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• Best way to initialise / clear a string variable cocoa

  - by Spider-Paddy

  I have a routine that parses text via a loop. At the end of each record I need to clear my string variables but I read that someString = @"" actually just points to a new string & causes a memory leak. What is the best way to handle this? Should I rather use mutable string vars and use setString:@"" between iterations?

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• Looking for a CSS Parser in java

  - by Richard

  Hi, I'm looking for a CSS Parser in java. In particular my requirement is, for a given node/element in an HTML document, to be able to ask/get the css styles for that element from the Parser. I know there is the W3C SAC interface and one or 2 implementations based on this - but turorials/examples appear non-existant. Any help/points in rigth direction much appreciated. Thanks

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• Why is Java layout system so complicated to work with?

  - by Tom Brito

  Some points that make java swing layout system a nightmare: There's thousands of properties; Even if you learn all the properties, each layout manager ignores some properties; The only existing good RAD tool (NetBeans) does not work well; Layout managers behave different with components and containers inside it.

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• Vector Calculations in LISP

  - by abidikgubidik

  How can I perform vector calculations in lisp, such as magnitude of a vector, norm of a vector, distance (between two points), dot product, cross product, etc. Thanks.

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• iPhone - Track three touches

  - by Striker

  Suppose you have three points of contact on the iPhone screen and one of those touches moves... The touchesMoved method will be invoked and the [[event touchesForView:self] count] will be equal to '3' because there are three touches for the event, but how can you distinguish between the touches? For example - find out whether it was the first, second, or third touch which moved? Thanks.

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• how to know the direction of rotation of UIImage in iPhone

  - by suse

  hello, i want to rotate the uiimage in the direction turned, i'm able to get the angle between touchesBegan and TouchesEnd points but how should i decide whether to rotate cockwise or anti-clockwise? Plz help

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• Using Lua, check if file is a directory

  - by PeterMmm

  If i have this code local f = io.open("../web/", "r") print(io.type(f)) -- output: file how can i know f points to a directory ?

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• How can I alter the default behavior of a link to an mp3 file?

  - by Alberto

  Hi everyone! I'd like to alter the default behavior of a link that points to an mp3 file. All major browsers always open and play this mp3 file in a new window, and I'd like instead that this file be offered as a download by the browser. ¿Any Idea? Thanks!!

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• What browser incompatibilities does jquery solve?

  - by pd1138

  I'm currently on the fence about using or not using jquery. I've spent hours researching the pros and cons of using jquery (or any library for that matter). One of the big selling points of jquery is that it frees a developer from worrying about browser incompatibilities. I've tried to find any documentation on exactly which incompatibilities it overcomes. So far I haven't found any. Can anyone help me out with this.

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• Evaluating IIS7 with Virtual PC?

  - by Neil

  Hi, I wanna do some local developer tests of IIS 7 but I don't have Windows Vista, 7 or 2008 server - I currently run XP SP3. I have Virtual PC installed so I can use Microsoft's IE compatibility images - are there any time-limited images that I can use with Virtual PC so I can check out IIS 7? The IIS 7 "Try it" link points to this page. But the VHS is for Windows Server platforms only I think and I don't want an ISO? Any advice?

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• C++: Is it good practice to make getters and setters inline?

  - by Martijn Courteaux

  Hi, The title says it all. public: inline int GetValue() const { return m_nValue; } inline void SetValue(int nNewValue) { this -> m_nValue = nNewValue; } On Learn C++, they said it would run faster. So, I thought it would be great. But maybe, there are some negative points to it.

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• Best way to install web applications (e.g. Jira) on Unixes?

  - by gineer

  Can you throw some points on how it is a best way, best practice to install web application on Unixes? Like: where to place app and its bases and so for, how to configure to be secure and easy to backup, etc For example I know such suggestion -- to set uniq user for each app. App in question is Jira on FreeBSD, but more general suggestions are also welcomed.

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• How can the crosshair of ginput be restricted to one plot?

  - by Lucas

  I wrote a small MATLAB program with a gui. Inside the gui I have, among other things, a plot in which the user should be able to select two points. For this I use the function ginput, which creates a crosshair for selection. Unfortunatley the crosshair extends the whole window and is not restricted to the plot, which doesn't look nice and is confusing for the user. How can the crosshair be restricted only to the area of the plot?

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• Tool tips for custom made control using CToolTipCtrl ? (MFC)

  - by kobac

  I made a custom control derived from CWnd (a line chart) and I'm wondering if I can use CToolTipCtrl for displaying tool tips for points on the graph. If yes, how could I do that? Btw, when I move my mouse over the point, the rectangle containg string with information about values of the point, should pop up.

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• Scaling vectors from a center point?

  - by user146780

  I'm trying to figure out if I have points that make for example a square: * * * * and let's say I know the center of this square. I want a formula that will make it for eample twice its size but from the center * * * * * * * * Therefore the new shape is twice as large and from the center of the polygon. It has to work for any shape not just squares. I'm looking more for the theory behind it more than the implementation. Thanks

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• Matlab- select data from a 3d plot

  - by Li

  Hey, I have a 3d plot. I want to select a certain area in the plot and get the points within this area into a variable. Is that possible? Thanks, Li

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• C# Create "wireframe"/3D "map"

  - by Qrew

  How can I produce a similar output in C# window forms in the easiest way? Each individual points should be "editable" by pressing some keys to increment or decrement and navigate trough it with arrow keys. Is there a good library for this purpose?

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• XML Import how would you do it?

  - by Rico

  XML is used as one of our main integration points. it comes over by many clients at a time but too many clients importing at the same time can slow down our database to a crawl. Someone has to have solved a problem like this. I am basically using VB to parse through the data and import what i want and don't want. Is there a better way?

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• How to detect if device is headed towards a specific point direction

  - by Tiger

  Hi, I have my current location from CLLocation, and I have another location- also an CLLocation. I would like to detect when my device is heading towards that other location. (I can calculate the distance in meters between this points- but can't workout the calculation of an accurate angle to compare with the device current heading) Thanks.

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• standard c library for escaping a string.

  - by rampion

  Is there a standard C library function to escape C-strings? For example, if I had the C string: char example[] = "first line\nsecond line: \"inner quotes\""; And I wanted to print "first line\nsecond line: \"inner quotes\"" Is there a library function that will do that transformation for me? Rolling my own just seems a little silly. Bonus points if I can give it a length to escape (so it stops before or beyond the \0).

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• Draw and paint areas in images

  - by user281521

  Anyone knows a way to draw areas in a image, based on points, like draw areas in google maps? Dynamically with javascript. Thanks.

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• crosshair tool, is there one? Visual studio 2008

  - by flavour404

  Hi, I am doing some image sampling. What my question is, is there a 'crosshair' tool in visual studio? I want to have several instances on a single form, be able to move them around and then sample those points, obviously returning the color of the pixel at the center of the crosshair, is there already a tool that will do this, before I go and write one? Thanks, R.

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• stored procedures in scala.dbc

  - by tuxjay

  I wonder if scala.dbc supports stored procedures? The mysql jdbc backend I'm using supports it, bonus points for a code illustration to show how it works.

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• At what point in the render process of a web page can we interact with that page

  - by Bamerza

  I'd like to measure to distinct user experience points during the rendering of an HTML page: 1) Point which user sees the first painting of the page 2) Point at which user can interact with the page - meaning sees 75% of it or can actually register a button click or link click I am pretty certain these UX interactions can start before the HTML code is fully rendered, so would that instance be the JS func "OnLoad" or some other distinct measureable value/function? If it helps, we can even narrow the answer down to webkit based browsers.

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• How to get size and location of a control placed on a dialog in MFC?

  - by kobac

  I've got the pointer to the control with function CWnd* CWnd::GetDlgItem(int ITEM_ID) so i've got CWnd* pointer which points to the control, but simply can't find any method within CWnd class that will retrieve the size and location of a given control. Any help?

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