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• New scripting language

  - by j-t-s

  Hi All I am trying to create a scripting language by myself (it doesn't have to be perfect - although that would be great if it was), mostly because i'm doing it for fun and to learn about how they're created etc. According to the answer over here: http://stackoverflow.com/questions/2439929/creating-a-scripting-language what I'm supposed to be looking into is this: http://msdn.microsoft.com/en-us/library/xawadt95%28VS.85%29.aspx . But, I have absolutely no idea what that MSDN page is on about. Can somebody please help? P.S. Are there any free/open source scripting languages that target the Windows Script Host, that also have full source code available for it that I can play around with? Thank you

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• Why can't I declare C# methods virtual and static?

  - by Luke

  I have a helper class that is just a bunch of static methods and would like to subclass the helper class. Some behavior is unique depending on the subclass so I would like to call a virtual method from the base class, but since all the methods are static I can't create a plain virtual method (need object reference in order to access virtual method). Is there any way around this? I guess I could use a singleton.. HelperClass.Instance.HelperMethod() isn't so much worse than HelperClass.HelperMethod(). Brownie points for anyone that can point out some languages that support virtual static methods. Edit: OK yeah I'm crazy. Google search results had me thinking I wasn't for a bit there.

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• Why are getters prefixed with the word "get"?

  - by Joey

  Generally speaking, creating a fluid API is something that makes all programmers happy; Both for the creators who write the interface, and the consumers who program against it. Looking beyond conventions, why is it that we prefix all our getters with the word "get". Omitting it usually results in a more fluid, easy to read set of instructions, which ultimately leads to happiness (however small or passive). Consider this very simple example. (pseudo code) Conventional: person = new Person("Joey") person.getName().toLower().print() Alternative: person = new Person("Joey") person.name().toLower().print() Of course this only applies to languages where getters/setters are the norm, but is not directed at any specific language. Were these conventions developed around technical limitations (disambiguation), or simply through the pursuit of a more explicit, intentional feeling type of interface, or perhaps this is just a case of trickle a down norm. What are your thoughts? And how would simple changes to these conventions impact your happiness / daily attitudes towards your craft (however minimal). Thanks.

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• i18n with webpy

  - by translation..

  Hello, i Have a problem with i18n, using webpy. I have followed this : http://webpy.org/cookbook/i18n_support_in_template_file So, in my .wsgi there is : #i18n gettext.install('messages',I18N_PATH,unicode=True) gettext.translation('messages',I18N_PATH,languages=['fr_FR','en_US']).install(True) So i ran : pygettext.py -a -v -d messages -o i18n/messages.po controllers/*.py views/*.html I have copied and translated messages.po, I have also change the "content-type" and the "content-transfer-encoding: "Content-Type: text/plain; charset=utf-8\n" "Content-Transfer-Encoding: UTF-8\n" And i ran this command: msgfmt -v -o i18n/fr_FR/LC_MESSAGES/messages.mo i18n/fr_FR/LC_MESSAGES/messages.po >>>93 messages traduits. here is the arborescence of i18n folder: i18n/: en_US fr_FR messages.po i18n/en_US: LC_MESSAGES i18n/en_US/LC_MESSAGES: messages.mo messages.po i18n/fr_FR: LC_MESSAGES i18n/fr_FR/LC_MESSAGES: messages.mo messages.po But when i go in my website (my browser's language is "fr_fr"), i haven't the string translated. And I don't know why. Anyone has an idea? Thanks

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• How to create a web framework in C# without ASPX?

  - by Mark

  I've managed to get a C# asp page running under ubuntu/apache/mono, but I don't want to write my framework in these ASP pages, I want to use straight C# and then I'll use a templating language for my views. But I don't know where to begin? C# is a compiled language, so... how would I do this? Would I compile everything and then have apache hook into the (single) executable and pass in the the request URL? Could I request specific .cs pages and then have apache tell it to compile and then "display" it only if it's been updated? Can the "view" files be compiled individually to avoid having to recompile everything every time there's a change? Is there some "base" I can work from, or am I going to have to reinvent accessing GET and POST variables (by reading header info) and all sorts of other stuff we take for granted in languages like PHP?

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• Looking for programs on audio tape/cassette containing programs for Sinclair ZX80 PC?

  - by DVK

  OK, so back before ice age, I recall having a Sinclair ZX80 PC (with TV as a display, and a cassette tape player as storage device). Obviously, the programs on cassette tapes made a very distinct sound (er... noise) when playing the tape... I was wondering if someone still had those tapes? The reason (and the reason this Q is programming related) is that IIRC different languages made somewhat different pitched noises, but I would like to run the tape and listen myself to confirm if that was really the case...

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• RichFaces rich:insert takes a long time to output large files

  - by Mark Lewis

  Hello I'm using a RichFaces <rich:insert like this: <rich:panel header="my head"> <a4j:outputPanel ajaxRendered="true"> <rich:insert src="#{MyBacking.myPath}" highlight="groovy" /> </a4j:outputPanel> </rich:panel> If I have a 60k file to output, it takes 23 seconds. I've got a requirement to output the contents of some larger files than that and obviously the larger the file, the larger the wait for content. The recommendation in the answer to another related question is to introduce paging. I will, but the question is, why does it take so long to output 60k of text using JSF/RichFaces? That is, reading off a local disk with Windows XP SP2 PC - I can see from the log the data has already been written to disk from the network. Other scripting languages appear to be faster than this - is it something to do with the JSF lifecycle having to handle the text maybe? Thanks

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• Getting started developing an Adobe Premiere plugin?

  - by Moshe

  How do I get started developing a Premiere Pro plugin? I have Premiere Pro CS3 and a working knowledge of VB.NET. (I have experience with a number of other languages that I can use to get around if need be.) Is there an SDK that I'm looking for? Do I need to contact Adobe to join a developer program of sorts? EDIT: Silly me, I've found an SDK on Adobe's site. Where can I find an API or reference?

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• Python vs Ruby Top Sites

  - by Steve

  Hi, I was just trying to find some comparison of the existing python web frameworks and ruby frameworks. There are few promising frameworks in python but I was not able to find a top 100 site using python except for google, which uses python extensively. Python has great frameworks but I am not able to find a really popular sites using python. Definitely most of the site would use python for background processing and stuff. On the other hand, ruby on rails has a few sites like twitter,hulu,yellowpages,scribd are present in top 100 sites. Can you mention some really popular sites using either of these languages.

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• Stack overflow in OCaml and F# but not in Haskell

  - by Fernand Pajot

  I've been comparing for fun different languages for speed in execution of the following program: for i from 1 to 1000000 sum the product i*(sqrt i) One of my implementations (not the only one) is constructing a list [1..1000000] and then folding with a specific funtion. The program works fine and fast in Haskell (even when using foldl and not foldl') but stack overflows in OCaml and F#. Here is the Haskell code: test = foldl (\ a b -> a + b * (sqrt b)) 0 create 0 = [] create n = n:(create (n-1)) main = print (test (create 1000000)) And here is the OCaml one: let test = List.fold_left (fun a b -> a +. (float_of_int b) *. (sqrt (float_of_int b))) 0. ;; let rec create = function | 0 -> [] | n -> n::(create (n-1)) ;; print_float (test (create 1000000));; Why does the OCaml/F# implementation stack overflows?

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• JSP load external php not using iFrames

  - by Rudiger

  I have a bit of an issue with a site I maintain. I have been asked to add a report to a page that sits in a jsp page. The reporting information comes from a MySQL database. The problem is to connect the jsp to the database would require added functions to code that I do not have the original source of. I thought about redoing all the db connection again but thats a lot of time for something that will probably be rewritten in 3 weeks. Then I thought of just using PHP to display the report in the jsp as I have other pages connecting to the database using php (long story as to why were are using 2 languages). But the only way I know of is by using iFrames which is a bit of a no no. Using the object tag I've seen also has errors in IE. What would be the best way to do this?

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• Write a MAT file without using matlab headers and libraries.

  - by YuppieNetworking

  Hello all, I have some data that I would like to save to a MAT file (version 4 or 5, or any version, for that matter). The catch: I wanted to do this without using matlab libraries, since this code will not necessary run in a machine with matlab. My program uses Java and C++, so any existing library in those languages that achieves this could help me out... I did some research but did not find anything in Java/C++. However, I found that scipy on python achieves this with mio4.py or mio5.py. I thought about implementing this on java or C++, but it seems a bit out of my time schedule. So the question is: is there any libraries in Java or C/C++ that permits saving MAT files without using Matlab libraries? Thanks a lot

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• Embedded Prolog Interpreter/Compiler for Java

  - by Sami

  I'm working on an application in Java, that needs to do some complex logic rule deductions as part of its functionality. I'd like to code my logic deductions in Prolog or some other logic/constraint programming language, instead of Java, as I believe the resulting code will be significantly simpler and more maintainable. I Googled for embedded Java implementations on Prolog, and found number of them, each with very little documentation. My (modest) selection criteria are: should be embeddable in Java (e.g. can be bundled up with my java package instead of requiring any native installations on external programs) simple interface to use from Java (for initiating deductions, inspecting results, and adding rules) come with at least a few examples on how to use it doesn't necessarely have to be Prolog, but other logic/constraint programming languages with the above criteria would suit my needs, too. What choices do I have and what are their advantages and disadvantages?

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• GData for my own API?

  - by Malax

  Hi StackOverflow! Im currently planning to build an API for my service. I want to use GData because it fits the application scheme and there are libraries for many programming languages available. The first question that rose: Am I allowed to do that? I mean, Google put lots of work into the GData specification and have some sort of copyright. Does anyone know anything about this issue or did that before? You could extend the case if you want to specifically mimic an API which uses GData like the YouTube API to have my API 100% compliant. This is not my case, but I was wondering about that too. :-) Thank you for any input, Malax Edit: Note that i want to use it for my own service. So, I am implementing an API using the GData protocol, not using one of the Google APIs.

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• Why do Programmers Love/Hate Objective-C?

  - by Genericrich

  So I have noticed that there is a lot of animosity towards Objective-C among programmers. What's your take? Is it a vendor lock-in thing against Apple? General antipathy towards Apple? The syntax? What's your view on this? With the advent of the iPhone SDK, Obj-C has gotten a lot more attention lately, and I am curious what people on SO's opinions are. I personally fought the syntax at first but have gotten more and more used to it now. I really like the named arguments. I have some pet peeves with how things are done in Obj-C vs other languages, but I will refrain from comment on them here.

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• How to parse AMF data in Ruby?

  - by Matchu

  So I see that there are a few Rails plugins for serving AMF. However, is there a library that I can use in a Ruby environment to act as an AMF client: to read AMF data, and deserialize it into a Ruby object? If not, how could I best go about using tools built in other languages? I suppose I could write something in Python or Java or whatever, and call it from Ruby directly via backticks... but I'd first like to ensure that there isn't really any better option. Thanks!

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• Extracting and Parsing data with soapUI

  - by James G

  Hi. So I am in need to learn how to use soapUI pretty quick. I'm finding it pretty tedious to start so I was hoping I might be able to get some help here. Here's what I need to do. Lets say we have Company A and Company B which is a subset of Company B. Now Company A offers a webservice accessible by Company B such that Company B can gather daily aggregated data from Company A's database. Now Company B wants to take this data and publish it on their website. What I'd like is a very basic overview of what I need to do to extract and parse the data onto a website. Just the outline of the process so I can get started. What languages should I be using at what stages and what not. Any help would be highly appreciated.

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• Using R in Processing through rJava/JRI?

  - by tommy-o-dell

  Hi guys, Is it possible to run R in Processing through rJava/JRI? If I deployed a Processing app on the web, would the client need R on their system? I'm looking to create an interactive information dashboard that I can deploy on the web. It seems that Processing is probably my best bet for the interactive/web part of things. Unfortunately, it doesn't look like there are many math/stats functions built-in. And there aren't any libraries for plotting data either. I've been using R and gpplot2 for a few months and am thrilled (amazed) at how easily it manipulates and plots data. So I'm wondering now if can get the best of both worlds and run R through a Processing applet. From the JRI website: JRI is a Java/R Interface, which allows to run R inside Java applications as a single thread. Basically it loads R dynamic library into Java and provides a Java API to R functionality. It supports both simple calls to R functions and a full running REPL. In a sense JRI is the inverse of rJava and both can be combined (i.e. you can run R code inside JRI that calls back to the JVM via rJava). The JGR project makes the full use of both JRI and rJava to provide a full Java GUI for R. JRI uses native code, but it supports all platforms where Sun's Java (or compatible) is available, including Windows, Mac OS X, Sun and Linux (both 32-bit and 64-bit). Thanks for the advice :)

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• Deriving arrays in mathematics

  - by Gio Borje

  So I found some similarities between arrays and set notation while learning about sets and sequences in precalc e.g. set notation: {a | cond } = { a1, a2, a3, a4, ..., an} given that n is the domain (or index) of the array, a subset of Natural numbers (or unsigned integer). Most programming languages would provide similar methods to arrays that are applied to sets e.g. upperbounds & lowerbounds; possibly suprema and infima too. Where did arrays come from?

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• Keyboard layout for international programmers?

  - by splattne

  I think everybody who had to program using a standard German (or any other international) keyboard layout on Windows (or Mac) will complain about the conundrum of either having all special characters ( [ ] | { } / etc. ) needed for most programming languages "at the fingertip" and "losing" the language specific characters (umlauts ä ö ü etc.) on the keyboard or viceversa: having simple access to umlauts, but not to brackets etc. If you are programming in C / C++ / C# / Java / Javascript for example, it is very exhausting if you have to press Alt-Gr + 7 for every opening curly bracket. It is an ergonomic nightmare and reduces your typing efficiency. What is the best way to cope with this problem? Is there a satisfying solution? Maybe there are special layouts or keyboards which address this issue?

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• How to simplify this php switch statement?

  - by janoChen

  I would like to change this: // use appropiate lang.xx.php file according to the value of the $lang switch ($_SESSION['lang']) { case 'en': $lang_file = 'lang.en.php'; break; case 'es': $lang_file = 'lang.es.php'; break; case 'zh-tw': $lang_file = 'lang.zh-tw.php'; break; case 'zh-cn': $lang_file = 'lang.zh-cn.php'; break; default: $lang_file = 'lang.en.php'; } into something like this: //include file for final output include_once 'languages/lang.'.$_SESSION['lang'].'php; So that I can skip the whole switch part. I tried other combinations but they don't seem to work. Any suggestions?

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• Serializing Python bytestrings to JSON, preserving ordinal character values

  - by Doctor J

  I have some binary data produced as base-256 bytestrings in Python (2.x). I need to read these into JavaScript, preserving the ordinal value of each byte (char) in the string. If you'll allow me to mix languages, I want to encode a string s in Python such that ord(s[i]) == s.charCodeAt(i) after I've read it back into JavaScript. The cleanest way to do this seems to be to serialize my Python strings to JSON. However, json.dump doesn't like my bytestrings, despite fiddling with the ensure_ascii and encoding parameters. Is there a way to encode bytestrings to Unicode strings that preserves ordinal character values? Otherwise I think I need to encode the characters above the ASCII range into JSON-style \u1234 escapes; but a codec like this does not seem to be among Python's codecs. Is there an easy way to serialize Python bytestrings to JSON, preserving char values, or do I need to write my own encoder?

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• The best approach for multilingual user interface

  - by Mehdi Golchin

  I am working on a multilingual web application. I'm wondering how do i design the best user interface that the user can localize data for various languages? for instance, in making a page which its title is different in every lang, do i put a textbox for every one? it's not a suitable way to do(in case of 10 lang, the user has 10 textbox!!! too silly) what is your idea about this? Edit: i have no problem with globalization in my system. in fact, i'm looking for a good way for my interface design which user can enter his data to my forms in various langs. thanks in advance

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• Java: How do you really force a GC using JVMTI's ForceGargabeCollection?

  - by WizardOfOdds

  I'm not looking for the usual "you can only hint the GC in Java using System.gc()" answers, this is not at all what this question is about. My questions is not subjective and is based on a reality: GC can be forced in Java for a fact. A lot of programs that we use daily do it: IntelliJ IDEA, NetBeans, VisualVM. They all can force GC to happen. How is it done? I take it they're all using JVMTI and more specifically the ForceGarbabeCollection (notice the "Force") but how can I try it for myself? http://java.sun.com/javase/6/docs/platform/jvmti/jvmti.html#ForceGarbageCollection Also note that this question is not about "why" I'd want to do this: the "why" may be "curiosity" or "we're writing a program similar to VisualVM", etc. The question is really "how do you force a GC using JVMTI's ForceGarbageCollection"? Does the JVM needs to be launched with any special parameters? Is any JNI required? If so, what code exactly? Does it only work on Sun VMs? Any complete and compilable example would be most welcome.

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• What technologies should I focus on to work as a developer in Japan?

  - by Atomiton

  I'm thinking of one day moving to Japan and I was wondering if anyone here has any experience working there. I'm curious as to what languages/technology are popular there for web development and software development. I have heard Ruby is/was strong there due to its founder being Japanese. What would you recommend someone focus on if they wanted to work as a developer in Japan? I have heard Microsoft has a strong base in Japan, but my guess is that whatever platform has supported unicode or Shift-JIS the best would be the strongest.

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