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Articles indexed Saturday April 10 2010

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  • [PHP]RegEx help with a string

    - by Uffo
    So I have a random of strings and I need to parse them, let's take an example: This string - DeleteMe please and some other text So I want to find DDeleteMe please and some other text and remove it, because all I need is This string Best Regards,

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  • Access Violation Using memcpy or Assignment to an Array in a Struct

    - by Synetech inc.
    Hi, I wrote a program last night that worked just fine but when I refactored it today to make it more extensible, I ended up with a problem. The original version had a hard-coded array of bytes. After some processing, some bytes were written into the array and then some more processing was done. To avoid hard-coding the pattern, I put the array in a structure so that I could add some related data and create an array of them. However now, I cannot write to the array in the structure. Here’s a pseudo-code example: main() { char pattern[]="\x32\x33\x12\x13\xba\xbb"; PrintData(pattern); pattern[2]='\x65'; PrintData(pattern); } That one works but this one does not: struct ENTRY { char* pattern; int somenum; }; main() { ENTRY Entries[] = { {"\x32\x33\x12\x13\xba\xbb\x9a\xbc", 44} , {"\x12\x34\x56\x78", 555} }; PrintData(Entries[0].pattern); Entries[0].pattern[2]='\x65'; //0xC0000005 exception!!! :( PrintData(Entries[0].pattern); } The second version causes an access violation exception on the assignment. I’m sure it’s because the second version allocates memory differently, but I’m starting to get a headache trying to figure out what’s what or how to get fix this. (I’m currently working around it by dynamically allocating a buffer of the same size as the pattern array, copying the pattern to the new buffer, making the changes to the buffer, using the buffer in the place of the pattern array, and then trying to remember to free the—temporary—buffer.) (Specifically, the original version cast the pattern array—+offset—to a DWORD* and assigned a DWORD constant to it to overwrite the four target bytes. The new version cannot do that since the length of the source is unknown—may not be four bytes—so it uses memcpy instead. I’ve checked and re-checked and have made sure that the pointers to memcpy are correct, but I still get an access violation. I use memcpy instead of str(n)cpy because I am using plain chars (as an array of bytes), not Unicode chars and ignoring the null-terminator. Using an assignment as above causes the same problem.) Any ideas? Thanks a lot.

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  • MSBuild target _CopyWebApplication does not copy all necessary files to the bin folder

    - by apollodude217
    Elsewhere on the Web, you can find recommendations on using something like this to simulate the Publish feature in the VS 2005-2008 IDE from a command-line (I hope I did not goof up the syntax!): msbuild /t:ResolveReferences;_CopyWebApplication /p:BuildingProject=true;OutDir=C:\inetpub\wwwroot\ blah.csproj Now, it looks like the .dll's copy fine. However, there are certain configuration files and template files that are copied to the bin folder which are needed for the app to work. For example, an NHibernate configuration file shows up in blah.csproj as: <None Include="blah.cfg.xml"> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> </None> While using Publish from within the IDE copies this file as it should, the aforementioned _CopyWebApplication target does not. I need this file to be copied in the build script. Is this desired behavior for _CopyWebApplication? Any recommendations on how to fix this?

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  • Is there a codeigniter api reference?

    - by ajsie
    whenever using a framework it's so good with a api reference so you could lookup the classes' methods and properties, which class they extend from and so on. is there a api reference for codeigniter similar to yii's excellent api referenc? http://www.yiiframework.com/doc/api/ how else could you know more about the details about the classes if there isn't a good api reference. java's api reference is also great: http://java.sun.com/j2se/1.4.2/docs/api/ why can't i find codeigniter's. thanks.

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  • Visual Studio 2010 Launch April 12 Las Vegas

    - by Dave Campbell
    I'm going to be in 'Vegas for the Launch on Monday, I'm not sure what time I'm getting in on Sunday, but I'm staying over Monday night as well, so if you're going to be around in that time-frame, send me an email! Bummer to not be there for Silverlight on Tuesday, but hey... watching Scott Guthrie is always worth the drive :)

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  • Envista: Coordinating Utilities with Oracle Spatial 11g

    - by stephen.garth
    It's annoying when the same streets seem to be perpetually dug up for utility construction or maintenance by your water or sewer department, electric utility, gas company or telephone company. Can't they do a better job of coordinating these activities? In this podcast, Marc Fagan, Executive VP of Product Management from Envista describes a Software-as-a-Service solution that Envista provides for utilities and public works departments to coordinate upcoming construction work, using Oracle Database 11g with Oracle Spatial. Each participating utility enters key data into the Web-based application, including when and where their work is to take place, and who to contact for more information. The data is then available on a common base map, enabling all participants to coordinate their activities, save money, and minimize inconvenience to their customers. Listen to the podcast Find out more about Oracle Spatial 11g var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-13185312-1"); pageTracker._trackPageview(); } catch(err) {}

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  • C++ (And other languages) - Learning from source code examples.

    - by Gabe
    I found that the most effective way for me to learn html and css was to simply find a site, right click, view the source code, and see how it worked. I'm in the process of learning c++ and I think examples/source code to look through would help me a good deal. So, how can I do this? Are there online sites that serve this purpose? Any other recommendations on learning would be great, too.

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  • How to return a MVC View to a $.Ajax JSON POST

    - by flascuba
    I am sending a $.Ajax POST to a MVC Controller function with parameters and returning a JasonResult successfully. What I need to happen is that the current View be returned (as if it was not a JSON request and I was returning the Viewdata). The Viewdata has been updated and the page needs to be redrawn. In short, I want the MVC Action to respond back to the $Ajax request correctly, and then have the page redrawn using the updated Viewdata. Hope this makes sense, coming down with a bad cold.

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  • Is Rails Metal (& Rack) a good way to implement a high traffic web service api?

    - by Greg
    I am working on a very typical web application. The main component of the user experience is a widget that a site owner would install on their front page. Every time their front page loads, the widget talks to our server and displays some of the data that returns. So there are two components to this web application: the front end UI that the site owner uses to configure their widget the back end component that responds to the widget's web api call Previously we had all of this running in PHP. Now we are experimenting with Rails, which is fantastic for #1 (the front end UI). The question is how to do #2, the back serving of widget information, efficiently. Obviously this is much higher load than the front end, since it is called every time the front page loads on one of our clients' websites. I can see two obvious approaches: A. Parallel Stack: Set up a parallel stack that uses something other than rails (e.g. our old PHP-based approach) but accesses the same database as the front end B. Rails Metal: Use Rails Metal/Rack to bypass the Rails routing mechanism, but keep the api call responder within the Rails app My main question: Is Rails/Metal a reasonable approach for something like this? But also... Will the overhead of loading the Rails environment still be too heavy? Is there a way to get even closer to the metal with Rails, bypassing most of the environment? Will Rails/Metal performance approach the perf of a similar task on straight PHP (just looking for ballpark here)? And... Is there a 'C' option that would be much better than both A and B? That is, something before going to the lengths of C code compiled to binary and installed as an nginx or apache module? Thanks in advance for any insights.

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  • Boosting my GA with Neural Networks and/or Reinforcement Learning

    - by AlexT
    As I have mentioned in previous questions I am writing a maze solving application to help me learn about more theoretical CS subjects, after some trouble I've got a Genetic Algorithm working that can evolve a set of rules (handled by boolean values) in order to find a good solution through a maze. That being said, the GA alone is okay, but I'd like to beef it up with a Neural Network, even though I have no real working knowledge of Neural Networks (no formal theoretical CS education). After doing a bit of reading on the subject I found that a Neural Network could be used to train a genome in order to improve results. Let's say I have a genome (group of genes), such as 1 0 0 1 0 1 0 1 0 1 1 1 0 0... How could I use a Neural Network (I'm assuming MLP?) to train and improve my genome? In addition to this as I know nothing about Neural Networks I've been looking into implementing some form of Reinforcement Learning, using my maze matrix (2 dimensional array), although I'm a bit stuck on what the following algorithm wants from me: (from http://people.revoledu.com/kardi/tutorial/ReinforcementLearning/Q-Learning-Algorithm.htm) 1. Set parameter , and environment reward matrix R 2. Initialize matrix Q as zero matrix 3. For each episode: * Select random initial state * Do while not reach goal state o Select one among all possible actions for the current state o Using this possible action, consider to go to the next state o Get maximum Q value of this next state based on all possible actions o Compute o Set the next state as the current state End Do End For The big problem for me is implementing a reward matrix R and what a Q matrix exactly is, and getting the Q value. I use a multi-dimensional array for my maze and enum states for every move. How would this be used in a Q-Learning algorithm? If someone could help out by explaining what I would need to do to implement the following, preferably in Java although C# would be nice too, possibly with some source code examples it'd be appreciated.

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  • What is The Loop Variable After a For Loop in Delphi?

    - by Andreas Rejbrand
    In Delphi, consider var i: integer; begin for i := 0 to N do begin { Code } end; One might think that i = N after the for loop, but does the Delphi compiler guarantee this? Can one make the assumption that the loop variable is equal to its last value inside the loop, after a Delphi if loop? Update After trying a few simple loops, I suspect that i is actually equal to one plus the last value of i inside the loop after the loop... But can you rely on this?

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  • PHP-CGI slowly gains memory despite lack of requests.

    - by Kyle
    I know by now that PHP-CGI will sit there and hog my memory but I'm not looking to reduce it, just a way to reset the processes every so often. I'm using PHP-CGI with FastCGI/Lighttpd. So the best way of saying this is how could I reset these processes to prevent these annoying memory leaks?

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  • dns queries not using nscd for caching

    - by xenoterracide
    I'm trying to use nscd (Nameservices Cache Daemon) to cache dns locally so I can stop using bind to do it. I've gotten it started and ntpd seems to attempt to use it. But everything else for hosts seems to ignore it. e.g if I do dig apache.org 3 times none of them will hit the cache. I'm viewing the cache stats using nscd -g to determine whether it's been used. I've also turned the debug log level up to see if I can see it hitting and the queries don't even hit nscd. nsswitch.conf # Begin /etc/nsswitch.conf passwd: files group: files shadow: files publickey: files hosts: cache files dns networks: files protocols: files services: files ethers: files rpc: files netgroup: files # End /etc/nsswitch.confenter code here nscd.conf # # /etc/nscd.conf # # An example Name Service Cache config file. This file is needed by nscd. # # Legal entries are: # # logfile <file> # debug-level <level> # threads <initial #threads to use> # max-threads <maximum #threads to use> # server-user <user to run server as instead of root> # server-user is ignored if nscd is started with -S parameters # stat-user <user who is allowed to request statistics> # reload-count unlimited|<number> # paranoia <yes|no> # restart-interval <time in seconds> # # enable-cache <service> <yes|no> # positive-time-to-live <service> <time in seconds> # negative-time-to-live <service> <time in seconds> # suggested-size <service> <prime number> # check-files <service> <yes|no> # persistent <service> <yes|no> # shared <service> <yes|no> # max-db-size <service> <number bytes> # auto-propagate <service> <yes|no> # # Currently supported cache names (services): passwd, group, hosts, services # logfile /var/log/nscd.log threads 4 max-threads 32 server-user nobody # stat-user somebody debug-level 9 # reload-count 5 paranoia no # restart-interval 3600 enable-cache passwd yes positive-time-to-live passwd 600 negative-time-to-live passwd 20 suggested-size passwd 211 check-files passwd yes persistent passwd yes shared passwd yes max-db-size passwd 33554432 auto-propagate passwd yes enable-cache group yes positive-time-to-live group 3600 negative-time-to-live group 60 suggested-size group 211 check-files group yes persistent group yes shared group yes max-db-size group 33554432 auto-propagate group yes enable-cache hosts yes positive-time-to-live hosts 3600 negative-time-to-live hosts 20 suggested-size hosts 211 check-files hosts yes persistent hosts yes shared hosts yes max-db-size hosts 33554432 enable-cache services yes positive-time-to-live services 28800 negative-time-to-live services 20 suggested-size services 211 check-files services yes persistent services yes shared services yes max-db-size services 33554432 resolv.conf # Generated by dhcpcd from eth0 nameserver 127.0.0.1 domain westell.com nameserver 192.168.1.1 nameserver 208.67.222.222 nameserver 208.67.220.220 as kind of a side note I'm using archlinux.

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  • Java RMI method synchronization

    - by James Moore
    Hello, I have a class that is stored on the 'server' and multiple clients can call this method. This method returns a class. Now when clients call accessor methods within this class for example a set accessor method. I want the object on the server to be updated and synchronized across all the other clients. How do I use: public synchronized setStatus(String s) { this.status = s; } within java to achieve this. Thanks

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  • insert and modify a record in an entity using Core Data

    - by aminfar
    I tried to find the answer of my question on the internet, but I could not. I have a simple entity in Core data that has a Value attribute (that is integer) and a Date attribute. I want to define two methods in my .m file. First method is the ADD method. It takes two arguments: an integer value (entered by user in UI) and a date (current date by default). and then insert a record into the entity based on the arguments. Second method is like an increment method. It uses the Date as a key to find a record and then increment the integer value of that record. I don't know how to write these methods. (assume that we have an Array Controller for the table in the xib file)

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  • jQuery animate mouseover/mouseout keep drop menu visible

    - by Ce.
    I'm trying to make a basic drop down menu with animate and am running into the issue where I can't seem to figure out how to keep the dropdown part open until the mouse leaves. Is there an easy way to tell this to stay open? I know what I have is completely wrong regarding the .clickme mouseout function since it will unload the menu accordingly. If anyone can help in this specific instance, I would be super grateful. PREVIEW HERE http://cu3ed.com/ddmenu/ or below: $(document).ready(function() { $('.clickme').mouseover(function() { $('#slidebox').animate({ top: '+=160' }, 200, 'easeOutQuad'); }); $('.clickme').mouseout(function(){ $('#slidebox').animate({ top: '-=160' }, 200, 'easeOutQuad') }); }); I would like to keep this as simple and clean as possible. I know the CSS is all crazy but it's totally preliminary. THANKS!!!

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  • Single ErrorDocument directive to catch all errors (.htaccess)

    - by Mike Valeriano
    Hello. Is there something like a wildcard directive to catch all possible errors and deal with them in a single custom error page? ErrorDocument 404 /error.php?code=404 ErrorDocument 403 /error.php?code=403 ... ErrorDocument NNN /error.php?code=NNN #possible use of RegExp? I know I probably won't be dealing with a lot of custom error pages here, but I'm curious about this.

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  • Rails Resque workers fail with PGError: server closed the connection unexpectedly

    - by gc
    I have site running rails application and resque workers running in production mode, on Ubuntu 9.10, Rails 2.3.4, ruby-ee 2010.01, PostgreSQL 8.4.2 Workers constantly raised errors: PGError: server closed the connection unexpectedly. My best guess is that master resque process establishes connection to db (e.g. authlogic does that when use User.acts_as_authentic), while loading rails app classes, and that connection becomes corrupted in fork()ed process (on exit?), so next forked children get kind of broken global ActiveRecord::Base.connection I could reproduce very similar behaviour with this sample code imitating fork/processing in resque worker. (AFAIK, users of libpq recommended to recreate connections in forked process anyway, otherwise it's not safe ) But, the odd thing is that when I use pgbouncer or pgpool-II instead of direct pgsql connection, such errors do not appear. So, the question is where and how should I dig to find out why it is broken for plain connection and is working with connection pools? Or reasonable workaround?

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  • Memory efficient way of inserting an array of objects with Core Data

    - by randombits
    I'm working on a piece of code for an iPhone application that fetches a bunch of data from a server and builds objects from it on the client. It ends up creating roughly 40,000 objects. They aren't displayed to the user, I just need to create instances of NSManagedObject and store them to persistent storage. Am I wrong in thinking that the only way to do this is to create a single object, then save the context? is it best to create the objects all at once, then somehow save them to the context after they're created and stored in some set or array? If so, can one show some example code for how this is done or point me in the direction to code where this is done? The objects themselves are relatively straight forward models with string or integer attributes and don't contain any complex relationships.

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  • How to disable border of WPF button when click it?

    - by Ekkapop
    How to disable border of WPF button when I click it? I have create button like below, everything work fine except when I click on the button. <Button Background="Transparent" BorderBrush="Transparent"> <Button.Content> <StackPanel> <Image Source="xxx.png" /> <TextBlock Text="Change Password" /> </StackPanel> </Button.Content> </Button> When I click the button, it has border like below. I try to create style for FocusVisualStyle of the button but it don't work as I expect, this problem also occur when I set IsDefault="True" too.

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