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  • Ruby socket server thread question: how to send to all clients?

    - by Paul
    I'm making a TCP socket server(ruby). A thread is created for each connected client. At some point I try to send data to all connected clients. The thread aborts on exception while trying.(ruby 1.8.7) require 'socket' # I test it home right now server = TCPServer.new('localhost', 12345); while(session = server.accept) #Here is the thread being created Thread.new(session) do |s| while(msg = s.gets) #Here is the part that causes the error Thread.list.each { |aThread| if aThread != Thread.current #So what I want it to do is to echo the message from one client to all others #But for some reason it doesn't, and aborts on the following string aThread.print "#{msg}\0" end } end end Thread.abort_on_exception = true end What am I doing wrong?

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  • Beginner SQL question: arithmetic with multiple COUNT(*) results

    - by polygenelubricants
    Continuing with the spirit of using the Stack Exchange Data Explorer to learn SQL, (see: Can we become our own “Northwind” for teaching SQL / databases?), I've decided to try to write a query to answer a simple question (on meta): What % of stackoverflow users have over 10,000 rep?. Here's what I've done: Query#1 SELECT COUNT(*) FROM Users WHERE Users.Reputation >= 10000 Result: 556 Query#2 SELECT COUNT(*) FROM USERS Result: 227691 Now, how do I put them together into one query? What is this query idiom called? What do I need to write so I can get, say, a one-row three-column result like this: 556 227691 0,00244190592

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  • AS3 Pass FlashVars to loaded swf

    - by Robin
    Hi I have a A.swf which loads B.swf onto a movieclip and needs to pass it some FlashVars. When loading B.swf with html, I can pass FlashVars fine. When passing from A.swf, it gets a Error #2044: Unhandled ioError:. text=Error #2032: Stream Error. URL: file: The code in A.swf is var request:URLRequest = new URLRequest ("B.swf"); var variables : URLVariables = new URLVariables(); variables.xml = "test.xml"; // This line causes the error 2044, else B.swf loads fine with FlashVars request.data = variables; loader.load (request); In B.swf, it is checking the Flashvars like so. It works fine from html side this.loaderInfo.parameters.xml

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  • How to preserve hyperlink when submitting via php form into MySQL

    - by TheTub
    Hi All, I've created a form that stores free text fields into a MySQL database. All works fine and the data is displayed back as intended when viewed. Except for one niggle. In an attempt to prevent malicious attacks I have used mysql_real_escape_string to remove any unwanted code from the input. However, I need to be able to preserve hyperlinks and basic html. For example, I want to store the following: <p align="left">Please follow this <a href="link.html">link</a></p> But the link is being stored as \"link.html\" as the quotes are being escaped. How can I preserve this link and other html? Many thank TT

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  • Sample the deltas between values using boost::accumulators

    - by Checkers
    I have a data set with N integers (say, 13, 16, 17, 20) where each next sample is incremented by some value (3, 1, 3 in this case) and I want to use boost::accumulators::accumulator_set to find various statistics of the second sequence. I want to be able to do something like this: accumulator_set< double, features< tag::mean > > acc; ... acc(13); acc(16); acc(17); acc(20); ...BUT sampling the differences instead of the actual values. How can I do that with accumulator_set without keeping track of the last value manually?

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  • Setting up a SQL Membership Provider and attaching the MDF file in Visual Studio 2008

    - by aubreyrhodes
    I'm trying to set up a SQL Membership Provider for an ASP.NET MVC 1.0 and I'm having problems setting up the tables and stored procedures in the database. I've tried attaching both the applications current database and a blank database to my local SQLEXPRESS instance (using SSEUtil) and then running the aspnet_regsql wizard against them. When I detach the mdf file and try to load it in Visual Studio 2008, the data connection in the server explorer shows that the database has no tables or stored procedures. Am I missing a step or something here? I've been having a heap of trouble with compatibility between Visual Studio and SQLEXPRESS.

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  • Add Reference to a WCF Service Executable

    - by Sphynx
    I have 3 projects in my solution. 1 - client, 2 - server, 3 - WCF service library. Server executable exposes the service provided in the library. I need to add a reference to it, rather than to the library directly. When I open "Add Service Reference" and click "Discover", it only lists the library data, and doesn't list the executable server option. How do I reference a WCF executable service, so the client code would be generated automatically? I use VS 2010. Thanks for your help.

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  • Sales figures not displayed in form

    - by Brian Wilson
    Trying to calculate total sales for 5 items, 3 stores. Here's a s/s of what Im getting, along with my code. What am I missing/doing wrong? (p.s. It's not returning an error code in 'debug') Public Class Form1 Private Sub btnCalc_Click(sender As Object, e As EventArgs) Handles btnCalc.Click Dim ttlsales As Double 'set up array data Dim sales(,) As Integer = {{25, 64, 23, 45, 14}, {12, 82, 19, 34, 63}, {54, 22, 17, 43, 35}} Dim price() As Double = {12.0, 17.95, 95.0, 86.5, 78.0} 'mark totals Dim totals(2) As Double For store As Integer = 0 To 2 For item As Integer = 0 To 4 Next Next 'display output lstOut.Items.Add("Sales Per Store") For store As Integer = 0 To 2 lstOut.Items.Add(store + 1 & ":" & FormatCurrency(totals(store))) ttlsales += totals(store) Next lstOut.Items.Add("Total Sales: " & FormatCurrency(ttlsales)) End Sub End Class

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  • Stop propagating deletes

    - by Mark
    Is it just me or is anyone else finding EF very difficult to use in a real app :( I'm using it as the data layer and have created custom business objects. I'm having difficulty converting the business objects back to EF objects and updating/adding/deleting from the database. Does anyone know a good, simple example of doing this? Actually the current problem that's driving me nuts is when I delete something EF tries to delete other related stuff as well. For example, if I delete an invoice it will also delete the associated customer! Seems odd. I can't figure out how to stop it doing this. // tried: invoiceEfData.CustomerReference = null; // also tried invoiceEfData.Customer = null; context.DeleteObject(invoiceEfData); context.SaveChanges(); // at this point I get a database error due to it attempting to delete the customer

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  • How do I do client-side validation in WPF using WCF RIA Services

    - by lsb
    Hi! I've created a WCF RIA Service that I'd like to use with a WPF application. I've added several System.ComponentModel.DataAnnotations validation rules on the entities meta-data, all which work great on the server when I call .SubmitChanges(changeSet) from the client. I'd also like to validate my entities on the client side before I sumbit my changes to the server but I have no idea how to do so. Any help in this regard would be greatly appreciated! Thanks....

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  • The CHOICE : Firebird or H2

    - by blow
    Hi, i have to choice a database to use in server-mode for a java desktop application. I think both are great java database. In my opinion (im NOT well-informed): H2 PRO Is java based Develeopment say it is very very fast Easy to install, configure and use with java application H2 CONS Is a young project Reliability doubt for commercial porpouse FireBird PRO Rock solid project Well documented Should be fast and well optimized for large data Has a java driver... FireBird CONS It is not java based ... ? So, i can't choice between this great db, can i have a suggestion? Thank.

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  • How to make an ISO copy of Linux-filesystem and user files of VPS Debian based?

    - by moogeek
    Hello! I have a Debian-Based VPS on some hosting. I want to migrate from it and i need to make a full copy of all Linux-filesystem (and installed packages) + all home directory with website files. And then pack/convert it to ISO image so that to use it on cloud hostings like Amazon. The problem is that i have only ssh root access. Hosting support can't do that for me. Another part of the question - is it possible to enlarge the Linux-filesystem by not re-installing it and using the free space of home directory? Is it possible to do? I guess it is possible with rsync or something like that. Will my Mysql databes copy together with all other data? Thanks in advance!

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  • SOAP, REST or just XML for Objective-C/iPhone vs. server solution

    - by Nicsoft
    Hello, We are going to set up a solution where the iPhone is requesting data from the server. We have the option to decide what kind of solution to put in place and we are not sure about which way to go. Regarding SOAP I think I have the answer, there are no really stable solution for doing this (I know there are solutions, but I want something stable). How about REST? Or is it better to just create our own XML? It's not going to be so complicated reguest/respons-flow. Thanks in advance!

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  • How to communicate/share a session between pages over HTTP and HTTPS

    - by spirytus
    What is common practice for coding web applications where part of the site has to be secured (e.g. checkout section) and part not necessarily, let's say homepage? As far as I know sharing sessions in between HTTP and HTTPS parts of the site is not easily possible (or is it?). What would be common approach if I wanted to display on HTTP page like homepage, shopping cart data (items) that users ordered on HTTPS pages? How those two parts of the site would communicate if necessary? Also isn't it security flaw in popular shopping carts as it seems that many of these have only checkout pages secured (SSL) and the rest not? I'm using PHP if it makes any difference.

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  • Compiled Linq Queries with Built-in SQL functions

    - by Brandi
    I have a query that I am executing in C# that is taking way too much time: string Query = "SELECT COUNT(HISTORYID) FROM HISTORY WHERE YEAR(CREATEDATE) = YEAR(GETDATE()) "; Query += "AND MONTH(CREATEDATE) = MONTH(GETDATE()) AND DAY(CREATEDATE) = DAY(GETDATE()) AND USERID = '" + EmployeeID + "' "; Query += "AND TYPE = '5'"; I then use SqlCommand Command = new SqlCommand(Query, Connection) and SqlDataReader Reader = Command.ExecuteReader() to read in the data. This is taking over a minute to execute from C#, but is much quicker in SSMS. I see from google searching you can do something with CompiledQuery, but I'm confused whether I can still use the built in SQL functions YEAR, MONTH, DAY, and GETDATE. If anyone can show me an example of how to create and call a compiled query using the built in functions, I will be very grateful! Thanks in advance.

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  • Generate Info (wrapper) Class from stored procedure

    - by Adem
    Hello everybody I am in a crucial project and I am trying to speed up the development phase by using codesmith for generating the business class DAL and info class for the tables of my project. There are about 50 tables with relationships parent child many to many and for retrieving data I have to code several inner joins in stored procedures. I have to combine fields from many tables and this makes working with the info class difficult. Is there anyway to generate info class from stored procedures or to be more exact is there a way to parse the result set of the stored procedure and to generate the info class with properties for every column in that result set. Please if anyone can give me some advice and tell me how to achieve this. Best Regards

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  • printing sequence number of a sniffed packet

    - by scatman
    i am using pcap to create a packet sniffer. i have this tcp structure: typedef struct TSP_header{ unsigned short int sport; unsigned short int dport; unsigned int seqnum; unsigned int acknum; unsigned char reserved:4, offset:4; unsigned int tcp_res1:4, //little-endian tcph_hlen:4, //length of tcp header in 32-bit words tcph_fin:1, //Finish flag "fin" tcph_syn:1, //Synchronize sequence numbers to start a connection tcph_rst:1, //Reset flag tcph_psh:1, //Push, sends data to the application tcph_ack:1, //acknowledge tcph_urg:1, //urgent pointer tcph_res2:2; unsigned short int tcph_win; unsigned short int tcph_chksum; unsigned short int tcph_urgptr; }TSP_header; how can i print the sequence number? shou i use htons(sequence_number)?? coz it isn't working this way!!

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  • How to use Web-View as page by page while scrolling or Flinging/swiping?

    - by Jetti
    Hi, I want to convert an .docx/.doc file to html and displaying in emulator with help of Web- view. But i am displaying entire data into webview as Single page(we need to scroll many times). So, i want to match the content of .docx file with webview as pages or put some buttons or gestures to get next page.But i unable to display text as pages in Web-View. is there any solution or suggestion to get as pages? How to get the height and width of webview? Thanks

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  • Is there any simple way to test two PNGs for equality?

    - by Mason Wheeler
    I've got a bunch of PNG images, and I'm looking for a way to identify duplicates. By duplicates I mean, specifically, two PNG files whose uncompressed image data are identical, not necessarily whose files are identical. This means I can't do something simple like compare CRC hash values. I figure this can actually be done reliably since PNGs use lossless compression, but I'm worried about speed. I know I can winnow things down a little by testing for equal dimensions first, but when it comes time to actually compare the images against each other, is there any way to do it reasonably efficiently? (ie. faster than the "double-for-loop checking pixel values against each other" brute-force method?)

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  • How to copy a formatted cell in Excel to a table cell in Word using .NET?

    - by Harry Nath
    I'm attempting to copy cells, one at a time, from an Excel 2003 (or 2007) spreadsheet to a Word 2003 (or 2007) table. I'd like the code to be version-agnostic, and so am using late binding. The formatting of the contents of the Excel cell, such as color, underline, strike-through, needs to be preserved. My approach is to use a Word doc as a template. It has a table at the top which I can copy to the end of the doc, add rows as needed, and fill in the word table cells with the data from the excel spreadsheet. Unfortunately, all the formatting disappears. All I get is the text itself.

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  • How to SET ARITHABORT ON for connections in Linq To SQL

    - by Laurence
    By default, the SQL connection option ARITHABORT is OFF for OLEDB connections, which I assume Linq To SQL is using. However I need it to be ON. The reason is that my DB contains some indexed views, and any insert/update/delete operations against tables that are part of an indexed view fail if the connection does not have ARITHABORT ON. Even selects against the indexed view itself fail if the WITH(NOEXPAND) hint is used (which you have to use in SQL Standard Edition to get the performance benefit of the indexed view). Is there somewhere in the data context I can specify I want this option ON? Or somewhere in code I can do it?? I have managed a clumsy workaround, but I don't like it .... I have to create a stored procedure for every select/insert/update/delete operation, and in this proc first run SET ARITHABORT ON, then exec another proc which contains the actual select/insert/update/delete. In other words the first proc is just a wrapper for the second. It doesn't work to just put SET ARITHABORT ON above the select/insert/update/delete code.

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  • using bash: write bit representation of integer to file

    - by theseion
    Hullo First, I want to use bash for this and the script should run on as many systems as possible (I don't know if the target system will have python or whatever installed). Here's the problem: I have a file with binary data and I need to replace a few bytes in a certain position. I've come up with the following to direct bash to the offset and show me that it found the place I want: dd bs=1 if=file iseek=24 conv=block cbs=2 | hexdump Now, to use "file" as the output: echo anInteger | dd bs=1 of=hextest.txt oseek=24 conv=block cbs=2 This seems to work just fine, I can review the changes made in a hex editor. Problem is, "anInteger" will be written as the ASCII representation of that integer (which makes sense) but I need to write the binary representation. How do I tell the command to convert the input to binary (possibly from a hex)?

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  • Export contacts from ACT, Salesforce, Outlook, QuickBooks, etc.

    - by Mike Wallace
    What API's / SDK's / software tools are available to export contacts from popular CRM and accounting packages? What I'd like to do is offer an address book in my web application and have a button that says "Upload your contacts from X". The user could then click a few buttons and his contacts would be automagically uploaded from X. A company called Plaxo has a widget that does exactly what I am looking for, BUT: They only support a limited number of data sources (I am most interested in ACT, Salesforce, Outlook, and QuickBooks), and They only support e-mail addresses. I am most interested in street addresses ("123 Main St, Anywhere, CA, 90123")

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  • Flatten a PHP array

    - by deadkarma
    Say I have a form with these fields, and cannot rename them: <input type="text" name="foo[bar]" /> <input type="text" name="foo[baz]" /> <input type="text" name="foo[bat][faz]" /> When submitted, PHP turns this into an array: Array ( [foo] => Array ( [bar] => foo bar [baz] => foo baz [bat] => Array ( [faz] => foo bat faz ) ) ) What methods are there to convert or flatten this array into a data structure such as: Array ( [foo[bar]] => foo bar [foo[baz]] => foo baz [foo[bat][faz]] => foo bat faz )

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  • Resources for widget creation

    - by Kenji Crosland
    My rails app is about to go live and I'm trying to figure out how to create a widget based on data on the site. My Javascript is not too hot--limited to the O'reilly head first book on JS. I can read simple Javascript okay but when it comes to writing it I'm a little lost. That said, I hope to roll out a widget, maybe a wordpress plugin too soon after my app is launched. Does anyone know of any rails plugins, javascript templates, tutorials or books that can get me going? I did ask a similar question before here: But my limited knowledge of JS kept me from implementing the suggested answer properly.

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