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• Can immutable be a memory hog?

  - by ciscoheat

  Let's say we have a memory-intensive class like an Image, with chainable methods like Resize() and ConvertTo(). If this class is immutable, won't it take a huge amount of memory when I start doing things like i.Resize(500, 800).Rotate(90).ConvertTo(Gif), compared to a mutable one which modifies itself? How to handle a situation like this in a functional language?

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• Is Ruby on Rails slow with medium traffic?

  - by IHawk

  Hello ! I made some searches on Google, and I read some posts, articles and benchmarks about Ruby on Rails being slow and I am planning to build one website that will have a good amount of users inserting data and there will be some applications to process this data (maybe in Ruby, you can help me choosing the language). What is the real performance of Ruby on Rails with large traffic ? Thank you !

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• NOt able to parse "&"

  - by shishir.bobby

  HI all, my xml consist of words in few different language,latin words etc. i am able to parse these latin characters n all except the fact,that i am not able parse only "&" This is wat i am getting @gdb Entity: line 223: parser error : xmlParseEntityRef: no name Ull always be mine 4 now & 4ever.Ull always be mine 4 u r my treasure.Ull Any hint to overcome this regards shishir

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• F# advantages over conventional programming languages such as C#?

  - by Vishal Seth

  I was wondering if somebody could highlight the advantages of programming in F# in comparison to my regular object-oriented programming language such as C#. PS: Sorry if I sound like a person who just got out of the cave.

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• Is there a way to avoid debugger?

  - by Gabriel Šcerbák

  I don't like debugging in a debugger, because I think it is often below the abstraction layer of the programming language and it is often not reproducible. I favor usign unit tests when possible and I think they are a good way, but it is not always that easy to implement them. Do you know about any other alternative approaches to avoid the use of debugger?

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• Wildcard searching and highlighting with Solr 1.4

  - by andy

  Hey guys, I've got a pretty much vanilla install of SOLR 1.4 apart from a few small config and schema changes. <requestHandler name="standard" class="solr.SearchHandler" default="true"> <!-- default values for query parameters --> <lst name="defaults"> <str name="defType">dismax</str> <str name="echoParams">explicit</str> <str name="qf"> text </str> <str name="spellcheck.dictionary">default</str> <str name="spellcheck.onlyMorePopular">false</str> <str name="spellcheck.extendedResults">false</str> <str name="spellcheck.count">1</str> </lst> </requestHandler> The main field type I'm using for Indexing is this: <fieldType name="textNoHTML" class="solr.TextField" positionIncrementGap="100"> <analyzer type="index"> <charFilter class="solr.HTMLStripCharFilterFactory" /> <tokenizer class="solr.WhitespaceTokenizerFactory"/> <filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt" enablePositionIncrements="true" /> <filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" catenateWords="1" catenateNumbers="1" catenateAll="0" splitOnCaseChange="1"/> <filter class="solr.LowerCaseFilterFactory"/> <filter class="solr.SnowballPorterFilterFactory" language="English" protected="protwords.txt"/> </analyzer> <analyzer type="query"> <tokenizer class="solr.WhitespaceTokenizerFactory"/> <filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt" ignoreCase="true" expand="true"/> <filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt" enablePositionIncrements="true" /> <filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" catenateWords="0" catenateNumbers="0" catenateAll="0" splitOnCaseChange="1"/> <filter class="solr.LowerCaseFilterFactory"/> <filter class="solr.SnowballPorterFilterFactory" language="English" protected="protwords.txt"/> </analyzer> </fieldType> now, when I perform a search using "q=search+term&hl=on" I get highlighting, and nice accurate scores. BUT, for wildcard, I'm assuming you need to use "q.alt"? Is that true? If so my query looks like this: "q.alt=search*&hl=on" When I use the above query, highlighting doesn't work, and all the scores are "1.0". What am I doing wrong? is what I want possible without bypassing some of the really cool SOLR optimizations. cheers!

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• assign subset of parent table to objects in R

  - by Brandon

  Hello, I would like to iterate through a table and break it into relvant parts based on the number of visits. I have tried several things but cannot seem to get it to work. I have included the code. for(i in 1:6){ paste("testing.visit",i,"\n",sep="") <- subset(testing,visit_no==2) } But I get the following error. Error in paste("testing.visit", i, "\n", sep = "") <- subset(testing, : target of assignment expands to non-language object Thank you, Brandon

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• why does vb not support multiple inheritance?

  - by isolatedIterator

  I've seen some discussion on why c# does not implement multiple inheritance but very little as to why it isn't supported in vb. I understand that both c# and vb are compiled down to intermediary language and so they both need to share similar restrictions. The lack of multiple inheritance in VB seems to have been given as one reason for the lack of the feature in dot net. Does anyone know why VB doesn't support multiple inheritance? I'm hoping for a bit of history lesson and discussion on why this was never considered for VB.

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• What is the best beginner's guide to PHP?

  - by Ami

  I work a lot with Wordpress and I'm trying to customize some of my themes, all of which are written in PHP. I've been trying to learn this language for a little while, but I'm not an experienced coder (My knowledge only includes HTML with some CSS). Can you recommend a guide/book/tutorial/etc that would work for a beginner?

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• Google Calendar API Sharing Example

  - by user244870

  Hi Experts, I am looking for examples of share calendar and share event using google calendar API in any programming language java, .net, java script. Thanks, Aqeel

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• What is your experience with Nitrogen on Erlang?

  - by Yuval A

  I've been checking out the Nitrogen Project which is supposed to be the most mature web development framework for Erlang. Erlang, as a language, is extremely impressive. However, with regards to Nitrogen, what I am not too keen about is using Erlang's rather uncommon syntax (unless you're native in PROLOG) to build UIs. What is your experience with it as opposed to other mainstream web frameworks such as Django or Rails?

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• Good practices for a robust FTP script

  - by dutch

  What are the things a script should do to ensure that files have been FTPed correctly? Following are the things I have in mind: 1) use high level scripting language like python or perl instead of shell script for a more comprehensive functionality and error handling 2) check that the file exists at the destination after FTP 3) check destination file size. This is a little bit difficult because file size will change if the source and destination are running different OS. Any tips on how to go about this?

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• List all avilable ResourceBundle Files

  - by shay

  Hello all , i am using ResourceBundle and i want to give the user an option to select a language for the GUI. i want to get a list of all resource files that are under a specific package. i don't know what resource i will have since this application based on plug-ins is there an option to ask from java to search all available resources under a package ? (if no i guess the plug-in should give all available local for it) thank you all

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• How to explain traits?

  - by Partial

  How would you explain traits to a new C++ programmer? How would you explain traits to a C programmer? How would you explain traits to a Java/Ruby/Python/C# or any other OOP language programmer?

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• Programmatically measure size and way-order of L1 and L2 caches

  - by osgx

  How can I measure programmatically (not query the OS, but measure) the size and order of associativity of L1 and L2 caches (data caches)? Assumptions about system: It has L1 and L2 cache (may be L3 too, may be cache sharing), It may have a hardware prefetch unit (just like P4+), It has a stable clocksource (tickcounter or good HPET for gettimeofday). There are no assumptions about OS (it can be Linux, Windows, or something non-standard), and we can't use POSIX queries. Language is C. And compiler optimizations may be disabled.

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• Word XML to RTF conversion

  - by Chathuranga Chandrasekara

  I am in a need of programatically convert an Word-XML file into a RTF file. It has become a requirement, because of some third party libraries. Any API/Library that can do that? Actually the language is not a problem because I just need to work done. But Java, .NET languages or Python are preferred.

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• when was Kase born?

  - by Horace Ho

  First time I saw a class Kase, I was scratching my head. My guess it's something to do with a conflict of the keyboard case. BTW, since when, for which language(S), it becomes a norm?

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• object file in linux

  - by asha

  i have made a firewall project in c language on linux operating system ,now i want to know how to make setup of this project so that i can run this application on other system by installing it ?please give an example........... Thanks in advance

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• object file in linux

  - by asha

  i have made a firewall project in c language on linux operating system ,now i want to know how to make setup of this project so that i can run this application on other system by installing it ?please give an example...........

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• Trouble cross-referencing two XML child nodes in AS3

  - by Dwayne

  I am building a mini language translator out of XML nodes and Actionscript 3. I have my XML ready. It contains a series of nodes with two children in them. Here is a sample: <translations> <entry> <english>man</english> <cockney>geeza</cockney> </entry> <entry> <english>woman</english> <cockney>lily</cockney> </entry> </translations> The AS3 part consist of one input box named "textfield_txt" where the English word will be typed in. An output text field for the translation called "cockney_txt". Finally, one button to execute the translation called "generate_mc". The idea is to have actionscript look through the XML for key English words after the user types it in the "textfield", cross-freferences the children then returns the Cockney translation as a value. The trouble is, when I test it I get no response or error messages- it's completely silent. I'm not sure what I'm doing wrong. At present, I have setup a conditional statement to tell me whether the function works or not. The result is, no it's not! Here's the code below. I hope someone can help. Cheers! generate_mc.buttonMode=true; var English:String; var myXML:XML; var myLoader:URLLoader = new URLLoader(); myLoader.load(new URLRequest("Language.xml")); myLoader.addEventListener(Event.COMPLETE, processXML); function processXML(e:Event):void { myXML = new XML(e.target.data); } generate_mc.addEventListener(MouseEvent.CLICK, onClick); function onClick(event:MouseEvent) { English = textfield.text; cockney_txt.text = myXML.translations.entry.cockney; if(textfield.text.toLowerCase() == myXML.translations.entry.english.toLowerCase){ //return myXML.translations.entry.cockney; trace("success"); }else{ trace("try again!"); // ***I get this as a result } }

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• What makes Ometa special?

  - by Brian

  Ometa is "a new object-oriented language for pattern matching." I've encountered pattern matching in languages like Oz tools to parse grammars like Lexx/Yacc or Pyparsing before. Despite looking at example code, reading discussions, and talking to a friend, I still am not able to get a real understanding of what makes Ometa special (or at least, why some people think it is). Any explanation?

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• regex question for removal of javascript malware

  - by jeff

  Been hit with some nasty javascript malware on my site. I know that each offending code block starts with the following: <script language=javascript><!-- (function() and ends with </script> I'd like to remove the nasty bits via regex on windows, using some sort of freeware regex replacement tool. Any suggestions here? Thank You much.

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• Why is Microsoft not developing a Halo-like next gen title using C#? [closed]

  - by Joan Venge

  The question might look subjective but considering Microsoft: Owns the Xbox 360 platform Owns the Windows platform Have their own game studio (MGS) Own other 3rd party developers Is a major publisher makes me wonder why Microsoft doesn't push their flagship language to prove that not only you can cut down significant development time, and therefore money, but also show that you can release a next gen title where the real time interactivity doesn't suffer. If Microsoft were to do this once, I am sure many AAA developers would jump on that wagon too.

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• What are 'len', 'dir', 'vars' named?

  - by johannix

  I was wondering what language to use when talking about a function that takes in a specific object, acts on it and returns something else. Clearly they're functions, but I was wondering if there's a more specific term. A couple examples of Python built-in functions that fit this spec are: 'len', 'dir', 'vars' I thought it was 'predicate', but apparently that's specific to functions that return a boolean value.

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• Must read books for a programming team leader

  - by takeshin

  As a programming team leader, which books do you recommend? Books about HR, good programming practices etc. I have recently seen PHP Team Development but it is not mind blowing for experienced developers. One of the best I can recommend is Microsoft Manual of Style for Technical Publications, which helped me a lot in improving the language and practices of documenting the code.

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