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  • Do you think functional language is good for applications that have a lot of business rules but very

    - by StackUnderflow
    I am convinced that functional programming is an excellent choice when it comes to applications that require a lot of computation (data mining, AI, nlp etc). But is it wise to use functional programming for a typical enterprise application where there are a lot of business rules but not much in terms of computation? Please disregard the fact that there are very few people using functional programming and that it's kind of tough. Thanks

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  • tkinter python entry not being displayed

    - by user1050619
    I have created a Form with labels and entries..but for some reason the entries are not being created, peoplegui.py from tkinter import * from tkinter.messagebox import showerror import shelve shelvename = 'class-shelve' fieldnames = ('name','age','job','pay') def makewidgets(): global entries window = Tk() window.title('People Shelve') form = Frame(window) form.pack() entries = {} for (ix, label) in enumerate(('key',) + fieldnames): lab = Label(form, text=label) ent = Entry(form) lab.grid(row=ix, column=0) lab.grid(row=ix, column=1) entries[label] = ent Button(window, text="Fetch", command=fetchRecord).pack(side=LEFT) Button(window, text="Update", command=updateRecord).pack(side=LEFT) Button(window, text="Quit", command=window.quit).pack(side=RIGHT) return window def fetchRecord(): print('In fetch') def updateRecord(): print('In update') if __name__ == '__main__': window = makewidgets() window.mainloop() When I run it the labels are created but not the entries.

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  • What language/compiler for native running of application in any windows(XP/Vista/7) platform?

    - by Xinxua
    Hi, I want to develop an application that runs on any windows platform (XP, Vista, 7) but does not require a dependency like .NET Framework or JVM. I have given the other requirements below: Runs in any windows platform Must have GUI libraries to create windows/primitive controls I also want the output file size of the application to be minimal (So cannot include .net frameword etc in the exe file) Any suggestions for this requirement?

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  • Git Clone from SSH Repository

    - by Mike Silvis
    I used to be able to clone from my personal git repository but now i seem to be running into an error. user:dev.site.com mikesilvis$ git clone { my ssh directory } server@ipaddress's password: remote: Counting objects: 3622, done. remote: Compressing objects: 100% (2718/2718), done. error: git upload-pack: git-pack-objects died with error. fatal: git upload-pack: aborting due to possible repository corruption on the remote side. remote: aborting due to possible repository corruption on the remote side. fatal: early EOF fatal: index-pack failed It seems to be working however while I push files to the repository.

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  • What next generation low level language is the best bet to migrate the code base ?

    - by e-satis
    Let's say you have a company running a lot of C/C++, and you want to start planning migration to new technologies so you don't end up like COBOL companies 15 years ago. For now, C/C++ runs more than fine and there is plenty dev on the market for it. But you want to start thinking about it now, because given the huge running code base and the data sensitivity, you feel it can take 5-10 years to move to the next step without overloading the budget and the dev teams. You have heard about D, starting to be quite mature, and Go, promising to be quite popular. What would be your choice and why?

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  • Would it be simply better to use the system's functions rather than use the language?

    - by Nullw0rm
    There are many scenarios where I've questioned PHP's performance with some of its functions, and whether I should build a complex class to handle specific things using its seemingly slow tools. For example, Complex regular expressions with sed and processing with awk would seemingly be exponential in performance rather than making PHP's regular expression and seemingly excessive functions parse and in time manage to finish it. If I were to do a lot of network tasks such as MX lookups/DIGging/retrieving simultaneously I would rather pass it via system() and let the OS handle it itself. There are simply too many functions in PHP, that are inefficient and result in slow pages or can be handled easier by the OS. What are your opinions? Do you think I should do the hard work with the OS in its own/custom functions?

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  • How to display and change an icon inside a python Tk Frame

    - by codingJoe
    I have a python Tkinter Frame that displays several fields. I want to also add an red/yellow/green icon that will display the status of an external device. The icon is loaded from a file called ICON_LED_RED.ico. How do I display the icon in my frame? How do I change the icon at runtime? for example replace BitmapImage('RED.ico') with BitmapImage('GREEN.ico') class Application(Frame): def init(self, master=None): Frame.__init__(self, master) self.pack() self.createWidgets() def createWidgets(self): # ...other frame code.. works just fine. self.OKBTN = Button(self) self.OKBTN["text"] = "OK" self.OKBTN["fg"] = "red" self.OKBTN["command"] = self.ok_btn_func self.OKBTN.pack({"side": "left"}) # when I add the following the frame window is not visible # The process is locked up such that I have to do a kill -9 self.statusFrame = Frame(self, bd=2, relief=RIDGE) Label(self.statusFrame, text='Status:').pack(side=LEFT, padx=5) self.statIcon = BitmapImage('data/ICON_LED_RED.ico') Label (self.statusFrame, image=self.statIcon ).grid() self.statusFrame.pack(expand=1, fill=X, pady=10, padx=5)

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  • Why we used double pointer in objective-C or C language?

    - by Rajendra Bhole
    Hi, I confused when i want to take single pointer and when should i take double pointer? In following structure what exactly did? struct objc_class { Class isa; Class super_class; const char *name; long version; long info; long instance_size; struct objc_ivar_list *ivars; struct objc_method_list **methodLists; struct objc_cache *cache; struct objc_protocol_list *protocols; }; Why we use the "**methodLists" double pointer?

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  • How are python pages coded and what can the language be compared to? [closed]

    - by avon_verma
    I have a few questions about python I've seen many pages like these on Google http://mail.google.com/support/bin/answer.py?answer=6583 https://www.google.com/adsense/support/bin/topic.py?topic=13488 ...that have .py extensions. 1: Are pages like these built on pure python code, but printing out html like print "<div etc..." or like the typical asp,jsp,php type of pages with html pages and embedded python code like: <html> <% some python code %> </html> 2: What is python mainly used for making? windows apps or web or .. ? 3: Are ruby and perl also similar to python?

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  • Why do most web hosting services support only php as server-side language?

    - by HJ-INCPP
    Hello, I have been working with java and python, so I found a nice web host which has support for these. But my question is, why can you find so hard such hosts? I understand that php is easy, I also understand that oracle host is hard to find ($$$ of course), but what do they have against some good open-source, completely free java spring, jsp, django, python, ror, perl etc etc .... So rare to find hosts ... not to mention freelancer bids Thank you.

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  • When we run an aspx page with client side scripting on IIS, we get an ActiveX control error?

    - by Ananya
    we have implemented the code for installing the messenger theme pack using the client side scripting in a web page. We are creating an object of the messenger using the classid .Using this object we call the installcontent() method and try to install the messenger theme pack hosted at following path: http://www.messengerexpressions.com/assets/worldCup/cabs/en-gb.cab Our code initially checks whether the messenger is installed on the user machine or not. Then it checks for the user login ,once the messenger is installed on the machine. And if the user is signed-in , the messenger theme pack is installed. The code currently when hosted on IIS checks the “Sign-In of the user” but when it tries to install the theme pack an error is thrown “An ActiveX control on this page is unsafe.Your current security settings prohibit running unsafe control on this page.As a result,this page may not be display as intended.” Please let us know if any setting is required on IIS for running this piece of codeor anything that we are missing out.

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  • What is the best AI language/framework for .NET?

    - by Eduardo Cobuci
    I'm building an academic work that consists in a turn-based strategy game. I'm using XNA 3 for the graphics but didn't decide what to use for AI. I was considering to use P#, a Prolog interpreter for .NET but i found it a bit poor. Do you anything better for game AI than Prolog (maybe Haskell?) or a better interpreter then P#?

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  • Which relational databases exist with a public API for a high level language?

    - by Jens Schauder
    We typically interface with a RDBMS through SQL. I.e. we create a sql string and send it to the server through JDBC or ODBC or something similar. Are there any RDBMS that allow direct interfacing with the database engine through some API in Java, C#, C or similar? I would expect an API that allows constructs like this (in some arbitrary pseudo code): Iterator iter = engine.getIndex("myIndex").getReferencesForValue("23"); for (Reference ref: iter){ Row row = engine.getTable("mytable").getRow(ref); } I guess something like this is hidden somewhere in (and available from) open source databases, but I am looking for something that is officially supported as a public API, so one finds at least a note in the release notes, when it changes. In order to make this a question that actually has a 'best' answer: I prefer languages in the order given above and I will prefer mature APIs over prototypes and research work, although these are welcome as well.

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  • Does any language have a while-else flow structure?

    - by dotancohen
    Consider this flow structure which I happen to use often: if ( hasPosts() ) { while ( hasPosts() ) { displayNextPost(); } } else { displayNoPostsContent(); } Are there any programming languages which have an optional else clause for while, which is to be run if the while loop is never entered? Thus, the code above would become: while ( hasPosts() ) { displayNextPost(); } else { displayNoPostsContent(); } I find it interesting that many languages have the do-while construct (run the while code once before checking the condition) yet I have never seen while-else addressed. There is precedent for running an N block of code based on what was run in N-1 block, such as the try-catch construct. I wasn't sure whether to post here or on programmers.SE. If this question is more appropriate there, then please move it. Thanks.

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  • Why doesn't every, and I mean it, language have this feature?

    - by dada
    Some time ago I had a look into Ruby and one of the things which stood out most for me was the way of using symbols. While you to use defines or strings like in C++ or Python as an alternative, in Ruby you just write :mySymbol and the interpreter takes over the enumeration for you. I can't see any disadvantage this feature has, so why is it missing in say, PHP and Python?

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  • Is developing iPhone apps in any language other than Objective-C ever a truly viable solution?

    - by David Foster
    I hear all this stuff about crazy ways to build iPhone apps using Ruby or C# under .NET or the like. Even stuff about developing apps on Windows using Java, or auto-generated apps using Flash CS5 or something. Now, I've never really spent any time at all investigating these claims—I just brushed them off as clumsy or cumbersome or down-right claptrap—but I'm a proud Objective-C programmer who's perhaps a little worried as to whether there's any truth in all of this?

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