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• [C++ / NCURSES] Can't convert from 'int' to 'int *'

  - by flarn2006

  So I have these lines of code: int maxY, maxX; getmaxyx(stdscr, &maxY, &maxX); It gives me the following error: error C2440: '=' : cannot convert from 'int' to 'int *' Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast twice for each time I use it. I'm not even using the = operator! The curses.h file is included. What am I doing wrong?

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• What do people find difficult about C pointers?

  - by Paul

  From the number of questions posted here, it's clear that people have some pretty fundemental issues when getting their heads around pointers and pointer arithmetic. I'm curious to know why. They've never really caused me major problems (although I first learned about them back in the Neolithic). In order to write better answers to these questions, I'd like to know what people find difficult. So, if you're struggling with pointers, or you recently were but suddenly "got it", what were the aspects of pointers that caused you problems?

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• problems with 'free' in C

  - by lego69

  hello, can somebody please explain can I free const char* ? I allocated new memory using malloc and when I'm trying to free it I always receive an error incompatible pointer type thanks in advance something like this char* name="Arnold"; const char* str=malloc(stlen(name)+1); free(str); <- here bug

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• what is the difference between DWORD and HANDLE type in C?

  - by moon

  i have a thread with return type DWORD in c but it is then handled by a HANDLE type pointer, what is difference between these two types?

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• Debug.Assert Appears in Release Mode

  - by Ngu Soon Hui

  We all know that Debug.Assert will not be compiled into the dlls when compiled in release mode. But for some reason Debug.Assert did appear in the release version of a component I wrote. I suspect that I might have mess up my csproject setting. Any idea why Debug.Assert appears in release mode? P/S: I have double checked to make sure that I was really compiling in release mode before asking this question.

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• something like a python's triple-quote in F# (or C#)?

  - by tk

  I want to assign a xml code into a string variable. I can do this without escaping single or double-quotes by using triple-quote in python. Is there a similar way to do this in F# or C#?

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• What is the 'd' in the literal 12d called?

  - by Matthew Vines

  I feel like I should know the answer to this, but I don't. What is the type character on a numeric literal called? double myDouble = 12d; float myFloat = 10f; I wanted to find a complete list of them today, but couldn't come up with what to ask Google to search for.

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• c++, when do you need/have to pass data as (*&)

  - by ra170

  I came across people passing data objects as: declaration: DataObject * data = 0; calling it as: SomeMethod( data ); definition of Somethod: void SomeMethod(SomeObject * & object) My obvious question is, when and why do you have to do this (& *)? Is it passing the pointer as reference?

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• Default Struct Initialization in C++

  - by coryr

  Say I have a struct that looks like this (a POD): struct Foo { int i; double d; }; What are the differences between the following two lines: Foo* f1 = new Foo; Foo* f2 = new Foo();

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• Anyone know about building a custom 'relevance' search of, say, a database?

  - by Daniel

  We need to be able to do a 'sort by relevance' search of a database for our application, but Googling 'sort by relevance custom search' doesn't do much good other than seeing Google Custom Search a 1000 times. It's a Cocoa CoreData database (double alliteration) if that matters. Thanks!

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• managing IB objects without iboutlets

  - by palominoz

  i have got 24 buttons in my project.I need to manage them but I don't want to get my MainViewController polluted by 24 declarations of pointers, properties & synthesizes. i was thinking about using buttonPushed functions and do it like: -(IBAction)buttonPushed:(id)sender{ UIbutton *button=sender; [buttons addObjectAtIndex:[sender tag]]; } my question is:is sender a pointer to the IBObject?

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• how can i pass a parameter in a thread in ansi c?

  - by moon

  int NM_Generator = 1; //Aray to store thread handles HANDLE Array_Of_Thread_Handles[1]; //variable to hold handle of North pulse HANDLE Handle_Of_NM_Generator = 0; //Create NM_Generator Thread Handle_Of_NM_Generator = CreateThread( NULL, 0, NMGenerator, &dDifference, 0, NULL); if ( Handle_Of_NM_Generator == NULL) ExitProcess(NM_Generator); i want to pass a parameter double value in it how can i do so?

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• How to set css to "label for="email""

  - by Kyle Sevenoaks

  Code: <label for="email">{t _your_email}:</label> CSS: label { display: block; width: 156px; cursor: pointer; padding-right: 6px; padding-bottom: 1px; } I want to make a new CSS for the email label as it's not meant to be that wide.. Just can't think right now :P Thanks.

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• How to use substring in vbscript within a xsl page.

  - by dipesh

  I am trying to replace the double quotes in a string with a single quote, got the following code but get error message saying "Object Required strLocation" Sub UpdateAdvancedDecisions(strLocation) Dim d Dim strLLength strLLength = Len(strLocation) - 1 For d = 0 To strLLength alert strLocation strValue = strLocation.Substring(2,3) If strLocation.substring(d,d+1)=" " " Then strLLength = strLLength.substring(0, d) + "'" + strLLength.substring(d + 1,strLLength.length) Next End Sub

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• C# float to decimal conversion

  - by Adrian4B

  Any smart way to convert a float like this: float f = 711989.98f; into a decimal (or double) without loosing precision? I've tried: decimal d = (decimal)f; decimal d1 = (decimal)(Math.Round(f,2)); decimal d2 = Convert.ToDecimal(f);

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• how can i pass a parameter in a thread in ansi c windows lib can also be used?

  - by moon

  int NM_Generator = 1; //Aray to store thread handles HANDLE Array_Of_Thread_Handles[1]; //variable to hold handle of North pulse HANDLE Handle_Of_NM_Generator = 0; //Create NM_Generator Thread Handle_Of_NM_Generator = CreateThread( NULL, 0, NMGenerator, &dDifference, 0, NULL); if ( Handle_Of_NM_Generator == NULL) ExitProcess(NM_Generator); i want to pass a parameter double value in it how can i do so?

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• How to test my application With STL such as vector to make sure weather it works or not in c++?

  - by Sam

  *we release and the acquire the pointer with the Linked_ptr in parameter */ Linked_ptr& operator=(const Linked_ptr& r) { if (this != &r) { release(); acquire(r); } return *this; }

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• Qt - controlling drag behaviour

  - by bullettime

  Suppose I want my draggable widget to move differently than just staying under my cursor while being dragged. For instance, having the widget move only in one axis, or have the widget move double the distance between the cursor and the drag starting point. Which method should I override to define this kind of behaviour?

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• merging indexed array in Python

  - by leon

  Suppose that I have two numpy arrays of the form x = [[1,2] [2,4] [3,6] [4,NaN] [5,10]] y = [[0,-5] [1,0] [2,5] [5,20] [6,25]] is there an efficient way to merge them such that I have xmy = [[0, NaN, -5 ] [1, 2, 0 ] [2, 4, 5 ] [3, 6, NaN] [4, NaN, NaN] [5, 10, 20 ] [6, NaN, 25 ] I can implement a simple function using search to find the index but this is not elegant and potentially inefficient for a lot of arrays and large dimensions. Any pointer is appreciated.

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• how to access char*** from dll import in C#

  - by mavrick

  I have a function in win32 dll with signature as: void func1(int a, char*** outData) int a -- input parameter char*** outData -- output parameter - pointer to array of char strings Any idea how to access this in C# using dll import & what should be the signature.

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• Bash script if statements

  - by Jonhnny Weslley

  In Bash script, what is the difference between the following snippets? 1) Using single brackets: if [ "$1" = VALUE ] ; then # code fi 2) Using double brackets: if [[ "$1" = VALUE ]] ; then # code fi

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• prolog. recursive function returning multiple values.

  - by obtur

  I am new in Prolog. I need to declare a function which looks at a list like [[1, 0, 0], [1, 0, 0], [1, 0, 0]] and if the value is 0 returns its address(by considering it as a double array). I wrote a function basicly in the format: function(..., X) :- function(called by other values). How can I write a function, that returns a value when each times it called(recursively). May I get them (in above question) as alternative X's???

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• how can put a javascript variable in img tag

  - by ajithperuva

  I need to put a javascript variable as image source.That is my image tag should be in this format here i am adding my script document.getElementById("pricefilter").innerHTML ='' here variablename carries my image path.How can i put this in double quates.Please help to solve this

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• How to sort a Map<Key, Value> on the values in Java with google collections ordering function

  - by chris-gr

  How to sort a map(?,B) on the values in Java with google collections ordering function, if B is a class, which has a field of type double, which should be used for ordering.

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• GridBagConstraints weightx and weighty values

  - by xdevel2000

  In many books weightx and weighty values are expressed in different ways: some says 0.0 to 1.0 other says 0 to 100 other say until 1000 I'm a lot confused. In the API these variables are double types so I think the first is correct but what does it meaning a value of 0.4 or 0.7? are percentage values, point values? relative of what?

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