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  • What Are Collections Implemented As In VB6?

    - by Tom Tresansky
    So a collection in VB6 keeps track of a key for each object, and you can look up the object by its key. Does that mean collections are implemented as some sort of hashtable under the hood? I realize you can have multiple items with the same key in a collection, hence the SOME SORT. Anybody know what type data structure a VB6 collection is supposed to represent?

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  • possible implementations of casting in c++

    - by lego69
    I have this snippet of the code in my header: class A { private: int player; public: A(int initPlayer = 0); A(const A&); A& operator=(const A&); ~A(); void foo() const; friend int operator==(const A& i, const A& member) const; }; implementation of the operator== int operator==(const A& i, const A& member) const{ if(i.player == member.player){ return 1; } return 0; } and I need casting for this part of my code: A *pa1 = new A(a2); assert(i == *pa1); i - is some int, which my function receives I receive an error non-member function, How can I fix it? thanks in advance

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  • Sub Language C#

    - by j-t-s
    Hi All I was just wondering, is it at all possible to create sort of like a "Sub-language" in C# OR C++? or would a better term be "Extension"? And can somebody please provide links/resources? Much appreciated! :) thanks jason

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  • Analyzing BSOD without a dump

    - by eeoo2555
    One of the drivers I'm developing has caused a BSOD. Unfortunately a dump file was not created since it was not configured / low resources. I was trying to reproduce this crash but no luck so far. Is there any way to get some info using WinDbg or any other tool? I have this information: A screenshot of the BSOD The .sys file. Its pdb The source code The machine it was crashed on I have everything except the dump itself. Your help will be much appreciated. As I said above, no dump (/minidump) exists. This is the actual problem. For this specific crash, I know I won't be able to get the stack. Just getting the specific line of code will be good enough. Because the BSOD contains the module's address, it seems like there should be a way to detect which line exactly is it. As I mentioned above, I do have the .sys file, the pdb and the source code. This is the specific code taken from MSDN: SYSTEM_SERVICE_EXCEPTION. How can I know from there what was the specific line? and/or the specific exception raised?

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  • Strange output produced by program

    - by Boom_mooB
    I think that my code works. However, it outputs 01111E5, or 17B879DD, or something like that. Can someone please tell me why. I am aware that I set the limit of P instead of 10,001. My code is like that because I start with 3, skipping the prime number 2. #include <iostream> bool prime (int i) { bool result = true; int isitprime = i; for(int j = 2; j < isitprime; j++) ///prime number tester { if(isitprime%j == 0) result = false; } return result; } int main (void) { using namespace std; int PrimeNumbers = 1; int x = 0; for (int i = 3 ; PrimeNumbers <=10000; i++) { if(prime(i)) { int prime = i; PrimeNumbers +=1; } } cout<<prime<<endl; system ("pause"); return 0; }

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  • Multiplying numbers on horizontal, vertial, and diagonal lines

    - by untwisted
    I'm currently working on a project Euler problem (www.projecteuler.net) for fun but have hit a stumbling block. One of the problem provides a 20x20 grid of numbers and asks for the greatest product of 4 numbers on a straight line. This line can be either horizontal, vertical, or diagonal. Using a procedural language I'd have no problem solving this, but part of my motivation for doing these problems in the first place is to gain more experience and learn more Haskell. As of right now I'm reading in the grid and converting it to a list of list of ints, eg -- [[Int]]. This makes the horizontal multiplication trivial, and by transposing this grid the vertical also becomes trivial. The diagonal is what is giving me trouble. I've thought of a few ways where I could use explicit array slicing or indexing, to get a solution, but it seems overly complicated and hackey. I believe there is probably an elegant, functional solution here, and I'd love to hear what others can come up with.

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  • linked list problem

    - by progster
    Delete every 't'th (t1) node of a single linked list. In the resultant linked list, again delete 't'th node. Repeat this till only t-1 nodes remains. For this i have come up with: Traverse until you reach 't'th node, delete all the nodes till the end. Is there any efficient way other than this?. Can any one please help me out. Thanks.

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  • ASP.Net aspx markup

    - by Batuta
    I am working on some old web forms application. When I changed from design to view source of the aspx page, the aspx markup becomes disarranged. For example, a label is written as follows: <asp:label id="Label20" style="Z-INDEX: 119; LEFT: 16px; POSITION: absolute; TOP: 424px" runat="server" Height="24px" Width="72px">Instructions:</asp:label> It suddenly becomes like this (when I toggle from design to source) <asp:label id="Label20" style="Z-INDEX: 119; LEFT: 16px; POSITION: absolute; TOP: 424px" runat="server" Height="24px" Width="72px">Instructions:</asp:label> Notice that the alignment and margins, tab stops are changed. Any idea how to prevent VS from doing this? Thanks.

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  • Are there any good version control programs for a Windows box that do not have to be installed?

    - by CaffeineZombie
    On my work machine, I do not have the permissions to install anything, and astoundingly, there are not any version control software packages set up. I am using VS2008, and was hoping to work around depending on SourceSafe. I've talked to the network admin, and all I could get was "We don't have any version control set up." Are there any good ways of going about this, or do I have to just bite the bullet?

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  • Will Haskell be a good choice for my task?

    - by Narzanka
    I'm starting a new project and don't know which language to use. My 'must have' requirements are: Be able to run on Windows/LinuxMacOs natively (native executable) - user should be able to just run the exe (when on Windows for example) and see the results. No runtimes/interpreters (no jvm, clr, etc) - one file download should be enough to run the application. Full unicode support. Be able to manipulate OS threads (create them, run multiple tasks in parallel on multi-core CPUs, etc). Be reasonably fast (Python level performance and better). To have some kind of standard library that does low-level, mundane tasks. Not very niche and have some community behind it to be able to ask questions. My 'nice to have' requirements are: Language should be functional It should have good string manipulation capabilities (not necessarily regex) Not extremely hard to learn I'm thinking about Haskell now but keeping in mind OCaml as well. Please advice if my choice is correct.

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  • Protecting IP for scripting projects

    - by Francisco Garcia
    There are some tasks where the obvious language choice is with scripting languages: bash, Python, Ruby, Tcl... however I find it hard to protect a company IP once the product is delivered because the application is never compiled. The client will have complete access to every single line of code. Which one are the choices to protect a product IP when it is best implemented with scripting languages? (switching to a compiled language such as C++ should not be an option) I know that some interpreted languages can be compiled, but there are cases where the process can be inverted

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  • Strange ruby syntax

    - by AntonAL
    Hi, what the syntax is in Action Mailer Basics rails guide ? class UserMailer < ActionMailer::Base def welcome_email(user) recipients user.email from "My Awesome Site Notifications <[email protected]>" subject "Welcome to My Awesome Site" sent_on Time.now body {:user => user, :url => "http://example.com/login"} end end How should i understand the construction, like from "Some text for this field" Is it an assignment the value to a variable, called "from" ?

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  • what's the job of std::unique_lock when used with std::conditional_variable::wait()

    - by Mike
    I'm quite confused with the need of a std::unique_lock when wait a std::conditional_variable. So I look into the library code in VS 2013 and get more confused. This is how std::conditional_variable::wait() implemented: void wait(unique_lock<mutex>& _Lck) { // wait for signal _Cnd_waitX(&_Cnd, &_Lck.mutex()->_Mtx); } Is this some kind of joke? Wrap a mutex in a unique_lock and do nothing but get it back latter? Why not just use mutex in the parameter list?

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  • CodeContracts: Possibly calling a method on a null reference

    - by dtb
    I'm having an argument with the CodeContracts static analysis tool. My code: class Foo { private static Foo instance = new Foo(); private string bar; public Foo() { bar = "Hello World"; } public static int BarLength() { return instance.bar.Length; // <<-- } } The tool tells me that instance.bar may be a null reference. I believe the opposite. Who is right? How can I prove it wrong?

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  • piping to variables

    - by lego69
    cut -d" " -f2 ${2} | $callsTo hello, can somebody please explain can I pipe the result of cut to variable callsTo, and how will it be stored, as the string or list?

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