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  • ANTLR, Dynamic variables

    - by JTS
    Hello, I have an ANTLR grammar that can parse and evaluate simple expressions like 1+2*4, etc. What I would like to do is to evaluate expressions like 2+$a-$b/4 where the $ variables are dynamic variables, that come from an external source and are continuously updated. Is there any design pattern on how to do this using ANTLR, best practices, etc? Shall I "substring" the $a with the updated value ($a - 4.34) A nicer way to do this? Thx

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  • Form Builder GUI for PHP

    - by Alan Storm
    I'm looking around for an open source form building package for PHP, and figured the hive-mob-mind of StackOverflow might be able to tilt me in the right direction. Specifically, I'm looking for a form/survey builder application. I want something that lets an end user use a web based GUI to create and configure/surveys and web-based forms. What are the de-facto standard tools/packages that people use for this kind of thing these days. I'm interested in software packages, not in hosted services.

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  • Where in an Eclipse workspace is the list of projects stored?

    - by Kris Pruden
    I use eclipse with "external" projects - i.e. projects created from existing source. Poking around in the workspace files, I cannot find any reference to these projects. My question is: how does eclipse keep track of these projects? I'd like to be able to add such a project to the workspace automatically (by generating .project and .classpath files)..

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  • GNU Smalltalk text interface hard to use

    - by None
    I built GNU Smalltalk from source on my Mac because I couldn't get it working using fink and I found VMs like Squeak hard to understand. When I run the gst command it works fine, but unlike command line interfaces such the Python and Lua ones, it is hard to use because when I use the left or right arrow keys, I want the cursor to move left or right, but instead it inserts text like "^[[D". I understand why it does this but is there any way to fix it so it is more usable?

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  • Animation effect on C#

    - by Optimizer
    Can someone point me to a C# open source implementaion with a simple image animations. e.g. I feed the input image to animator, and the animation code produces a few dozen of images which if displayed sequentially looks like animation. I am not something extremely fancy - a simple DirectX filter like animations would do. Thank you.

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  • radgridview delete update in asp.net

    - by abhi
    i have written the follwing to display data from the datagrid and den insert new rows but how do i perform update and delete plss help here's my code using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using Telerik.Web.UI; using System.Data.SqlClient; public partial class Default6 : System.Web.UI.Page { string strQry, strCon; SqlDataAdapter da; SqlConnection con; DataSet ds; protected void Page_Load(object sender, EventArgs e) { strCon = "Data Source=MINETDEVDATA; Initial Catalog=ML_SuppliersProd; User Id=sa; Password=@MinetApps7;"; con = new SqlConnection(strCon); strQry = "SELECT * FROM table1"; da = new SqlDataAdapter(strQry, con); SqlCommandBuilder cmdbuild = new SqlCommandBuilder(da); ds = new DataSet(); da.Fill(ds, "table1"); RadGrid1.DataSource = ds.Tables["table1"]; RadGrid1.DataBind(); Label3.Visible = false; Label4.Visible = false; Label5.Visible = false; txtFname.Visible = false; txtLname.Visible = false; txtDesignation.Visible = false; } protected void Submit_Click(object sender, EventArgs e) { Label3.Visible = true; Label4.Visible = true; Label5.Visible = true; txtFname.Visible = true; txtLname.Visible = true; txtDesignation.Visible = true; } protected void Button2_Click(object sender, EventArgs e) { DataSet ds = new DataSet("EmployeeSet"); da.Fill(ds, "table1"); DataTable EmployeeTable = ds.Tables["table1"]; DataRow row = EmployeeTable.NewRow(); row["Fname"] = txtFname.Text.ToString(); row["Lname"] = txtLname.Text.ToString(); row["Designation"] = txtDesignation.Text.ToString(); EmployeeTable.Rows.Add(row); da.Update(ds, "table1"); //RadGrid1.DataSource = ds.Tables["table1"]; //RadGrid1.DataBind(); txtFname.Text = ""; txtLname.Text = ""; txtDesignation.Text = ""; } protected void RadGrid1_DeleteCommand(object source, GridCommandEventArgs e) { } } }

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  • BASH - How to retrieve rows from a file from #SOF to #EOF

    - by Charlie
    How to retrieve rows from a file from #SOF to #EOF in source.sh #SOF "Lorem ipsum dolor sit amet" "Vivamus pretium enim" "Est accumsan enim magnis" #EOF #SOF "Eleifend tincidunt id justo" "Tellus ut tincidunt vel ac a orci" "Sapien Nullam Sed nunc" "Vestibulum est accumsan enim" #EOF #SOF "Consequat mauris mollis montes" #EOF I need to get 3 files in target_1.sh "Lorem ipsum dolor sit amet" "Vivamus pretium enim" "Est accumsan enim magnis" in target_2.sh "Eleifend tincidunt id justo" "Tellus ut tincidunt vel ac a orci" "Sapien Nullam Sed nunc" "Vestibulum est accumsan enim" in target_3.sh "Consequat mauris mollis montes" Tell someone how to do it? thank you for your help

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  • LotusNotes as a datasource for a .net C# site

    - by AlexFreitas
    Is it possible to have a connection to LotusNotes and use it as a data source for a C# project? We use LN for email/calendar :(... and management wants a web page that would interact with the calendar. I think this can all be done within Notes, but I would much rather do it in .net. They also want some very specific functionality, some of which I'm not really sure can even be done in Notes. Cheers, -Alex

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  • Google image Swirl - interactive information visualization

    - by skyde
    I have seen this image swirl effect on a visual thesaurus. Is there any open source code for this? Or research paper explaining how they made it. I don't care about the algorithm to match similar objects. I only am wondering about the effects. From what i understand they are called recursive orbital diagram. Screenshot: google Wonder Wheel google image swirl

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  • Can Perforce and SourceSafe co-exist in Visual Studio?

    - by Chris
    Visual Studio 2008, to be more specific. We're testing out moving to Perforce for source control, so I'd like to install the P4SCC plugin to monkey around with. However, I'd also like to continue using SourceSafe's IDE capabilities for projects that haven't been moved over yet. Can the two co-exist peacefully, or is it one or the other for a specific install of VS?

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  • Mercator projection world map with Geoserver and Openlayers

    - by bjax-bjax
    I'm trying to render a world map shapefile on my Geoserver with a Mercator projection. I've tried declaring the SRS on Geoserver and defining EPSG projections of 3785 or 900913 in Openlayers with no success. I've also tried to reproject the shapefile using ogr2ogr but the result is slightly off. Original: Converted: Here's the command used: ogr2ogr -t_srs EPSG:3785 target.shp source.shp I'm new to this technology & mapping concepts. Any pointers would be greatly appreciated!

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  • Entity Framework + stored procedure with paging

    - by Eatdoku
    I am using Entity Framework now and using a stored procedure to populate my entity. Where there is no problem with populating my entity, but when i trying to bind the result to a gridview control with "Enable Paging" set to true, it gives an error saying "The data source does not support server-side data paging." I am using stored procedure because one of the table column is FullTextIndexed, and there is a requirement to be able to search on that field. Can anyone tell me how the paging would work in this situation?

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  • Generate terminal graphics

    - by Werner
    Hi, which open source software options exist for generating terminal graphics? I mean, there is for instance the nice matplotlib, which can generate beautiful plots from data, in PNG or similar formats. But there are similar alternatives for generating just kind of ascii graphics? Thanks

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  • How do you unit test a class that's meant to talk to data?

    - by Arda Xi
    I have a few repository classes that are meant to talk to different kinds of data, deriving from an IRepository interface laid out like so: In implementations, the code talks to a data source, be this a directory of XML files or a database or even just a cache. Is it possible to reliably unit test any of these implementations? I don't see a mock implementation working, because then I'm only testing the mock code and not the actual code.

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  • Do you keep a code bank?

    - by calico-cat
    I've done consulting work for years and I've got code snippets in various languages lying around that I'll re-use for various projects. The collection is getting pretty large and I want to set up a code bank for myself. What code banks do people use? Do you find it helps, or is there some better way of organising my reusable code snippets? (If one does exist, I'd prefer it be open-source, accessible via a web browser, language-agnostic, and maybe colour the code the way Stackoverflow does :)

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  • HTML5 <audio> Safari live broadcast vs not

    - by Peter Parente
    I'm attempting to embed an HTML5 audio element pointing to MP3 or OGG data served by a PHP file . When I view the page in Safari, the controls appear, but the UI says "Live Broadcast." When I click play, the audio starts as expected. Once it ends, however, I can't start it playing again by clicking play. Even using the JS API on the audio element and setting currentTime to 0 fails with an index error exception. I suspected the headers from the PHP script were the problem, particularly missing a content length. But that's not the case. The response headers include a proper Content- Length to indicate the audio has finite size. Furthermore, everything works as expected in Firefox 3.5+. I can click play on the audio element multiple times to hear the sound replay. If I remove the PHP script from the equation and serve up a static copy of the MP3 file, everything works fine in Safari. Does this mean Safari is treating audio src URLs with query parameters differently than URLs that don't have them? Anyone have any luck getting this to work? My simple example page is: <!DOCTYPE html> <html> <head></head> <body> <audio controls autobuffer> <source src="say.php?text=this%20is%20a%20test&format=.ogg" /> <source src="say.php?text=this%20is%20a%20test&format=.mp3" /> </audio> </body> </html> HTTP Headers from PHP script: HTTP/1.x 200 OK Date: Sun, 03 Jan 2010 15:39:34 GMT Server: Apache X-Powered-By: PHP/5.2.10 Content-Length: 8993 Keep-Alive: timeout=2, max=98 Connection: Keep-Alive Content-Type: audio/mpeg HTTP Headers from direct file access: HTTP/1.x 200 OK Date: Sun, 03 Jan 2010 20:06:59 GMT Server: Apache Last-Modified: Sun, 03 Jan 2010 03:20:02 GMT Etag: "a404b-c3f-47c3a14937c80" Accept-Ranges: bytes Content-Length: 8993 Keep-Alive: timeout=2, max=100 Connection: Keep-Alive Content-Type: audio/mpeg I tried hard-coding the Accept-Ranges header into the script too, but no luck.

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  • Latex and Memoir class, guillemot left/right.

    - by Alberto
    Hi all! I am using memoir class with latex, and I need the two characters: "«", and "»". I found the following commands: \guillemotright and \guillemotleft, but they look very ugly. Is there something wrong in what I am doing? Latex source: http://pastebin.com/1w0J6jbN Result: http://cl.ly/17b03c953371c4c049e0 Any help would be very appreciated. Thanks! —Albé

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  • Webview duplicate HTML problem

    - by oriharel
    Hi all, I load a url over the web containing images (their source is another url). when then view loads the html, it loads it without the images. after few milliseconds, the images come along but then the html is redrawn, and it does so over the previous html, causing it the web view to hold 2 htmls one over the other (very ugly result). anyone knows why does that happen? how can I avoid that? thanks, Ori

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