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• Why can't there be an "ultimate" programming language? [closed]

  - by sub

  There is an uncountable sum of programming languages out there. They obviously all have their pro's and con's - but why can't there be one to "beat them all"? The main part of a programming language is it's syntax and what's possible with it. The rest are usually only a bunch of libraries, frameworks and extensions wrapped around it. So couldn't you combine all the great aspects and experiences gained from the thousands of programming languages out there to build one with a syntax that fits every task? Wouldn't it be better having only one programming language? I see only problems with the current amount of the ones in use. Why can't there be a perfect language when thinking of syntax, constructs and typing?

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• CodeIgnitor is generating multiple sessions in the database, why?

  - by Derrick

  Ive got a site that does a few ajax calls on page load, now for some reason, codeIgnitor is inserting 4 sessions (I'm assuming for each ajax call) as you load the page. I'm storing the sessions in the database. I'm pretty sure there should only be one session per browser? FF seems to only generate one, other browsers seem to create a whole bunch of sessions. Multiple sessions for the same user are giving me some serious authentication problems. any ideas?

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• Error using \Glsentrytext{} in section title.

  - by amicitas

  When using the glossaries package in a LaTeX document I occasionally want to use a glossary entry as part of section or chapter title. For example: \section{\Glsentrytext{big}} This however results in an error. Trying to use \protect\Glsentrytext{} does not solve the the problem. Note that using the non-capitalized version (\glsentrytext) does not produce any problems. Does anyone know of a way to get this to work? I use the glossaries package occasionally as way to format specific strings in a consistent way. For example \gls{big} turns into 'beam-into-gas'. Obviously I could create two glossary entries, with and without caps, to achieve this and only include one in the final glossary. That is an ugly solution though.

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• mCrypt not present after Ubuntu upgrade to 13.10

  - by VukBG

  After I have upgraded my system from Ubuntu 13.04 to 13.10 several problems have occurred with apache, mysql and php configurations. I solved most of them but I can't seem to get mCrypt library working. Package is installed so i don't need to apt-get it. Server works and everything seems fine, but when I try to run php artisan serve with Laravel 4, I get a message that mCrypt is required. I did php --ri mcrypt and the output was Extension 'mcrypt' not present. I have tried putting extension=mcrypt.so to /etc/php5/apache2/php.ini but it didn't worked. Any ideas?

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• How to remove $ from associate array using Json_decode in php?

  - by Chase

  I am trying to use the youtube API to pulldown some videos for my site. Currently am running this code here: //Youtube Videos Pull Down $youtubeURL = "http://gdata.youtube.com/feeds/api/videos?alt=json&q=cats+cradle+chapel+hill&orderby=published&max-results=10&v=2"; $youtubeSearch = file_get_contents($youtubeURL, true); $youtubeArray = json_decode($youtubeSearch, true); Not having any problems accessing certain elements of the associative array however youtube's api is putting $ in many of its array elements .. such as [media$group] Anytime I try to access an array with one of the $ elements in it, it doesn't work. Suggestions? I have tried preg_replace but can't seem to get my expression right.

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• Regex to validate for Unique Well Identifier in rails

  - by Jasper502

  I am a regex newbie and can't seem to figure this one out. Here is a link to the required string formats: http://earth.gov.bc.ca/royp-bin/phcgi.exe?PH_QKC=DOCUWI&PH_APP=RMSprodApp&PH_HTML=DOCUWI.htm For example: 100041506421W500 = 1+0+{01-16}+{01-36}+{001-129}+{01-36}+W+{1-6}+0+{0-9} I tried this: ^10[0|2-9]{1}0*([1-9]|1[0-6])0*([1-9]|[12][0-9]|3[0-6])0*([1-9][0-9]|1[0-2][0-9])0*([1-9]|[12][0-9]|3[0-6])W[1-6]0[0-9]$ In a regex validator and it sort of works except that 1041506421W500 and 10000000041506421W500 validates. The entire string can only be 16 characters long. I am pretty sure I am missing something obvious here regarding the leading zeros. Tried the NTS format and running into the same sort of problems.

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• Confusion with cookie session token and oauth2.0 don't know where to go anymore

  - by byte_slave

  Hi guys, I'm completely confused, frustrated and nothing seems to make sense and work any more. I' dev some iframe fb app and i've been using the javascript sdk (FB.Init()) to get the access_token, but doesn't always work, sometimes i'm already logged into FB and doesn't works... Did some reading, and read also that there is problems using cookies in iframes in Opera and IE, so I was thinking in use the OAuth 2.0 but i'm not sure how via facebook sdk c# and now I'm now completely lost, don't know if i still need to use the javascript FB.Init(). Documentation out there is poor and unclear, a lot of stuff refers to old code, and after hours of reading, jumping on examples, i'm completely messed up and confused. Can some, please, point/explain/enlightening me about this? Thanks a lot guys, appreciated! Merry christmas!

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• Maven easyb plugin java heap space settings?

  - by vinnu

  Hi, I attempted to change my heap size for maven easyb plugin http://www.easyb.org/maven-easyb-plugin/. In my easyb test I added standard code to print the heap size using the code Runtime.getFreeMemory() and Runtime.getTotalMemory(). I tried setting the MAVEN_OPTS=-Xmx1024m -Xms1024m and also set the maven opts in Maven surefire plugin. Now when I run the same class from the Junit I can see the getTotalMemory() displaying a number close 1Gig but the when the same classes are invoked from easyb plugin they do not reflect the memory size. Shouldn't there be a way of passing JVM opts to maven easyb plugin when it runs these easyb tests? At the very minimum it should atleast pick up the MAVEN_OPTS settings from the environment. Has someone bumped into problems like this? (A search on this group's archive does not reveal much)

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• Import orders file on magento enterprise 1.7 (product with customs options)

  - by wil

  Hello, We need to import some orders file on magento enterprise. In our file, products contains customs Options. We tried to make an extension but we have some problems to import Customs options. The import of standard product is successful but not for the product with customs options. For customs option, missing "info_buyRequest" valu in database. The technical support of magento we responded "the import process currently can't handle importing products with custom options". Magento use custom options when ordering a product with customs options on website. What features do magento use to fill in the fields "info_buyRequest" and "Product_options" when ordering? Have you see a extension pack for import file order with product contains customs options? Thanks for your help.

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• non-scalar type requested

  - by lego69

  can somebody please help me with an error conversion from `A' to non-scalar type `B' requested I have class A and derived from it B, but I have problems with these rows: A a(1); A *pb = new B(a); B b = *pb; //here I have an error thanks in advance for any help class A { protected: int player; public: A(int initPlayer = 0); A(const A&); A& operator=(const A&); virtual ~A(){}; virtual void foo(); void foo() const; operator int(); }; class B: public A { public: B(int initPlayer): A(initPlayer){}; ~B(){}; virtual void foo(); };

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• How to Get SharePoint PowerShell to use .NET 2

  - by EoRaptor013

  I'm having a couple of problems with PowerShell. First, the PS configuration installed by SharePoint 2010 keeps popping this message: The local farm is not accessible. Cmdlets with FeatureDependencyId are not registered. I've googled that, and given everybody and their second cousin Sharepoint_Shell_Access to the config DB, with no luck. So, I wanted to try some of the PS commands. In this case, however, I'm getting a different error: Microsoft SharePoint is not supported with version 4.0.30319.17929 of the Microsoft .Net Runtime. I get that SP can't use .NET 4.0 or 4.5, but I can't find any suggestions on how to get PS to use the "right" version of .NET. I've found some references for something called PowerGUI, and changing the psgui.exe.config, but I don't have that. Does anybody have any suggestions on how to solve the .NET version problem? Thanks.

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• 3-Way sorting in ultragrid

  - by M_Mogharrabi

  how can i have a ultragrid with 3-way sorting on every columns? I mean : a. Ascendiing -Indicated by default ascending SortIndicator. b. Descending- Indicated by default descending SortIndicator. c. No Sort- UnSort the column. Note: I have tried BeforeSortChanged Event but i had 2 problems: I could not get the previous column sort indicator to find out when should i disable sorting. I have got an Exception where it is saying that we can't change SortIndicator in BeforeSortChange Event

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• Python BeautifulSoup Print Info in CSV

  - by Codin

  I can print the information I am pulling from a site with no problem. But when I try to place the street names in one column and the zipcodes into another column into a CSV file that is when I run into problems. All I get in the CSV is the two column names and every thing in its own column across the page. Here is my code. Also I am using Python 2.7.5 and Beautiful soup 4 from bs4 import BeautifulSoup import csv import urllib2 url="http://www.conakat.com/states/ohio/cities/defiance/road_maps/" page=urllib2.urlopen(url) soup = BeautifulSoup(page.read()) f = csv.writer(open("Defiance Steets1.csv", "w")) f.writerow(["Name", "ZipCodes"]) # Write column headers as the first line links = soup.find_all(['i','a']) for link in links: names = link.contents[0] print unicode(names) f.writerow(names)

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• How to hash and check for equality of objects with circular references

  - by mfya

  I have a cyclic graph-like structure that is represented by Node objects. A Node is either a scalar value (leaf) or a list of n=1 Nodes (inner node). Because of the possible circular references, I cannot simply use a recursive HashCode() function, that combines the HashCode() of all child nodes: It would end up in an infinite recursion. While the HashCode() part seems at least to be doable by flagging and ignoring already visited nodes, I'm having some troubles to think of a working and efficient algorithm for Equals(). To my surprise I did not find any useful information about this, but I'm sure many smart people have thought about good ways to solve these problems...right? Example (python): A = [ 1, 2, None ]; A[2] = A B = [ 1, 2, None ]; B[2] = B A is equal to B, because it represents exactly the same graph. BTW. This question is not targeted to any specific language, but implementing hashCode() and equals() for the described Node object in Java would be a good practical example.

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• Why isn't my IO executed in order?

  - by HaskellElephant

  Hi, I'm having some fun learning about the haskell IO. However in my recent exploration of it I have encountered some problems with IO not executing in order, even inside a do construct. In the following code I am just keeping track of what cards are left, where the card is a tuple of chars (one for suit and one for value) then the user is continously asked for wich cards have been played. I want the putStr to be executed between each input, and not at the very end like it is now. module Main where main = doLoop cards doLoop xs = do putStr $ show xs s <- getChar n <- getChar doLoop $ remove (s,n) xs suits = "SCDH" vals = "A23456789JQK" cards = [(s,n) | s <- suits, n <- vals] type Card = (Char,Char) remove :: Card -> [Card] -> [Card] remove card xs = filter (/= card) xs

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• Getting list of all existing vtables.

  - by Patrick

  In my application I have quite some void-pointers (this is because of historical reasons, application was originally written in pure C). In one of my modules I know that the void-pointers points to instances of classes that could inherit from a known base class, but I cannot be 100% sure of it. Therefore, doing a dynamic_cast on the void-pointer might give problems. Possibly, the void-pointer even points to a plain-struct (so no vptr in the struct). I would like to investigate the first 4 bytes of the memory the void-pointer is pointing to, to see if this is the address of the valid vtable. I know this is platform, maybe even compiler-version-specific, but it could help me in moving the application forward, and getting rid of all the void-pointers over a limited time period (let's say 3 years). Is there a way to get a list of all vtables in the application, or a way to check whether a pointer points to a valid vtable, and whether that instance pointing to the vtable inherits from a known base class?

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• Is there a pre-made Continuous Integration solution for .NET applications?

  - by Brett Rigby

  From my perspective, we're constructing our own 'flavour' of NAnt/Ivy/CruiseControl.Net in-house and can't help but get the feeling that other dev shops are doing exactly the same work, but then everybody is finding out the same problems and pitfalls with it. I'm not complaining about NAnt, Ivy or CruiseControl at all, as they've been brilliant in helping our team of developers become more sure of the quality of their code, but it just seems strange that these tools are very popular, yet we're all re-inventing the CI-wheel. Is there a pre-made solution for building .Net applications, using the tools mentioned above?

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• Can't download file in IE7 but there isn't any problem in Firefox, Chrome, etc..?

  - by levhita

  I have an script that receives an encrypted url and from that generates a download, the most critic par of the script is this: $MimeType = new MimeType(); $mimetype = $MimeType->getType($filename); $basename = basename($filename); header("Content-type: $mimetype"); header("Content-Disposition: attachment; filename=\"$basename\""); header('Content-Length: '. filesize($filename)); if ( @readfile($filename)===false ) { header("HTTP/1.0 500 Internal Server Error"); loadErrorPage('500'); } Downloads works as charm in any Browser except IE, I have seen problems related to 'no-cache' headers but I don't send anything like that, they talk about utf-8 characters, but there is not any utf-8 characters(and the $filename has not any utf-8 characteres neither).

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• How do I set ORDER BY params using prepared PDO statement?

  - by Marlorn

  I'm having problems using params in the ORDER BY section of my SQL. It doesn't issue any warnings, but prints out nothing. $order = 'columnName'; $direction = 'ASC'; $stmt = $db->prepare("SELECT field from table WHERE column = :my_param ORDER BY :order :direction"); $stmt->bindParam(':my_param', $is_live, PDO::PARAM_STR); $stmt->bindParam(':order', $order, PDO::PARAM_STR); $stmt->bindParam(':direction', $direction, PDO::PARAM_STR); $stmt->execute(); The :my_param works, but not :order or :direction. Is it not being internally escaped correctly? Am I stuck inserting it directly in the SQL? Like so: $order = 'columnName'; $direction = 'ASC'; $stmt = $db->prepare("SELECT * from table WHERE is_live = :is_live ORDER BY $order $direction"); Is there a PDO::PARAM_COLUMN_NAME constant or some equivalent? Thanks!

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• Struts2 plugins - Dojo or jQuery or...?

  - by Trick

  Since Apache Struts has deprecated Dojo plugin from Struts 2.1.x I am thinking to change everything to jQuery. I especially noticed the difference in sizes (170kb vs 19kb - something like that). I had troubles with IE browser with handling dojo scripts, is this happening also with jQuery (when user is working with the application for a long time, script stops running)? I have a lot of dojo tags in my applications, and I use most of theirs attributes. Has anyone had any experience doing that? What were the problems? What were the benefits? Downsides? Does anyone has any better ideas of which plugin to include with Struts2? Any answer will be great! Thanks.

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• What was the thinking behind the development of Object Oriented Programming?

  - by leeand00

  I've got some real nay-sayers on my hands here, and I'm trying to give them the reason why OOP was developed in the first place. I realize that OOP is not perfect for all problems and situations, but it was developed for a reason... My guess would be, that a few of those reasons would be: Maintainability Re-usability Document-ability Abstraction of Complex Technologies Dynamic Extension at Runtime... Probably some things that I'm not even aware of yet... But I really don't have much to back this up, and I was wondering why OOP was developed in the first place, and it's history. What were the people who developed OOP trying to accomplish? What led them to develop OOP?

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• Does this simple cache class need thread synchronization?

  - by DayOne

  Does this simple cache class need thread synchronization ... if I remove the lock _syncLock statement will encounter any problems? I think i can remove the locks as the references should be updated correctly right? ... BUt i'm think whar happens if client code is iterating over the GetMyDataStructure method and it get replaced? Thanks! public sealed class Cache { private readonly object _syncLock = new object(); private IDictionary<int, MyDataStructure> _cache; public Cache() { Refresh(); } public void Refresh() { lock (_syncLock) { _cache = DAL.GetMyDataStructure(); } } public IDictionary<int, MyDataStructure> **GetMyDataStructure**() { lock (_syncLock) { return _cache; } } }

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• How can I speed up Netbeans Task Marker resolution?

  - by Stephen

  I'm trying to quickly navigate and fix problems in code in Netbeans, and it just takes too long. I'll fix a problem, and it will take seconds to re-compile. While this is happening, the marker remains, and all the others that depend on it will too (requiring multiple next-marker key strokes to get to a "new" problem). If I'm doing a fix that changes the number of lines (e.g. organise imports), the markers will navigate to the wrong place, even though the correct text is underlined. Is there a way to speed this up? I presume it's because it's doing a full file compilation via javac to calculate the markers. BUT the information is available in netbeans, because the correct text is underlined, even when the compilation occurs.

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• mod_rewrite and relative urls

  - by Davide Gualano

  I'm setting up some simple url rewriting rules using mod_rewrite and a .htacces file, but I've got some problems. If I set up the .htacces this way: Options +FollowSymLinks RewriteEngine On RewriteBase / RewriteRule /index.html /index.php [L] when I call from the browser this url: http://localhost/~dave/mySite/index.html I got a 404 error. Using this .htacces instead Options +FollowSymLinks RewriteEngine On RewriteBase / RewriteRule /index.html http://localhost/~dave/mySite/index.php [L] everything works fine and I get the index.php page I'm expecting. Am I forced to user absolute urls as the target of a rewrite? Is this a Apache configuration problem? I'm using Max OS X 10.6.2 with its standard Apache installation.

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• Grid computing projects similar to NGrid (thread based)

  - by DivdeAndConquer

  Hello there, first time poster. This is a great place for reading about programming problems. I've been looking at some grid computing projects for .Net/Mono and stumbled upon NGrid. NGrid seems really appealing for grid computing because you simply pass threads to it and there is very little modification you have to make to your code. However, I see that NGrid (http://ngrid.sourceforge.net/?page=overview) is still at version 0.7 and hasn't been updated since May 2008. So, I'm wondering if there are any other grid computing projects that use a similar thread-passing architecture and if anyone has had success using NGrid.

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