them without going to a database. I was thinking of how to structure them, and after trying to set up some complicated nested dictionaries, I realized that a good representation would be an SQL table. I don't want to store the data back into the persistent database, though. Are there any in-memory implementations of an SQL database that supports querying the data with SQL syntax?

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• Reliable portability for C code without relying on the preprocessor

  - by Yktula

  Relying on the preprocessor and predefined compiler macros for achieving portability seems hard to manage. What's a better way to achieve portability for a C project? I want to put environment-specific code in headers that behave the same way. Is there a way to have the build environment choose which headers to include? I was thinking that I'd put the environment-specific headers into directories for specific environments. The build environment would then just copy the headers from the platform's directory into the root directory, build the project, and then remove the copies.

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• ASP.NET MVC AuthorizeAttribute passing values to ActionMethod?

  - by subskii

  Hi everyone I'm only a newcomer to ASP.NET MVC and am not sure how to achieve a certain task the "right way". Essentially, I store the logged in userId in HttpContext.User.Identity and have written an EnhancedAuthorizeAttribute to perform some custom authorization. In the overriden OnAuthorization method, my domain model hits the database to ensure the current user id can access the passed in routeValue "BatchCode". The prototype is: ReviewGroup GetReviewGroupFromBatchCode(string batchCode); It will return null if the user can't access the ReviewGroup and the OnAuthorization then denies access. Now, I know the decorated action method will only get executed if OnAuthorization passes, but I don't want to hit the database a second time to get the ReviewGroup again. I am thinking of storing the ReviewGroup in HttpContext.Items["reviewGroup"] and accessing this from the controller at the moment. Is this a feasible solution, or am I on the wrong path? Thanks!

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• Creating an installer with WPF forms, packaged files and custom setup actions in C#

  - by RodH257

  I'm trying to create a way of deploying a set of tools (which are add-ins to 3rd party software) to my users. I would like to do the following: User Enters Serial Dlls in their directory structure is extracted to program files a file is copied to a location in ProgramData (this registers my add-ins to the 3rd party application) Online activation for software is performed Can anyone point me into the right direction for this? I had a look at deployment projects in Visual Studio but I'm not sure if they are what I'm after. Main problem is they are ugly, I would like to have a nice WPF installer, and have a more custom experience. But I guess that can be traded off if its going to make things easier. I was thinking, I could just make my own C# project that extracts the files, but I have no idea how to package them up and extract them all as part of one download (like the MSI files that the deployment projects create). Can anyone point me in the right direction?

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• Inheriting from the web client class

  - by robUK

  Hello, C# 2008 I am not sure how much work there is to inheriting from the web client class. Currently I am using it in my project. And I can't change to anything else. The customer would like to have a timeout after a certain period of time. The web client doesn't have this. So rather than re-invent the wheel, I am thinking of inheriting from the web client and adding this property. Do you think this is a suitable solution? Could it mean more work just to add this. What is the easiest way to go about this? Many thanks,

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• Implementing a Suspension or Penalty System for Users in ASP.NET MVC

  - by Maxim Z.

  I'm writing a site in ASP.NET MVC that will have user accounts. As the site will be oriented towards discussion, I think I need a system for admins to be able to moderate users, just like we have here, on Stack Overflow. I'd like to be able to put a user into a "suspension", so that they are able to log in to the site (at which point they are greeted with a message, such as, "Your account has been suspended until [DATE]"), but are unable to do the functions that users they would normally be able to do. What's the best way of implementing this? I was thinking of creating a "Suspended" role, but the thing is, I have a few different roles for normal users themselves, with different privileges. Have you ever designed a feature like this before? How should I do it? Thanks in advance.

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• SQLServer 2008 Pivot

  - by Mitch

  I need to show some information in a graph, the data is held in a SQL Server 2008 table. The graph is expecting 2 columns, one for QuestionNumber and the other for Score. The table containing the data has column names that correspond to the question numbers ie A1, A2, A3, A4, B1, B2, B3, B4, C1, C2. Each question is given a score of 1 to 5. I need to show a graph where the X axis shows A1, A2, A3 etc and the Y axis shows the score. I'm thinking I somehow need to rotate the data to achive this, but I'm not sure how. Maybe a different technique can acheive this rather that a Rotate, so I'm open to any ideas.

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• Virtual-machine running from DVD ?

  - by umanga

  Greetings all, I have this application which uses Tomcat and PostgreSQL (only involve database reads, no writes). I need to make this application runnable from a DVD.(target platform is Windows). So I was thinking to do these: 1) In a VirtualMachine (i prefer virtualbox) install lightweight linux distro. 2) Install Tomcat and Postgre, 3) Write virtualmachine into DVD which loads above virtualmachine image automatically when executed. But I am not quite sure whether I can do step 3.Or is it possible ? Any tips?

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• Is there a declarative language for data definitions?

  - by Jekke

  Reading about WPF and thinking about my application's data store at the same time led me to wonder if there are any languages or tools that allow you to define relational data in a declarative way? A shallow Google search suggests no such thing exists. Yet it seems so obviously useful. The kind of tool I have in mind would declaratively describe (at least) entities, relationships and views is a platform-agnostic way that would act as an abstraction layer between data-driven applications and their datastores. Does any such tool exist?

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• Best practices for using memcached in Rails?

  - by Matt

  Hello everybody, as database transcations in our app are getting more and more time consuming, we have started to use memcached to reduce the amount of queries passed to MySQL. All in all, it works fine and really saves a lot of time. But as caching was "silently appearing" as a workaround to give the app more juice, a lot of our models now contain code like this: def self.all_cached Rails.cache.fetch('object_name') { find( :all, :include => [associations]) } end This is getting more and more a pain as filling and flushing the cache happens in several classes accross the application. Now, I was wondering if there was a better way to abstract memcached logic to make it more powerful and easy to use across all needed models? I was thinking about having some kind of memcached-module which is included in all needed modules. But before playing around, I thought: Let's ask experts first :-) Thanks Matt

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• Word Jumble Algorithm

  - by MasterMax1313

  Given a word jumble (i.e. ofbaor), what would be an approach to unscramble the letters to create a real word (i.e. foobar)? I could see this having a couple of approaches, and I think I know how I'd do it in .NET, but I curious to see what some other solutions look like (always happy to see if my solution is optimal or not). This isn't homework or anything like that, I just saw a word jumble in the local comics section of the paper (yes, good ol' fashioned newsprint), and the engineer in me started thinking.

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• SQL Server - Query Short-Circuiting?

  - by Sam Schutte

  Do T-SQL queries in SQL Server support short-circuiting? For instance, I have a situation where I have two database and I'm comparing data between the two tables to match and copy some info across. In one table, the "ID" field will always have leading zeros (such as "000000001234"), and in the other table, the ID field may or may not have leading zeros (might be "000000001234" or "1234"). So my query to match the two is something like: select * from table1 where table1.ID LIKE '%1234' To speed things up, I'm thinking of adding an OR before the like that just says: table1.ID = table2.ID to handle the case where both ID's have the padded zeros and are equal. Will doing so speed up the query by matching items on the "=" and not evaluating the LIKE for every single row (will it short circuit and skip the LIKE)?

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• class method or named_scope?

  - by Hadi

  i would like to have your opinion in a project i am currently working on. class Product has_many :orders end class Order attr_accessor :deliverable # to contain temporary data on how many items can be delivered for this order belongs_to :product end somehow i want to have Order.all_deliverable that will calculate the Product's quantity, subtract from list of Orders until the Product is empty or there is no more Order for this Product to illustrate Product A, quantity: 20 Product B, quantity: 0 Order 1, require Product A, quantity: 12 Order 2, require Product B, quantity: 10 Order 3, require Product A, quantity: 100 so if i call Order.all_deliverable, it will give Order 1, deliverable:12 Order 3, deliverable: 8 #(20-12) i have been thinking on using named_scope, but i think the logic will be too complex to be put in a named_scope. Any suggestion? the pseudo code for all_deliverable will be something like this: go to each orders find the remaining quantity for specific product deduct the product to max amount of order, if product is not enough, add the maximum product add to the order end From what i read around in the web, named_scope deal mostly like find and have not many method calling and looping.

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• Caching linked pages in ASP.NET

  - by n0e

  I'm thinking of a way of creating a local backup for the pages I will be linking to from my site. This would be text-only, similar to Google's 'Copy' feature on the search pages. The idea is to be sure that the pages I would reference to, or cite from, do not dissapear from the Web in the near future. I know I could just keep local copies, but I will have A LOT of citations. What would be the best way of achieving this in ASP.NET? Some custom caching in database?

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• Configuring Multiple ASP.NET MVC Sites To Use a Single Database For Authentication/Membership

  - by Maxim Z.

  Is it possible for two or more ASP.NET MVC sites to use a single SQL Server database for authentication and other things? Here's how I'm thinking of setting it up: I will combine the current database of each site into one single database, prefixing the tables with the name of the site they belong to. I currently have authentication tables generated by the asp.net_regsql.exe utility. How should I combine those tables? I'm guessing that the way to do it is to somehow set the "application_id" column in those tables... Thanks in advance.

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• Smartest way to draw 100+ images on screen

  - by Henrik

  Hello all, First of all I'm a newbie when it comes to Android programming. So if this question is totally stupid please delete it ASAP :-). Question: I'm going to draw a grid of 10x10 PNG images. Each image is 32x32 px. All of the images are unique. I'm thinking that the easiest way seems to be to put each image in an ImageView. If adding all ImageView's to the layout would this give me some kind of performance hit? Would there be any smarter way to draw these images? Thanks. / Henrik

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• Unique identifiers for users

  - by Christopher McCann

  If I have a table of a hundred users normally I would just set up an auto-increment userID column as the primary key. But if suddenly we have a million users or 5 million users then that becomes really difficult because I would want to start becoming more distributed in which case an auto-increment primary key would be useless as each node would be creating the same primary keys. Is the solution to this to use natural primary keys? I am having a real hard time thinking of a natural primary key for this bunch of users. The problem is they are all young people so they do not have national insurance numbers or any other unique identifier I can think of. I could create a multi-column primary key but there is still a chance, however miniscule of duplicates occurring. Does anyone know of a solution? Thanks

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• Write wave files to memory in Java

  - by Cliff

  I'm trying to figure out why my servlet code creates wave files with improper headers. I use: AudioSystem.write( new AudioInputStream( new ByteArrayInputStream(memoryBytes), new AudioFormat(22000, 16, 1, true,false), memoryBytes.length ), AudioFileFormat.Type.WAVE, servletOutputStream ); taking a byte array from memory containing raw PCM samples and a servlet output stream that gets returned to the client. In the result I get a normal wave file but with zeros in the chunk size fields. Is the API broken? I would think that the size could be filled in using the size passed in the audio input stream. But now, after typing this out I'm thinking its not making this info available to the outer write() method on AudioSystem. It seems like the AudioSystem.write call needs a size parameter unless it is able to pull the size from the stream... which wouldn't work with an arbitrary sized stream. Does anyone know how to make this example work?

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• How do I use the Silicon Laboratories IDE with SDCC?

  - by David Cary

  I'm thinking about using a microcontroller with an 8051 core from Silicon Laboratories. I hope that I can use C rather than assembly language, so I installed SDCC. I installed the "Silicon Laboratories IDE" to download the executable binaries to the on-chip Flash program memory. It also supposedly can be set up (under the Project Tool Chain Integration menu) to use "any" 8051 compiler. I tried to set it up to use SDCC, but every time I hit the "Assemble/Compile File" button it tells me "Compiler process did not sucessfully complete." How do I get new C code I write onto the SiLabs C8051F310 chip? Is there a web site with a step-by-step HOWTO? (Would it be easier to use a MAKEFILE that calls SDCC, only using the "Silicon Laboratories IDE" for the very last step of downloading the executable binary to the chip?)

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• Thoughts/Input about Database Design for a CMS

  - by dallasclark

  I'm just about to expand the functionality of our own CMS but was thinking of restructuring the database to make it simpler to add/edit data types and values. Currently, the CMS is quite flat - the CMS requires a field in the database for every type of stored value (manually created). The first option that comes to mind is simply a table which keeps the data types (ie: Address 1, Suburb, Email Address etc) and another table which holds values for each of these data types. Just like how Wordpress keeps values in the 'options' table, PHP serialize would be used to store an array of values. The second option is how Drupal works, the CMS creates tables for every data type. Unlike Wordpress, this can be a bit of an overkill but really useful for SQL queries when ordering and grouping by a particular value. What's everyone's thoughts?

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• Is POSTing a Dictionary to an .NET MVC action possible?

  - by Brenton Alker

  I have a form which contains a series of fields like: <input type="text" name="User[123]" value="Alice" /> <input type="text" name="User[456]" value="Bob" /> ... Where the index of the User array (123 and 456) are ID's associated with the value. I'm trying to update these values in the controller. My thinking is that a Dictionary that maps ID to name would work, but creating the action like: public void Save(Dictionary<string, string> user) { // ... } results in the user parameter being null. So, is passing a Dictionary possible? or, is there another method to achieve this?

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• How to dynamically load & unload a TinyMCE Plugin

  - by Matt Simpson

  Does anyone know if there is a way I can dynamically load and unload a TinyMCE plugin after TinyMCE has already been loaded? Specifically, I'm thinking about asking the user whether or not they wish to load the fullpage plugin using perhaps a radio button or something above TinyMCE: <input type="radio" name="fullpage" value="enabled" /> Enable Fullpage Plugin<br /> <input type="radio" name="fullpage" value="disabled" /> Disable Fullpage Plugin<br /> <textarea name="tinymce" id="tinymce">...</textarea> I suppose I could destroy the original instance and load a new config (one for enabled / one for disabled), but it seems as though there should be a more elegant way of loading and unloading plugins.

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• [jquery/javascript] Trigger function when mouse click inside textarea AND type stop typing...

  - by marc

  Welcome, In short, my website use BBcode system, and i want allow users to preview message without posting it. I'm using JQuery library. I need 3 actions. 1) When user click in textarea i want display DIV what will contain preview, i want animate opening. 2) When user typing, i want dynamical load parsed by PHP code to DIV. (i'm still thinking what will be best option... refresh every 2 seconds, or maybe we can detect and refresh after 1 second of inactivity [stop typing]) 3) When user click outside textarea i want close preview div with animation. For example the PHP parser will have patch /api/parser.php and variable by POST called $_POST['message']. Any idea my digital friends ?

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