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• Why can't sub-packages see package private classes?

  - by Polaris878

  Okay so, I have this project structure: package A.B class SuperClass (this class is marked package private) package A.B.C class SubClass (inherits from super class) I'd rather not make SuperClass publicly visible... It is really just a utility class for this specific project (A.B). It seems to me that SubClass should be able to see SuperClass, because package A.B.C is a subpackage of A.B... but this is not the case. What would be the best way to resolve this issue? I don't think it makes sense to move everything in A.B.C up to A.B or move A.B down to A.B.C... mainly because there will probably be an A.B.D which inherits from stuff in A.B as well... I'm a bit new to Java, so be nice :D (I'm a C++ and .NET guy)

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• What's the pythonic way of declaring variables?

  - by the_drow

  Usually declaring variables on assignment is considered a best practice in VBScript or JavaScript , for example, although it is allowed. Why does Python force you to create the variable only when you use it? Since Python is case sensitive can't it cause bugs because you misspelled a variable's name? How would you avoid such a situation?

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• Good use of recursion in chess programming?

  - by JDelage

  Hi, As part of a homework assignment, I have to program a simple chess game in Java. I was thinking of taking the opportunity to experiment with recursion, and I was wondering if there's an obvious candidate in chess for recursive code? Thank you, JDelage

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• Store JsTree order back into database

  - by Scott

  Hi I am using JsTree and got some of it working with my database. Such as deleting a node, renaming a node, etc. I am having problems with saving the ROOT folders order back to the database. When I move the root folders, it doesnt save order. When I move the sub folders around, it saves order fine. Anyone know what I am doing wrong? I think it's my javascript for the onmove. here's a demo of what I am talking about. http://healthsharing.com/jstree/demo.php

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• How do you use selected vertical blocks in Visual Studio 2008 and 2010?

  - by jamesmoorecode

  I get that you can select a vertical block in Visual Studio 2008 (alt-drag), but I don't understand how you use it once it's selected. How do you: Move the selection point inside the block and have the text you're typing get inserted on every line simultaneously? Move the block one space to the right/left Or can you just copy/delete the selection? I assumed when I saw the ability to select that it was something like TextMate's vertical blocks, but maybe it's just not as advanced as that. New behavior (as of VS2010 RC - added 13 Feb 2010): You can now type in the selection and have the same thing show up on every line. Tab moves the selected block

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• pointers to functions

  - by DevAno1

  I have two basic Cpp tasks, but still I have problems with them. First is to write functions mul1,div1,sub1,sum1, taking ints as arguments and returning ints. Then I need to create pointers ptrFun1 and ptrFun2 to functions mul1 and sum1, and print results of using them. Problem starts with defining those pointers. I thought I was doing it right, but devcpp gives me errors in compilation. #include <iostream> using namespace std; int mul1(int a,int b) { return a * b; } int div1(int a,int b) { return a / b; } int sum1(int a,int b) { return a + b; } int sub1(int a,int b) { return a - b; } int main() { int a=1; int b=5; cout << mul1(a,b) << endl; cout << div1(a,b) << endl; cout << sum1(a,b) << endl; cout << sub1(a,b) << endl; int *funPtr1(int, int); int *funPtr2(int, int); funPtr1 = sum1; funPtr2 = mul1; cout << funPtr1(a,b) << endl; cout << funPtr2(a,b) << endl; system("PAUSE"); return 0; } 38 assignment of function int* funPtr1(int, int)' 38 cannot convertint ()(int, int)' to `int*()(int, int)' in assignment Task 2 is to create array of pointers to those functions named tabFunPtr. How to do that ?

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• wrong operator() overload called

  - by user313202

  okay, I am writing a matrix class and have overloaded the function call operator twice. The core of the matrix is a 2D double array. I am using the MinGW GCC compiler called from a windows console. the first overload is meant to return a double from the array (for viewing an element). the second overload is meant to return a reference to a location in the array (for changing the data in that location. double operator()(int row, int col) const ; //allows view of element double &operator()(int row, int col); //allows assignment of element I am writing a testing routine and have discovered that the "viewing" overload never gets called. for some reason the compiler "defaults" to calling the overload that returns a reference when the following printf() statement is used. fprintf(outp, "%6.2f\t", testMatD(i,j)); I understand that I'm insulting the gods by writing my own matrix class without using vectors and testing with C I/O functions. I will be punished thoroughly in the afterlife, no need to do it here. Ultimately I'd like to know what is going on here and how to fix it. I'd prefer to use the cleaner looking operator overloads rather than member functions. Any ideas? -Cal the matrix class: irrelevant code omitted class Matrix { public: double getElement(int row, int col)const; //returns the element at row,col //operator overloads double operator()(int row, int col) const ; //allows view of element double &operator()(int row, int col); //allows assignment of element private: //data members double **array; //pointer to data array }; double Matrix::getElement(int row, int col)const{ //transform indices into true coordinates (from sorted coordinates //only row needs to be transformed (user can only sort by row) row = sortedArray[row]; result = array[usrZeroRow+row][usrZeroCol+col]; return result; } //operator overloads double Matrix::operator()(int row, int col) const { //this overload is used when viewing an element return getElement(row,col); } double &Matrix::operator()(int row, int col){ //this overload is used when placing an element return array[row+usrZeroRow][col+usrZeroCol]; } The testing program: irrelevant code omitted int main(void){ FILE *outp; outp = fopen("test_output.txt", "w+"); Matrix testMatD(5,7); //construct 5x7 matrix //some initializations omitted fprintf(outp, "%6.2f\t", testMatD(i,j)); //calls the wrong overload }

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• Center the stage in Flash CS4/AS3 on a standalone player

  - by Technoh

  I have a Flash presentation (made in Flash CS4 with AS3) I am working on and running in a standalone Flash player. When I start the presentation the stage is centered in the Flash player, even if I resize it. The presentation contains an FLVPlayback component which, at different frames, plays different content. A navigation menu (made of buttons) is used to move through the different frames. My problem is that if the player is resized so that it is bigger than the stage, sometimes after going into and exiting from fullScreen mode, the stage is moved to the left and I cannot find a way to move it back to the center. I cannot stage the scale as the content becomes distorted and I do not want to force fullScreen all the time. I would just like to center the stage in the Flash player. Is such a thing possible? Any help is greatly appreciated.

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• unit, integration and system tests for PHP applications

  - by Sara

  Hi, We were given an assignment to develop a prototype for a customer community. It was suggested PHP as the programming language. (but we're not supposed to actually code it, just a prototype with documentation is required) I'm wondering what are the best practices/ tools used in Unit testing, Integration Testing and System testing for such a php app Thanks

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• Future proofing client-server code?

  - by Koran

  Hi, We have a web based client-server product. The client is expected to be used in the upwards of 1M users (a famous company is going to use it). Our server is set up in the cloud. One of the major questions while designing is how to make the whole program future proof. Say: Cloud provider goes down, then move automatically to backup in another cloud Move to a different server altogether etc The options we thought till now are: DNS: Running a DNS name server on the cloud ourselves. Directory server - The directory server also lives on the cloud Have our server returning future movements and future URLs etc to the client - wherein the client is specifically designed to handle those scenarios Since this should be a usual problem, which is the best solution for the same? Since our company is a very small one, we are looking at the least technically and financially expensive solution (say option 3 etc)? Could someone provide some pointers for the same? K

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• Slow motion tween text isn't smooth

  - by Alex

  Hi! i have to create a movie where a text string move in horizontal. the problem is that in the movie (800px wide) the text should go from right to left in about 7 seconds (so it have to go about 400px to the left in 7 sec). i created a motion-tween with ease for my "text" and the tween is long (at 30fps) 30*7=210 frames. the result is that the text DON'T MOVE FLUID... it's not a uniform movement... it's too visible the fact that it moves X pixel each x frames. it's the exact opposite of SMOOTH MOVEMENT. How can i obtain a smooth slow-motion text movement?

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• "Sketch" mockup tool that supports hyperlinking?

  - by Gayle

  Balsamiq Mockup is nice, but I'd like something similar that could produce something that I could distribute to clients that would allow them to click on elements and move between the mockups. Not looking for any fancy navigation - just the ability to move from on screen to the other based on what it click - like "hyperlinked regions". I find that end-users often find it difficult to understand the flow of the application from a set of static mockups. I really like the "hand-drawn" look as it stops end-users focusing on the detail too early, so I want something with that kind of feel. Does Sketchflow provide this kind of functionality? Are there other tools that provide what I'm looking for?

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• What are programming lost arts?

  - by pavpanchekha

  Have you ever programmed raw machine code (not for class)? Examined a hex dump with just a hex editor (or, heck, without)? Written your own software floating-point library? Division library? Written a non-school-assignment in Lisp or Forth? What sort of "lost arts" have been forgotten? And what reason (if any) would there be to resurrect them?

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• Reliable UDP

  - by suresh

  How can I develop a Linux kernel module in order to make UDP reliable? This is my college assignment and I don't how to proceed. how to do change the default UDP behaviour in linux kernel by loading a new kernel module? and how to program such kernel module?

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• Working with operator[] and operator=

  - by calebthorne

  Given a simple class that overloads the '[ ]' operator: class A { public: int operator[](int p_index) { return a[p_index]; } private: int a[5]; }; I would like to accomplish the following: void main() { A Aobject; Aobject[0] = 1; // Problem here } How can I overload the assignment '=' operator in this case to work with the '[ ]' operator?

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• Is returning by rvalue reference more efficient?

  - by Neil G

  for example: Beta_ab&& Beta::toAB() const { return move(Beta_ab(1, 1)); }

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• A strange problem using jquery in IE6.

  - by Tony

  I am using jquery load method to update divs , it works great until I test my code under IE6. The problem is : under IE6 , when I click a button to trigger a load method , the page is remaining unchanged until I move my cursor, that means if I click my mouse and keep my hand away from the mouse , the page is unchanged , if I move the mouse , the page is updated. This problem is only occurred under IE6 . IE7 , IE8, Firefox all have no problem. Have you guys ever encountered this kind of problem ?

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• Convert a .NET long to an unsigned 8-byte integer

  - by Ben Aston

  For the purposes of setting a value in Active Directory I would like to convert a long to an unsigned 8-byte integer, for assignment to an AD property. How can I do this?

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• Please help me to create a insert query (error of foreign key constrant)

  - by Rajesh Rolen- DotNet Developer

  I want to move data from one database's table to another database's table its giving me foreign key error. please tell me how can i insert all those data which is valid except those rows who have error of foreign key. i am using sql server 2005 My query is : SET IDENTITY_INSERT City ON INSERT INTO City ([cityid],[city],[country],[state],[cityinfo] ,[enabled],[countryid],[citycode],[stateid],[latitude],[longitude]) SELECT [cityid],[city],[country],[state],[cityinfo] ,[enabled],[countryid],[citycode],[stateid],[latitude],[longitude] FROM TD.DBo.City getting this error: The INSERT statement conflicted with the FOREIGN KEY constraint "FK__city__countryid__3E52440B". The conflict occurred in database "schoolHigher", table "dbo.country", column 'countryId'. please tell how can i move those data whose foreign key is valid.

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• Flex: Would a computational engine for a Connect-4 type game be too slow?

  - by Robusto

  OK, I was just fooling around in my spare time and have made this cool interface and game-playing code for a Connect-4 type game, written in Flex and playable by 2 human players in Flash. It accurately detects wins, etc. I'm smart enough to know that I've done the easy part. Before I dig into an AI for game play, I wanted to ask if this is the kind of thing that can really be handled computationally by a Flash plugin. It seems to me that for every turn up until the end there are 8 possible moves, 8 responses to each move, etc. So wouldn't a perfect engine have to be able to potentially see 8^8 moves (over 16 million), and a fairly good engine see up to a million? I don't know game coding so this is new to me. What's a reasonable move horizon for such a game to be able to see?

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• scoping problem in recursive closure

  - by wiso

  why this work: def function1(): a = 10 def function2(): print a function2() but this not: def function1(): a = 10 def function2(): print a a -= 1 if a>0: function2() function2() error: UnboundLocalError: local variable 'a' referenced before assignment

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• Want to bind an input field to a jquery-ui slider handle

  - by BFTrick

  hello, I want to bind an input field to the jquery-ui slider handle. So whenever one value changes I want the other value to also change. Ex: if someone types 1000 into the minimum value input field I want the lower slider handle to move to the 1000 mark. Also if the user drags the lower slider handle to 1000 the input field should reflect that. Making the slider reflect the changes in the input field is easy: $(minYearInput).blur(function () { $("#yearSlider").slider("values", 0, parseInt($(this).val())); }); $(maxYearInput).blur(function () { $("#yearSlider").slider("values", 1, parseInt($(this).val())); }); I just need help making the text fields mimic the slider. $("#yearSlider").slider({ range: true, min: 1994, max: 2011, step: 1, values: [ 1994 , 2011 ], slide: function(event, ui) { //what goes here? } }); Any ideas? A similar question from this site: http://stackoverflow.com/questions/1330008/jquery-ui-slider-input-a-value-and-slider-move-to-location

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• assign a xaml file in a frame source dynamically

  - by ashishtripathi.hcu

  I have this code in a xaml file now in a event handler code i want to assign a xaml file in a frame source dynamically the code in xaml file is .. here this assignment of source is working but how to do that in a .cs file. ProjectTab.Sourse=???

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• `var = something rescue nil` behaviour

  - by JP

  In ruby you can throw a rescue at the end of an assignment to catch any errors that might come up. I have a function (below: a_function_that_may_fail) where it's convenient to let it throw an error if certain conditions aren't met. The following code works well post = {} # Other Hash stuff post['Caption'] = a_function_that_may_fail rescue nil However I'd like to have post['Caption'] not even set if the function fails. I know I can do: begin post['Caption'] = a_function_that_may_fail recsue end but that feels a little excessive - is there a simpler solution?

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• Android ==> Simple 2d Animation ???

  - by aryaxt

  public void MoveMyButton (int x) //where the button suppose to move to { TranslateAnimation anim=new TranslateAnimation(this.getLeft() ,x, this.getTop() ,20)); anim.setFillAfter(true); anim.setDuration(1000); this.setAnimation(anim); anim.start(); } button's x at start is 1. I call the method to move it to 100, and it goes from 1 to 100 I call it to go to 200, and it goes from 1 to 200, instead of 100 to 200 Is there any way to make the animation to save the location of the button as it animates it? Thanks

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