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  • class member access specifiers and binary code

    - by pdehaan
    I understand what the typical access specifiers are, and what they mean. 'public' members are accessible anywhere, 'private' members are accessible only by the same class and friends, etc. What I'm wondering is what, if anything, this equates to in lower-level terms. Are their any post-compilation functional differences between these beyond the high-level restrictions (what can access what) imposed by the language (c++ in this case) they're used in. Another way to put it - if this were a perfect world where programmers always made good choices (like not accessing members that may change later and using only well defined members that should stay the same between implementations), would their be any reason to use these things?

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  • Find and list all functions/methods in a set of JavaScript files

    - by Dan Milstein
    Is there a way to read a set of JavaScript files, and output a description of where every function/method is defined? I realize that this is likely impossible in full generality, due to the extreme dynamic nature of the language. What I'm imagining is something which gets the (relatively) straightforward cases. Ideally, I'd want it figure out where, e.g. some method got attached to string or hash or some other fundamental class (and also just let you find all the classes/functions that get defined once in one place). Does such a tool exist?

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  • When can we say that we have mastered something

    - by Thinking
    I donot know if this is a valid question to ask here or not but I have asked this as because i have the doubt In many interviews , the interviewer ask as how much you want ot rate yourself on a scale of 10 in C#, Jave etc. Some says 6 some 7 .... My question is how to judge where I am standing at present? And when can we say that we have mastered a language or a topic. As everything is huge and everyday we learn something.. so there is no end to it... so how can I judge that? Thanks

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  • Dispatching generic tasks in WCF or .Net Remoting

    - by Eric
    Hello all, I've been researching for a couple days on and off, and have yet to figure out the best way to achieve the following goal. I would like to define either an interface or abstract class in C# which has an associated Run method, similar to the Java runnable interface. The goal would be to have a shared queue which contains a list of these objects. Then individual clients would be able to derive their own concrete runnable classes and add them to the queue hosted by the server. Clients would also be able to pop these runnable objects off the queue and execute them arbitrarily. This seems like it should be feasible in a VM based language without needing to place any of the concrete implementations in a shared assembly, but I have thus far had no luck finding a working example of such a system. Does anyone know how this might be achieved?

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  • What scripts should not be ported from bash to python?

    - by Jack
    I decided to rewrite all our Bash scripts in Python (there are not so many of them) as my first Python project. The reason for it is that although being quite fluent in Bash I feel it's somewhat archaic language and since our system is in the first stages of its developments I think switching to Python now will be the right thing to do. Are there scripts that should always be written in Bash? For example, we have an init.d daemon script - is it OK to use Python for it? We run CentOS. Thanks.

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  • Is the FoldLeft function available in R?

    - by JSmaga
    Hi, I would like to know if there is an implementation of the foldLeft function (and foldRight?) in R. The language is supposed to be "rather" functional oriented and hence I think there should be something like this, but I could not find it in the documentation. To me, foldLeft function applies on a list and has the following signature: foldLeft[B](z : B)(f : (B, A) => B) : B It is supposed to return the following result: f(... (f(f(z, a0), a1) ...), an) if the list is [a0, a1, ..., an]. (I use the definition of the Scala List API) Does anybody know if such a function exists in R?

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  • Can a parser tell the lexer to ignore a newline?

    - by chollida
    I'm writing a preprocessor for my language. In the preprocessor I've output a line that wasn't in the source file. This causes any error messages that Anltr creates to be incremented by one line. The Lexer handles the line count so I'm wondering if there is a way for the parser to tell the lexer to decrement the line count, or to ignore a specific newline. I'm also open to other suggestions on how to work around this. The only constraint I have is putting the extra line inline with the existing code. I'd prefer to keep it on it's own line to keep my parsing sane.

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  • Can you write to a file (on a disk) in JavaScript?

    - by asdfqwer
    I don't wanna come across as a troll, so please excuse my question's demeanor, but I am a novice-intermediate programmer taking a stab at AJAX. While reading up on JavaScript I found it curious that most of the examples I've been drawing on use PHP for such an operation. I know many of you may argue that 'I'm doing it wrong' or 'JavaScript is a client-side language' etc. but the question stands. . .can you write a file in only JavaScript? EDIT: Sorry, just read faq, failed to mention this my first post on Stackoverflow while I hope I'm not sounding argumentative, pompous, or subjective.

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  • Is it possible to achieve string localization inside of a statically linked lib?

    - by user3696003
    I am working on building an SDK which will be built out as a statically linked library that third party applications can then drop in to their applications. Inside of this SDK, I was looking to be able to perform some "localization." Basically, I would like for the code in my SDK to be able to access some ".string" files to perform some string lookup and language translation capabilities. Then I could propagate these strings outward to implementing App layers through my exposed API's. Is this even possible? I thought it was but now that I have actually been trying, I am seriously having doubts.

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  • C++ Inheritance Question

    - by shaz
    I have a base class MessageHandler and 2 derived classes, MessageHandler_CB and MessageHandler_DQ. The derived classes redefine the handleMessage(...) method. MH_DQ processes a message and puts the result in a deque while MH_CB processes the message and then executes a callback function. The base class has a static callback function that I pass along with a this pointer to a library which calls the static callback when a new message is available for processing. My problem comes when I am in the static callback with a void * pointing to either a MH_DQ or a MH_CB. If I cast it to the base class the empty MessageHandler::handleMessage(...) method is called, rather than the version in the appropriate derived class. What is the best way to address this situation from a design perspective and/or what language features might help me to implement a solution to my problem? Thanks in advance!

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  • class member access specifiers

    - by pdehaan
    I understand what the typical access specifiers are, and what they mean. 'public' members are accessible anywhere, 'private' members are accessible only by the same class and friends, etc. What I'm wondering is what, if anything, this equates to in lower-level terms. Are their any post-compilation functional differences between these beyond the high-level restrictions (what can access what) imposed by the language (c++ in this case) they're used in. Another way to put it - if this were a perfect world where programmers always made good choices (like not accessing members that may change later and using only well defined members that should stay the same between implementations), would their be any reason to use these things?

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  • 4D - is it any good?

    - by Pies
    Recently I found out that the company a friend of mine co-owns uses 4D, which I've never heard of before. They swear by it, but they're non-technical and what they say about it sounds like memorized marketing blurb. Unfortunately the 4D website also seems devoid of any actual information and is filled with words like "comprehensive", "solution", "platform" and "integrated" instead. Since that thing is rather expensive and uses a custom language that I don't have much inclination to learn just for one project, I'm cautious about it and I'm wondering if anyone had any experience with it? Would you recommend it? What is it good for? What competitive advantage would I gain by learning it as a programmer, or using it as a company?

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  • .NET security mechanism to restrict access between two Types in the same Website project?

    - by jdk
    Question: Is there a mechanism in the .NET Framework to hide one custom Type from another without using separate projects/assemblies? I'm using C# with ASP.NET in a Website project (Note: Not a Web Application). Obviously there's not a way to enforce this restriction using language-specific OO keywords so I am looking for something else, for example: maybe a permission framework or code access mechanism, maybe something that uses meta data like Attributes. I'm unsure. I don't really care whether the solution actually hides classes from each other or just makes them inaccessible, etc. A runtime or design time answer will suffice. Looking for something easy to implement otherwise it's not worth the effort ... Background: I'm working in an ASP.NET Website project and the team has decided not to use separate project assemblies for different software layers. Therefore I'm looking for a way to have, for example, a DataAccess/ folder of which I disallow its classes to access other Types in the ASP.NET Website project.

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  • How do i sort by: most viewed, most commented, most popular, best rating, etc?

    - by MrRioku
    Pretty basic question.. I kno.., I just don't know how its done. I see it everywhere. I want to be able to sort out my content in my websites by most viewed, most commented, most popular, best rating, etc...with a drop down list, check box, etc... but I don't know how "sort by" works? Which scripting language should it be written in? Javascript? PHP? Can it be done with XML? Do I have to have a database set up like MySQL? Is there a good tutorial anywhere that explains it? I need to be explained the exact process of how it works. As you can see I really need direction.. Your help is much appreciated :D

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  • Mapping C structure to an XML element

    - by EFraim
    Suppose I have a structure in C or C++, such as: struct ConfigurableElement { int ID; char* strName; long prop1; long prop2; ... }; I would like to load/save it to/from the following XML element: <ConfigurableElement ID="1" strName="namedElem" prop1="2" prop2="3" ... /> Such a mapping can be trivially done in Java/C# or any other language with run-time reflection for the matter. Can it be done in any non-tedious way in C++ with macros/template trickery? Bonus points for handling nested structures/unions.

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  • Having trouble with Flash, Javascript and JQuery

    - by andypants
    I'm using JQuery with the JQuery flash plugin (http://jquery.lukelutman.com/plugins/flash/) and trying to send a JS call back to the flash, I keep running into "xxx is not a function" so apparently something is off. I'm new to JQuery and very new to this jquery flash plugin and just can't quite wrap my head around what I am doing wrong. Here's where I'm lading up the flash: <div id="tagimgback"> <script language="javascript"> $(document).ready(function(){ $('#tagflash').flash( { src: 'tagflash', width: 200, height: 200, flashvars: {theYear:'2010',theTagNumber:'123'} }, { version: 8 } ); }); </script> </div> And here's where I'm trying to call it: $("#tagflash").gotoNewFrame(theTagNumber); gotoNewFrame is an AS function within my flash. I know the function works as I've been able to test it prior to bringing jQuery into the mix.

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  • Starting out with Objective C; need some guidance

    - by alimaxwell
    Hi Everyone, I have started learning Objective C with no prior programming experience from the 'Become an X-Coder' eBook (http://download.cocoalab.com.s3.amazonaws.com/BecomeAnXcoder.pdf). My question is, if I want to be doing iPhone development, am I going in the right direction? Am I learning the wrong language, or should I be learning Cocoa Touch? As I said, I have no prior experience, and just need someone to point me in the right direction. Apoligies if I have put this in the wrong place. Thanks very much for your time.

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  • Advanced Registry Monitoring

    - by RyanTimmons91
    I'm attempting to create a small utility to watch for the creation (or modification) of a specific registry key, and to kill the process responsible for causing that registry modification. I have had success in watching the changes to the registry via a class called 'RegistryMonitor', however it does not give you any information on what process initiated the registry call, through some googling I found that a library called 'EasyHook' should be able to do what I want, but all the documentation states that its designed for a per-application hook. The program itself is a temporary security patch, until our vendors come out with an official security update. As best I can tell there isn't a way to do exactly what I want to accomplish from C#, which is the only language I can comfortable write, test and execute software in. Any help on this would be appreciated I'm considering watching the registry changes via the program I already have, then if the change is discovered (the pc is already infected) running RKill and locking down the PC to prevent the issue from getting any worse

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  • What can we do to make XML processing faster?

    - by adpd
    We work on an internal corporate system that has a web front-end as one of its interfaces. The front-end (Java + Tomcat + Apache) communicates to the back-end (proprietary system written in a COBOL-like language) through SOAP web services. As a result, we pass large XML files back and forth. We believe that this architecture has a significant impact on performance due to the large overhead of XML transportation and parsing. Unfortunately, we are stuck with this architecture. How can we make this XML set-up more efficient? Any tips or techniques are greatly appreciated.

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  • How to open a text file that's not in the same folder?

    - by nunos
    Since C it's not a language I am used to program with, I don't know how to do this. I have a project folder where I have all the .c and .h files and a conf folder under which there is a config.txt file to read. How can I open that? FILE* fp = fopen("/conf/config.txt"); if (fp != NULL) { //do stuff } else printf("couldn't open file\n"); I keep getting the error message. Why? Thanks.

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  • response from server

    - by john
    When I create request to the server: <script language="javascript" type="text/javascript"> function ajaxFunction() var ajaxRequest; try{ ajaxRequest = new XMLHttpRequest(); } catch (e){ try{ } catch (e) { try{ ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP"); } catch (e){ alert("Your browser broke!"); return false; } } } ajaxRequest.onreadystatechange = function(){ if(ajaxRequest.readyState == 4){ document.write(ajaxRequest.responseText); document.myForm.time.value = ajaxRequest.responseText; } } ajaxRequest.open("GET", "http://www.bbc.co.uk", true); ajaxRequest.send(null); } </script> Why response is nothing? Why response isnt html code of this web site?

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  • VB to c++ or c#?

    - by hilzmas
    I am trying to translate this code but I don't understand how to use the GET / PUT part of the code in another language like c++ or c#. This is the code : Private Sub cmd_Click() Dim i As Integer, a As Integer a = 10 For i = 1 To a Dim file As String Open "txt" For Binary As #1 file = Space(LOF(1)) Get #1, , file Close #1 Randomize Open "txtpath" & "\" & i & "txtname" For Binary As #1 Put #1, , file Put #1, , Rnd Close #1 Next i End Sub The code could have bug because I replaced variables with plain text. What I understand is that the code get a file and then save it with some random data added to make it look different than the original. I don't use vb since years and I don't remember anything about it. Can someone help me porting this snippet to c++ or c#?

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  • How to make use of Tags property of an xml node to get its information and attributes?

    - by user72731
    How would i make use of tags property of a node so that i can get the attributes of an xml node. I have to display an xml tree in a winform and then when i click on any node, its attributes should get displayed on a list box in same window. I want to make use of tags property, but for that i need to convert that tree node in the winform into an xml node. I wanted to store the tree node in the tag and then typecast that tag to an xml node. I dont know how to do it? I am a newbie at C# so there might be some discrpancy in language...please help

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  • trying to understand some codes related to window.onload in js

    - by user2507818
    <body> <script language="javascript"> window.tdiff = []; fred = function(a,b){return a-b;}; window.onload = function(e){ console.log("window.onload", e, Date.now() ,window.tdiff, (window.tdiff[1] = Date.now()) && window.tdiff.reduce(fred) ); } </script> </body> Above code is taken from a site. In firefox-console, it shows: window.onload load 1372646227664 [undefined, 1372646227664] 1372646227664 Question: For window.tdiff->[undefined, 1372646227664], why not:[], because when runs to code:window.tdiff, it is still an empty array? For window.tdiff.reduce(fred)->1372646227664, window.tdiff = [undefined, 1372646227664], undefined - 1372646227664, should be NaN, why it shows 1372646227664?

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  • What are some good practice assignments for learning Java?

    - by HW
    Hello, I am a computer science in my Student Second year. I already know a good deal about C++, Data Structures, File Structures, OOP, etc. I decided to learn Java. I have read couple of books but I know that it takes practice to master any Programming language. I was wondering if anyone knew of some assignments or problems that helped them become good at programming. I am looking for something more challenging than "hello world"s and "3+2=5"s exercises. Thanks, ~HW

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