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  • Prerequistes for learning how to code a facebook application

    - by Peter
    I am facing a really tough time doing this. I haven't done much on web development before this. I know HTML and dats it. What else do I need to learn in order to start coding a good facebook app (specifically scripting languages like JS, PHP etc). I have already created a test application using a web hosting site. Time is of the essence here.

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  • How to avoid fast rate page refresh in ASP.NET ?

    - by eugeneK
    I have a page that shows statistics for users, this cannot be cached because each user has different statistics and there are many thus the real time query must be made. What the way to avoid database server overload when user will click F5's to refresh or to ask different queries in short time intervals ?

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  • connection to apache server switches sockets connection

    - by Newben
    I have just post a question but I post an other one because the problem is not the one I had in thought when asking the latter. So, I am running some rails app on osx, when I run rails s, everything works fine. If I shut down the apache server (mamp) and if I run rails s again, I have this message Can't connect to local MySQL server through socket '/Applications/MAMP/tmp/mysql/mysql.sock', which for sure is normal. For info, my mamp server is running, and the connection must pass through /Applications/MAMP/Library/bin/mysql, so I aliased it by setting in my bash profile : alias mysql="/Applications/MAMP/Library/bin/mysql" Now, when I launch a rails generate command type, I get this message : /$root/vendor/bundle/ruby/2.0.0/gems/mysql2-0.3.11/lib/mysql2/client.rb:44:in `connect': Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2) (Mysql2::Error) So how it can be ?

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  • Random keyboard malfunction - happens in Vista and XP

    - by Stupefy101
    For some weird reason, some of my keyboard keys of my deskop are acting very strangely. I don't remember a certain time when it started and I can't recognize any pattern as to when it happens and when it doesn't. The problem occurs in Windows XP, XP Safe Mode, Vista, and Vista Safe mode (I have a dual boot system) Here's what's happening: When I push the I, K, comma, or 8 keys (notice how they are all in the same column), instead of just getting that character, I get extra characters afterwards. For example, I'll push the k key and it will print "ksfda", pushing "I" gives me "IWREQ", comma gives me ", xvcz", pushing 8 gives me "82431". There are a couple things that I have noticed: It does not happen every time I push the key It happens in all OS and applications I have tested The characters coming after the desired ones are in the same pattern (column order: 2, 4, 3, 1 from the left of the keyboard in the same row as the key pressed. Pressing "]" will sometimes give me "]t", and if done in Notepad, will bring up the "Find" dialog window I cannot seem to remember a specific time the problem started, although I have been defragging, using TuneUp Utilities + CCleaner, and installing lots of new programs lately.

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  • DOS application to allow remote management of files over serial link

    - by tomlogic
    Harken back to the days of DOS. I have an embedded DOS handheld device, and I'm looking for a tool to manage the files stored on it. I picture an application I can launch on the device that opens COM1 up for commands to get a directory listing, send/receive files via x/y/zmodem, move/delete files, and create/move/delete directories. A Windows application can then download a recursive file listing and then manage those files (for example, synchronizing with a local directory). Keep in mind that this is DOS -- 8.3 filenames, 640K of RAM and a 19200bps serial link (yuk!). I'd prefer something with source in case we need to add additional features (for example, the ability to get a checksum of a file for change detection). Now that I've written this description, I realize I'm asking for something like LapLink or pcAnywhere. Norton no longer sells DOS versions of pcAnywhere and LapLink V for DOS seems pricy at $50. Are you aware of any similar apps from those good old days?

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  • How to disambiguate a sequence in sql?

    - by Martin
    I have a table of data which represents a series of events that persons do over time, sometimes people do the same thing several times in a row. How to select a result using MS SQL 2008 that shows only disambiguated sequences of those events? Source data: Person Event Time 1 2 1 1 2 20 1 2 33 2 1 34 1 4 43 1 2 44 2 3 45 1 2 46 1 3 50 1 3 55 Result: Person Event 1 2 2 1 1 4 1 2 2 3 1 3

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  • WebRequest using c# (VS2008) is perfectly working but not on JAVA (Ecplise)

    - by Daniel
    Hi, I'm trying to read data from a webpage, and I have to do it using JAVA. When I try to do it in Eclipse using JAVA i'm getting time out error: java.net.ConnectException: Connection timed out: connect (Using HttpURLConnection) In order to understand where is the problem I tried doing the same task using c# and VS2008, and it worked perfectly fine, no time out at all. What can be the reason for this? Thanks! Daniel

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  • Problem with IE 6 page loading.

    - by Puneet Dudeja
    I have a website which works fine in all browsers except in IE6. The pages content is inside a div loaded with a background image. The page layout gets very nasty and image does not load when the page is opened for first time, but when the same page is opened for the second time and any subsequent times, then it loads perfectly. This scenario is with every page in the site. Please help.

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  • host an asp.net webite outside of IIS

    - by boraer
    Hi everybody, I need to write an asp.net application which have to handle very large amount of data per second. Probably max5000 user may transact in same time. I think I will use WCF in back to communicate SQL server. But in front ISS can handle 5000 user in same time effectively or is there any simple way to host my application outside of IIS

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  • Is it possible to keep mysql migration running without keeping connection open?

    - by taw
    ALTER TABLE can easily take a few days - and during this time there's a non-negligible chance of connection getting terminated due to network problems. Is it possible to start ALTER TABLE (or CREATE TABLE ... SELECT ...; or some other very long running query) and leave it running without keeping connection open all the time? (the obvious solution of screen + console mysql client won't easily work as there's no ssh running on that server, only mysqld).

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  • foreach: how to iterate this

    - by ilnur777
    object(stdClass)[1] public 'inbox' => array 0 => object(stdClass)[2] public 'from' => string '55512351' (length=8) public 'date' => string '29/03/2010' (length=10) public 'time' => string '21:24:10' (length=8) public 'utcOffsetSeconds' => int 3600 public 'recipients' => array 0 => object(stdClass)[3] public 'address' => string '55512351' (length=8) public 'name' => string '55512351' (length=8) public 'deliveryStatus' => string 'notRequested' (length=12) public 'body' => string 'This is message text.' (length=21) 1 => object(stdClass)[4] public 'from' => string '55512351' (length=8) public 'date' => string '29/03/2010' (length=10) public 'time' => string '21:24:12' (length=8) public 'utcOffsetSeconds' => int 3600 public 'recipients' => array 0 => object(stdClass)[5] public 'address' => string '55512351' (length=8) public 'name' => string '55512351' (length=8) public 'deliveryStatus' => string 'notRequested' (length=12) public 'body' => string 'This is message text.' (length=21) .... .... I have this foreach, but it does not iterate address, name, deliveryStatus! Could you show how to get this data? foreach ($data->inbox as $note) { echo '<p>'; echo 'From : ' . htmlspecialchars($note->from) . '<br />'; echo 'Date : ' . htmlspecialchars($note->date) . '<br />'; echo 'Time : ' . htmlspecialchars($note->time) . '<br />'; echo 'Body : ' . htmlspecialchars($note->body) . '<br />'; }

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  • get pure text form odt file in console

    - by naugtur
    I am looking for a small linux tool that would be able to extract text from odt file. It just needs to be human-readable and it can have problems with complicated objects etc. It's almost a duplicate of this question but I need it to be small and have no dependencies on OpenOffice or X server I remember having a 1MB MS-DOS program that could render .doc files quite readibly (with some weird markup getting through from time to time), so i expect it to be possible in the linux world too ;)

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  • Django Include Aggregate Sums of Zero

    - by tomas
    I'm working on a Django timesheet application and am having trouble figuring out how to include aggregate sums that equal zero. If I do something like: entries = TimeEntry.objects.all().values("user__username").annotate(Sum("hours")) I get all users that have time entries and their sums. [{'username': u'bob' 'hours__sum':49}, {'username': u'jane' 'hours__sum':10}] When I filter that by a given day: filtered_entries = entries.filter(date="2010-05-17") Anyone who didn't enter time for that day is excluded. Is there a way to include those users who's sums are 0? Thanks

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  • SQL exclude a column using SELECT * [except columnA] FROM tableA?

    - by uu?????s
    We all know that to select all columns from a table, we can use SELECT * FROM tableA Is there a way to exclude column(s) from a table without specifying all the columns? SELECT * [except columnA] FROM tableA The only way that I know is to manually specify all the columns and exclude the unwanted column. This is really time consuming so I'm looking for ways to save time and effort on this, as well as future maintenance should the table has more/less columns. thanks!

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  • uWSGI and python virtual env

    - by user27512
    I'm trying to use uWSGI with a virtual env in order to use the Trac bug tracker on it. I've installed system-wide uwsgi via pip. Next, I've installed trac in a virtualenv $ virtualenv venv $ . venv/bin/activate $ pip install trac I've then written a simple uWSGI configuration script: [uwsgi] master = true processes = 1 socket = localhost:3032 home = /srv/http/trac/venv/ no-site = true gid = www-data uid = www-data env = TRAC_ENV=/srv/http/trac/projects/my_project module = trac.web.main:dispatch_request But when I try to launch it, it fails: $ uwsgi --http :8000 --ini /etc/uwsgi/vassals-available/my_project.ini --gid www-data --uid www-data ... Set PythonHome to /srv/http/trac/venv/ ... *** Operational MODE: single process *** ImportError: No module named trac.web.main unable to load app 0 (mountpoint='') (callable not found or import error) I think uWSGI isn't using the virtual env. When inside the virtual env, I can import trac.web.main without having an ImportError. How can I do that ? Thanks

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  • C++ priority queue structure used ?

    - by John Retallack
    While searching for some functions in C++ STL documentation I read that push and pop for priority queues needs constant time. "Constant (in the priority_queue). Although notice that push_heap operates in logarithmic time." My question is what kind of data structure is used to mantain a priority queue with O(1) for push and pop ?

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  • How to download file into string with progress callback?

    - by Kaminari
    I would like to use the WebClient (or there is another better option?) but there is a problem. I understand that opening up the stream takes some time and this can not be avoided. However, reading it takes a strangely much more amount of time compared to read it entirely immediately. Is there a best way to do this? I mean two ways, to string and to file. Progress is my own delegate and it's working good. FIFTH UPDATE: Finally, I managed to do it. In the meantime I checked out some solutions what made me realize that the problem lies elsewhere. I've tested custom WebResponse and WebRequest objects, library libCURL.NET and even Sockets. The difference in time was gzip compression. Compressed stream lenght was simply half the normal stream lenght and thus download time was less than 3 seconds with the browser. I put some code if someone will want to know how i solved this: (some headers are not needed) public static string DownloadString(string URL) { WebClient client = new WebClient(); client.Headers["User-Agent"] = "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/532.5 (KHTML, like Gecko) Chrome/4.1.249.1045 Safari/532.5"; client.Headers["Accept"] = "application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5"; client.Headers["Accept-Encoding"] = "gzip,deflate,sdch"; client.Headers["Accept-Charset"] = "ISO-8859-2,utf-8;q=0.7,*;q=0.3"; Stream inputStream = client.OpenRead(new Uri(URL)); MemoryStream memoryStream = new MemoryStream(); const int size = 32 * 4096; byte[] buffer = new byte[size]; if (client.ResponseHeaders["Content-Encoding"] == "gzip") { inputStream = new GZipStream(inputStream, CompressionMode.Decompress); } int count = 0; do { count = inputStream.Read(buffer, 0, size); if (count > 0) { memoryStream.Write(buffer, 0, count); } } while (count > 0); string result = Encoding.Default.GetString(memoryStream.ToArray()); memoryStream.Close(); inputStream.Close(); return result; } I think that asyncro functions will be almost the same. But i will simply use another thread to fire this function. I dont need percise progress indication.

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  • Creating a Web Service to automatically get information

    - by Sean P
    I want to create some sort of method of creating a web service that will run automatically and run DB queries and some API calls which will then store data that I can use/call without taking the processing or time penalty of doing it every time a user access my web service. Is this possible? If so, point me in the right direction on how to implement something like this Using vb.net and ASP.net Thanks in advance!!

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  • when to upgrade server to include more cores, versus more processors, versus additional server?

    - by gkdsp
    The server hosting market is separated into single, double, qual, etc., processors, where each processor has several cores, or CPUs. My company will offer a Linux-based web application that relies on an Apache web server and a middle tier for business logic. The middle tier is used to crunch math, and return result to a client. Many clients may access the application simultaneously. The company will start with one processor having 4 cores. I'm trying to understand how the app uses the cores and then how to scale the application as business grows, in terms of servers/processors/cores. For example, I'd assume initially one core would be used for Apache, and the other 3 used to process client's requests for math crunching... Question 1: does that mean, with the 3 cores available, I can handle 3 separate client requests simultaneously (e.g. 1 for each of 3 cores)? I mean, except for the shared RAM, is this effectively like having 3 individual machines (from pt of view or processing client requests simulaneously)? Or, only one client's request may be processed at any one time, but that client's request is divided up into up to 3 cores depending on the type of process running that does the math crunching and whether or not it can take advantage of multi threading (so the # of cores impacts how fast any one client request completes)? I'm confused about what the cores mean to the application here. Question 2: As the business grows and more client requests need to be processed, should the server be upgraded to (A) a new machine with more cores, (B) a new machine with two processors, 4 cores each, or (C) keep the original server and add another server with a single processor? Which route provides the most efficient way to scale the application, in terms of processing more client requests per time interval? Is the choice, for example, limited by RAM (when you need more RAM than box can handle it's time to add another server), or something else? Question 3: Is the total number of client requests processed simultaneously equal to the number of cores times the number of servers (minus the one core for Apache)?

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  • what is a virtual adapter

    - by numerical25
    I hear the term virtual adapter from time to time. But not exactly sure what it is. I can't exactly find a good definition online. Is there an exact definition for a virtual adapter. If so, what is it. Or what does it usually mean ?

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  • How to convert non key, value java arguments to applet params? (args like -Xmx64m)

    - by bwizzy
    I'm trying to use xvpviewer (based on TightVNC) to VNC into my VMs running on Citirx XenServer. There are a couple of caveats required with trusting the certificate from XenServer which I've got working. Essentially I'm trying to convert the java command below (which works on the command line to launch VncViewer) for use in an applet that can be accessed via HTML page. java -Djavax.net.ssl.trustStore=/tmp/kimo.jks -Xmx64m -jar VncViewer.jar HOST "/console?ref=OpaqueRef:141f4204-2240-4627-69c6-a0c7d9898e6a&session_id=OpaqueRef:91a483c4-bc40-3bb0-121c-93f2f89acc3c" PORT 443 PROXYHOST1 192.168.0.5 PROXYPORT1 443 SocketFactory "HTTPSConnectSocketFactory" I know I can put the HOST, PORT etc arguments into param tags for the applet but I'm not sure how to apply the two initial argments.

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  • How to bring application to front every 15 minutes on Mac OS X Lion?

    - by johnnyb10
    I have a free or cheap little app called Desktop Task Timer LE that I've been using to track my time as I work on various projects. I'd like to have it pop up as the foreground app every 15 minutes to prevent me from forgetting to stop/change the timer after I've moved on to a different task. I know I can have the app launch using a script in Automator or AppleScript, but I don't know how to have that script fire off every 15 minutes. I've read about using Launchd and iCal, but I'm still not sure how to do it. (Actually, iCal is probably simple, but I'd like to avoid using it for this.) Any ideas? Also, a further feature would be to have it pop up after 5 (or x) minutes of inactivity on the computer. Not sure if this would work for my needs, but I'd like to test it if possible.

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