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• Complex Join - involving date ranges and sum...

  - by calumbrodie

  I have two tables that I need to join... I want to join table1 and table2 on 'id' - however in table two id is not unique. I only want one value returned for table two, and this value represents the sum of a column called 'total_sold' - within a specified date range (say one month).. SELECT ta.id, tb.total_sold as total_sold_this_week FROM table_a as ta LEFT JOIN table_b as tb ON ta.id=tb.id AND tb.date_sold BETWEEN ADDDATE(NOW(),INTERVAL -3 WEEK) AND NOW() this works but does not SUM the rows - only returning one row for each id... how do I get the sum from table b instead of only one row??? Please criticise if format of question could use more work - I can rewrite and provide sample data if required - this is a trivialised version of a much larger problem. -Thanks

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• How do I assign a non-persistent (in-memory) cookie in ASP.NET?

  - by Jørn Schou-Rode

  The following code will send a cookie to the user as part of the response: var cookie = new HttpCookie("theAnswer", "42"); cookie.Expires = DateTime.Now.AddDays(7); Response.Cookies.Add(cookie); The cookie is of the persistent type, which by most browsers will be written to disk and used across sessions. That is, the cookie is still on the client's PC tomorrow, even if the browser and the PC has been closed in between. After a week, the cookie will be deleted (due to line #2). Non-persistent/in-memory cookies are another bread of cookies, which have a lifespan determined by the duration of the client's browsing session. Usually, such cookies are held in memory, and they are discarded when the browser is closed. How do I assign an in-memory cookie from ASP.NET?

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• CAN Controller DLL with Java Application. Unable to open CAN port.

  - by Joseph Lim

  I am creating a Java application that controls a Controller Area Network (CAN) controller via a vendor-supplied can.dll file. can.dll contains a function bool openPort(DWORD memAddr) that allows the application to establish connection with the CAN controller. I wrote a C++ test application, loaded can.dll via LoadLibrary and found this function to be working as it should, i.e. it returns true. However, in my Java application, calling this via JNI or JNA returns false. I hope someone can help me with this problem as I have been trying to fix this problem for more than a week. Thanks :) JL

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• how to show a html webpage in a GUI in Java

  - by Robert

  Dear all, I've recently worked on a project on search query,and I am only last step away from completion. Now I have a nice URL,and can open it in "cmd /c start" statement in Java,and it causes an IE window open. However,my advisor is not satisfied with that,he wants to see this webpage(actually,two webpages) opened in a GUI interface. So could you please give a detailed instruction on how to achieve this in Java,please?If you are trying to offer me a helpful package,would you please kindly also show how to use that as well,since I am new to this GUI development,and I only know the basics of Swing. Thanks a lot,it is dued within this week.

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• Push origin master error on new repository.

  - by thaiyoshi

  I just started using git with github. I followed their instructions and ran into errors on the last step. I'm checking in an existing directory that isn't currently source-controlled (project about a week old). Other than that, my use case should be pretty run of the mill. Here's what's happening: $ git push origin master error: src refspec master does not match any. fatal: The remote end hung up unexpectedly error: failed to push some refs to '[email protected]:{username}/{projectname}.git' Github's instructions: Global setup: Download and install Git git config --global user.name "Your Name" git config --global user.email {username}@gmail.com Next steps: mkdir projectname cd projectname git init touch README git add README git commit -m 'first commit' git remote add origin [email protected]:{username}/{projectname}.git git push origin master

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• create own svn repository hosting

  - by netmajor

  Hey, Since week I use ToirtoiseSVN and AnkhSVN and GoogleCode and sourceforge.net as my project hosting. For me it's frustrating to fill all this forms before create next project. So I start thinking about mu own repository hosting... Can I use simple file hosting etc. and install there software like use Google or SourceForge to have my own SVN Server ? My point is to have independent repository in internet without all this uselessly UI interface which give me Google and SF to administrate my version control. I don't want to take advantage of already exist hosting like GoogleCode etc - I want to be independent from them! ;) Or maybe it's other way to do my own repository hosting and FREE ;) Please don't tell me that I'm at mercy of commercial hosting... :/ p.s. If I wrote something wrong, sorry ;)

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• Structuring System Architecture in a Flex Web Application on a Budget (w/o Java)

  - by phwd

  I started a project a while back using the following architecture from Adobe Developer Article talking about Creating marketing platforms in Flex. I did my first set of coding locally forgetting that my server did not handle Tomcat. So I said okay, and cut some corners and then some other limitation came up and I cut some more corners. Eventually for a good week or two, it was trying to get the project working with making the ends meet. Layers started to merge. In the end I used a PureMVC (Presentation/Client) - ZendAMF (Communication) - MySql (Data) Layout. It worked but I never felt as though I had some layer just to take care of all the SQL calls to the data.It just felt hacked together So should I keep the above setup and just start from the presentation layer and move downwards like they said in the article or is there a better layering (based on a hosting plan that does not handle Java) I could accomplish ? NOTE: I would just ask the adobe guys but they barely reply on their site. Thanks !

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• How to limit the wordpress tagcloud by date?

  - by Nordin

  Hello, I've been searching for quite a while now to find a way to limit wordpress tags by date and order them by the amount of times they appeared in the selected timeframe. But I've been rather unsuccesful. What I'm trying to achieve is something like the trending topics on Twitter. But in this case, 'trending tags'. By default the wordpress tagcloud displays the most popular tags of all time. Which makes no sense in my case, since I want to track current trends. Ideally it would be something like: Most popular tags of today Obama (18 mentions) New York (15 mentions) Iron Man (11 mentions) Robin Hood (7 mentions) And then multiplied for 'most popular this week' and 'most popular this month'. Does anyone know of a way to achieve this?

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• Preventing spam bots on site?

  - by Mike

  We're having an issue on one of our fairly large websites with spam bots. It appears the bots are creating user accounts and then posting journal entries which lead to various spam links. It appears they are bypassing our captcha somehow -- either it's been cracked or they're using another method to create accounts. We're looking to do email activation for the accounts, but we're about a week away from implementing such changes (due to busy schedules). However, I don't feel like this will be enough if they're using an SQL exploit somewhere on the site and doing the whole cross site scripting thing. So my question to you: If they are using some kind of XSS exploit, how can I find it? I'm securing statements where I can but, again, its a fairly large site and it'd take me awhile to actively clean up SQL statements to prevent XSS. Can you recommend anything to help our situation?

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• iPhone expired dev certs - public/private key pair issue

  - by KevinDTimm

  My dev 'license' expired last week, and with it my dev certs. I re-upped my license, but my keys are still expired. I tried to create a new signing certificate via keychain, etc. but it seems my private key is not enough, it needs my public key to do so. I understand that the public key is stored in the provisioning certificate. The question is, can I retrieve the public key from there? (And if so, how?)

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• Best programming novel to take on holiday

  - by Ed Guiness

  I am about enjoy a two week break in Spain where I expect to have lots of time for relaxing and reading. I normally read a lot of non-fiction so I'm looking for novel suggestions. If there is another Cryptonomicon out there I'd love to hear about it! UPDATE: In the end I took four books including Quicksilver. Quicksilver was fantastic and I look forward to continuing the series. I was disappointed with Gen X (Coupland) and Pattern Recognition (Gibson). Upon arrival I also found The Monsters Of Gramercy Park (Leigh) which was enjoyable though sad. Thanks for all the recommendations, I'm sure to return to this list when I have more free time.

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• What's the smartest way to organize SVN for translated versions of the same project?

  - by brandonjp

  I apologize because I know this has been covered over and over again, but I'm trying to understand the smartest way to cleverly use subversion to our benefit. (*Note: I know our method is not the BEST way to handle localized versions, but external factors are forcing us to work this way on current projects) We have a fairly static website in English...html, css, js, etc. After the site comes back from the translator we will have 5 variations of the same code (this week...then potentially 25 more in the future!). So we'll soon have a folder for EN, FR, SP, DE, etc. Most files (css, js, img) will remain exactly the same; and html files (structure, id's, classes) will only vary based on the localized text inside the elements. Is there any way to use clever SVN folder structuring that would help us out in the event that if a small change is needed, we don't have to manually change the files in each and every translated version of the site? Thanks! --bp

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• Anyone realize success using Apple Mac OS 10.6 and Parallels 5 for a Visual Studio Dev machine?

  - by Buffalo

  Greetings my wonderful StackOverflow family :) I grew up using Windows and switched to OSX as a Computer Science major in College. I've recently started my first real software developer job, and have a ThinkPad and Windows XP for developing ASP.NET / MS SQL applications (Visual Studio 2008). Question: Basically, I am wondering if any developers out there have had real success creating ASP.NET applications on a Mac using a VM? I've been fighting with Parallels 5 all week and finally have Windows 7 and VS 2008 running but my hot-keys are all screwed up. Is it worth the work to keep beating this thing into submission? Should I give up? Should I give Mono a try instead? Thanks Folks, I can't wait to see what you all think!

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• Would Mercurial help me work from 2 PCs?

  - by rikh

  I currently use Perforce for source control, but want to start working on the code from 2 different PCs at the same time (desktop and laptop). The laptop would not be able to access the perforce server very often, which makes Perforce a poor choice in this setup. Distributed source control tools like Mercurial seem better suited to the task, but I am still not clear if this would work or not. Does anyone have any experience of using Mercurial to work on 2 machines at once (eg desktop in the week, laptop in evening and weekends). Does it help, or is it still a pain the butt keeping everything in sync and knowing what is going on.

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• Essential Training Topics for Supervisors of ASP.NET Developers

  - by Dave Johnson

  I have a co-worker who supervises a group of ASP.NET developers who are doing lots of ASP.NET/SQL Server apps. My co-worker was very technical at one time, but his last programming assignment was writing Fortran code in the 1980s. He has asked me to help him gain a deeper knowledge of ASP.NET Web application development to equip him in his supervisory role. I will be spending an hour every other week with him providing training, and he will probably not have a lot of time to commit otherwise. What would you recommend as topics to cover, tutorial resources, etc. so that I can help him get up to speed in his role as a supervisor of ASP.NET developers?

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• What is a good way to sync code files between computer?

  - by erotsppa

  I have a need to code from two computers during the week. What is the best way to sync the two computers (mac)? I've started using source control, like SVN. It works pretty good, except sometimes I check in code that I want to sync but they don't compile and it interferes with other people on the team working on the same project. I don't want to use branch. It wouldn't make sense to branch every night when I head home from office.

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• MySQL ALTER TABLE on very large table - is it safe to run it?

  - by Timothy Mifsud

  I have a MySQL database with one particular MyISAM table of above 4 million rows. I update this table about once a week with about 2000 new rows. After updating, I then perform the following statement: ALTER TABLE x ORDER BY PK DESC i.e. I order the table in question by the primary key field in descending order. This has not given me any problems on my development machine (Windows with 3GB memory), but, even though 3 times I have tried it successfully on the production Linux server (with 512MB RAM - and achieving the resulted sorted table in about 6 minutes each time), the last time I tried it I had to stop the query after about 30 minutes and rebuild the database from a backup. I have started to wonder whether a 512MB server can cope with that statement (on such a large table) as I have read that a temporary table is created to perform the ALTER TABLE command?! And, if it can be safely run, what should be the expected time for the alteration of the table? Thanks in advance, Tim

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• mod_rewrite different rules for different pages

  - by Sophia Gavish

  Hi, I'm trying to understand how mod_rewrite works. I've been using it before but this week I tried to write rules to a new website and it doesn't works. I want to make a rule to make : www.example.com/media/?gallery=galleryname&album=albumname&pid=pictureid looks like: www.example.com/media/galleryname/albumname/pictureid The rule is: RewriteRule ^([^/])/([^/])/([^/]*)$ /media/?gallery=$1&album=$2&pid=$3 [L] and here is the code below: Options -Indexes Options +FollowSymLinks RewriteEngine on RewriteBase / RewriteCond %{REQUEST_METHOD} !^(TRACE|TRACK|GET|POST|HEAD)$ RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME} !-l RewriteRule ^([^/])/([^/])/([^/]*)$ /media/?gallery=$1&album=$2&pid=$3 [L] I really want to know what I'm missing, because I tried some examples and it looks fine to me. maybe because /media/ is an actual folder the rule is wrong? Thanks.

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• SQL Server 2000 DTS Package Failing with "The number of failing rows exceeds the maximum specified"

  - by Scott McCormick

  I have inherited a SQL Server 2000 DTS package that migrates data from SQL Server to Oracle. This package moves about 20 tables' data to Oracle every night with no transformations, and it is then transformed by a set of SPs and used by a GIS application. Twice this week, during the migration between SQL Server and Oracle, the package has failed with "The number of failing rows exceeds the maximum specified". It has failed on a different table each time, though. Each time it's failed, we've rerun the process the next morning and it has worked. Because the process works the second time it's run, it makes me think the data is being changed by someone or something between the initial failure and our successful second run. I would like to change the DTS package to log the failing rows in a text document so we can compare them later. Can someone help me with that? I can't seem to figure that part out. Scott

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• Variable width columns in a table

  - by Jack

  I'm using an HTML table for a calendar and I want to fill the cells with various events from my database. Usually they will land on weekends but some will run for long weekend, bank holidays or even the odd week day. How can I get my tables columns to expand and shrink accordingly. I'd like to avoid the use of javascript if possible. If this can't be done I'm going to need a tutorial to help me get my head around how to make div's positioning behave. cheers

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• Is there a way to programmatically extract the feed of a podcast from the iTunes page?

  - by J. Pablo Fernández

  From an iTunes page, like http://itunes.apple.com/us/podcast/this-week-in-tech-mp3-edition/id73329404, is there a way to extract the corresponding feed address? In this case it would be http://leoville.tv/podcasts/twit.xml. I know that if you open on iTunes you can extract it manually, but I want to do it programmatically. There's a link to the website of the podcast, but it may not be accurate. In this case it points to a web site with 20 podcasts on it.

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• java.lang.UnsupportedClassVersionError in eclipse

  - by Derek

  Hi all, I am not a Java programmer really, so I am posting this question. The exception is being thrown java.lang.UnsupportedClassVersionError in my main class in an eclipse project. If I comment out the imports that this class has, it compiles and runs fine. If I put the imports back in, it does not work. Does this mean that the libraries I am importing were compiled with a newer or older version of java than I have? when i do java -version on the system i get 1.5_07 I could've sworn this was actually working last week, but maybe some setting in eclipse got tweaked? Is the Java Build Path in eclipse what I need to look for to check the JRE and compiler versions?

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• Uncaught TypeError: Converting circular structure to JSON

  - by ychia

  We're using the fb:registration plugin to sign up users on our site. Today I noticed the registration redirect is no longer working in Google Chrome and Safari (latest public release). I know for sure it was working with the same code as recently as last week. It seems to be getting stuck on submission with this error, which is coming from: static.ak.fbcdn.net/rsrc.php/v1/ys/r/ioE9qOq_5Oa.js:101 Firefox and IE have no problem, so it seems to be Webkit specific. Any ideas?

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• What are some best practices for making sure your .NET code will scale well?

  - by billmaya

  Last week I interviewed for a position at a TripleA MMORPG game company here in NE. I didn't get the job but one of the areas that came up during the interview was the about the scalability of the code that you write and how it should be considered early on in the design of your architecture and classes. Sadly to say I've never thought very much about the scalability of the .NET code that I've written (I work with single user desktop and mobile applications and our major concerns are usually with device memory and rates of data transmission). I'm interested in learning more about writing code that scales up well so it can handle a wide range of remote users in a client server environment, specifically MMORPGs. Are there any books, web sites, best practices, etc. that could get me started researching this topic?

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• Java Scheduling Calendar

  - by cedric

  Hi. I have a j2ee web application which supports scheduling of execution of jobs. I am looking for a free calendar component written in java which allows scheduling functionalities as well as capable of changing view mode of tasks either by viewing taks for whole year, month view, week view, day view. Do you have any suggestion. Im sorry something came up with the implementation. I dnt have to use this calendar for triggering or calling jobs. I just need to retrieve schedules from database and display it in diff view modes. SO it's just some kind of GUI functionality

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