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  • Generic collection as a Java method argument

    - by Guido
    Is there any way to make this work in Java? public static void change(List<? extends Object> list, int position1, int position2) { Object obj = list.get(position1); list.set(position1, list.get(position2)); list.set(position2, obj); } The only way I've successfully avoided warnings and errors is this: public static <T> T change(List<T> list, int position1, int position2) { T obj = list.get(position1); list.set(position1, list.get(position2)); list.set(position2, obj); return obj; } but I don't like to be forced to return a value.

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  • Compiler is able to find function without matching .h file is updated?

    - by Maxim Veksler
    Hello Friends, I'm writing a C University project and stumbled upon a compiler behavior which I don't understand. In this file http://code.google.com/p/openu-bsc-maximveksler/source/browse/trunk/20465/semester/tasks/maman14/alpha/maman14/assembler/phaseOne.c?r=112 I've added a call to function named freeAsmInstruction(). This function is defined in file named lineParser.c, yet I haven't updated the matching lineParser.h header file to include this function declaration. Why does this code compile? I would expect that gcc would fail to compile phaseOne.c until the correct lineParser.h is updated with the declaration of freeAsmInstruction(). I would appreciate an explanation. Thank you, Maxim

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  • What is a good programming language for beginners? [closed]

    - by user122401
    Possible Duplicates: Best ways to teach a beginner to program? What is the easiest language to start with? What is a good programming language for beginners? I am 15 and had learned C++ before never got into it though? But is this like learning a new language? like having to do it over and over and every day having new stuff to learn ?

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  • how to effectively modify index

    - by daedlus
    Hej everyone, problem : I am looking for right way to convert an index from clustered to non-clustered Description : I have a table as below in sybase db: dbo.UserLog Id | UserId |time | .... This is hash partitioned using UserId. Currently it has 2 indexes UserId : non-clustered time: clustered This table has about 20 million records. I now want to make UserId as clustered index and time as non-clustered index. is it correct to user alter index to change from clustered to non-clustered or do i drop index and recreate. does the fact that userId is used in hash partitioning have any implications to this? To me alter seems way to go but I have not yet tried this.

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  • how to implement video and audio merger program ?

    - by egebilmuh
    Hi guys I want to make a program which takes video and audio and merges them. Video Type or audio type is not important for me. I just want to make so- called program. How can i make this ? does any library exist for this ? (I know there are many program about this topic but i want to learn how to implement such a program.) Help me please about this topic.

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  • What is the easiest language to start with?

    - by Teifion
    What is the language with the lowest barriers to entry, simplest syntax, easiest setup. I'm aware that there's not a best language but I am sure that there will be one that's got a good score in all three areas. It's for teaching friends how to program, I like PHP and Python but I don't want to be narrow minded and limit myself when there is a better option out there. Common suggestions Ruby Python Basic C Java C# Useful links Best Ways To Teach A Beginner to Program Why's (Poignant) Guide to Ruby Think Python

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  • Execute javascript from link

    - by GigaPr
    Hi, i am just trying to create a link which execute some JavaScript in stead to redirect the user to a particular page I tried the following but it doesn t work <a href="#" onclick="javascript:location.replace('http://http://stackoverflow.com/questions/ask');">www.google.com</a><br /> <a href="javascript:location.replace('http://stackoverflow.com/questions/ask');">www.google.com</a> I am not trying to do anything illegal whit the redirect, just an exercise for a university module (Internet Security) Thanks

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  • recognising hand written code [closed]

    - by ben-jolly
    i need to perform some operations on image files. i need to verify each pixels of that particular image file. how can i do that?? ... help me by providing a method to include image file..... iam planning to do it in c language... so provide useful commands too.

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  • Winforms vs WPF

    - by m0s
    I am a student and I do freelance here and there when I have opportunity. I believe my strongest language is C#. I don't really know what is going on in real programming world, so I was wondering if WPF did take over WinForms? I know the differences between two and how two can be used simultaneously but, I just don't want to invest my time in learning dying technologies, I hope you understand. So, for windows desktop programming what would you recommend to master WinForms, WPF or maybe both? I also get a lot that desktop programming is dead already and one should only care about learning web programming.

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  • Problem with Classes in Python..

    - by Gui
    Ok guys, I'm really new at python (and programming itself) so sorry for my ignorance, but I really needed to ask this. So im doing a wxPython project where I added several tabs for a notebook (each tab of the notebook = a class) and there is one tab where I added a checkbox (in a tab, lets call it for example Tab1), and what I want is that when someone checks it, a button that exists in other tab (class called for example tab2) gets hidden where previously it was being shown. Well I see that it isn't hard to accomplish this, but my problem is the classes (tab1 and tab2, in this example). I've been trying to figure it out by searching but I guess im not searching hard enough because I just can't get it right. If they were in the same class I wouldn't have a problem, but as they are in different classes, im having a huge struggle with this. Hope someone can help me, and sorry for my ignorance once again.

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  • Casting problem cant convert from void to float C++

    - by Makenshi
    as i said i get this horrible error i dont really know what to do anymore float n= xAxis[i].Normalize(); thats where i get the error and i get it cuz normalize is a void function this is it void CVector::normalize() { float len=Magnitude(); this->x /= len; this->y /= len; } i need normalize to stay as void tho i tried normal casting like this float n= (float)xAxis[i].Normalize(); and it doesnt work also with static,dynamic cast,reinterpret,const cast and cant make it work any help would be really apreciated... thank you .<

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  • Returning an integer from a select box - JavaScript

    - by Ross
    Very simply, I want to be able to access the year from the select box as an integer. In my test, my alertbox is telling me the value is undefined. <form name="form1" method="post" action=""> <label>birth year <select name="birth year" id="dueYear"> <OPTION VALUE='' SELECTED>--Year--</OPTION> <OPTION VALUE='2011'>2011</OPTION> <OPTION VALUE='2010'>2010</OPTION> <OPTION VALUE='2009'>2009</OPTION></SELECT> </select> </label> </form> <script type="text/javascript"> var dueDateYear = parseInt(document.getElementById("dueYear")); </script> <button onclick="alert(dueDateYear)">Click Me!</button> All I want it to do, is tell me the year I have selected -- any help would be appreciated, I am a newbie :(

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  • How to call a bool function...

    - by Gerri
    Hello, I did not see anything that address my particular code problem. I have a bool function in a class; the bool function is named: bool Triplet::operator ==(const Triplet& operand)const And I am trying to call it in Main but having problems just getting the call right. Apparently if I leave out any thing in the wording it gives an error that I have too few aruguments and if I try to use the entire wording of the function, I get the error that I need a semi-colon, but I already have a semi-colon at the end of the call, so I know that something else is wrong and I simply cannot figure out what is wrong! Any help would be appreciated! Thanks in advance.

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  • missing subscript c++

    - by Makenshi
    right now c++ is giving me this error: error C2087 'color' missing subscript first time i get this and i dont know what to do .< hope any1 can help me struct Color{ float r; float g; float b; };Color color[][]; and im using it here for(int i=0;i<cubes;i++) { color[i][0].r = fRand();color[i][0].g=fRand(.5);color[i][0].b=fRand(); ...etc

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