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• Garbage Collection leak? Scripting Bridge leak?

  - by Y.Vera

  Hello everyone! I'm always really picky about memory leaks and I cannot understand why my garbage collected application leaks. My code is entirely memory-managed and it runs great without garbage collection, not a single leak. However, as soon as I turn on garbage collection it leaks! Just to prove a point, why does this leak in a garbage collected app? (place this dummy code at applicationDidFinishLaunching:) NSOpenPanel *panel = [NSOpenPanel openPanel]; [panel beginSheetModalForWindow:window completionHandler:^(NSInteger result) {NSBeep();}]; Also, is there a way to prevent leaks in apps (garbage collected or otherwise) that use Scripting Bridge? it seems as if they all leak, even the sample ones in xcode. Thanks everybody!

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• Replace input type=file by an image

  - by nikospkrk

  Hi, Like a lot of people, I'd like to customize the ugly input type=file, and I know that it can't be done without some hacks and/or javascript. But, the thing is that in my case the upload file buttons are just for uploading images (jpeg|jpg|png|gif), so I was wondering if I could use a "clickable" image which would act exactly as an input type file (show the dialog box, and same $_FILE on submitted page). I found some workaround here, and this interesting one too (but does not work on Chrome =/). What do you guys do when you want to add some style to your file buttons? If you have any point of view about it, just hit the answer button ;) Cheers, Nicolas

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• Does Google provide any Android tutorials that teach how to implement a Service?

  - by Bub

  I apologize in advance for the "newbie" nature of this question. Here is my predicament: I'm brand new to android and developing in general. I'm using android's SDK with eclipse Galileo. I've followed several tutorials to create different layouts. I've even learned recently how to use radio buttons and verify which ones were selected. Now I need to create a service that downloads and updates an xml file within the application. I've tried to locate a simple tutorial for services on Google's developer site but so far, so bad. If they exist could somebody point me in the right direction? On the other hand, I've been told Google's tutorials are a little out dated. Is that true? If so, are there any other tutorials that would hand-hold (and possibly over-explain) how to use a service to a true newbie for free (like google)? Any suggestions would be appreciated.

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• Creating a foreign key in MySQL produces error:

  - by SnOrfus

  I'm trying to create a foreign key on a table in MySQL and I'm getting a strange error that there seems to be little info about in any of my searches. I'm creating the key with this (emitted from mysql workbench 5.2): ALTER TABLE `db`.`appointment` ADD CONSTRAINT `FK_appointment_CancellationID` FOREIGN KEY (`CancellationID` ) REFERENCES `db`.`appointment_cancellation` (`ID` ) ON DELETE NO ACTION ON UPDATE NO ACTION , ADD INDEX `FK_appointment_CancellationID` (`CancellationID` ASC) ; at which point I get the error: ERROR 1452: Cannot add or update a child row: a foreign key constraint fails (alarmtekcore., CONSTRAINT FK_lead_appointment_CancellationID FOREIGN KEY (CancellationID) REFERENCES lead_appointment_cancellation (`) I've checked here but there's no data in the table.

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• Scrum metrics for quality

  - by zachary

  What is the best way to measure QA in scrum? We have members who typically test and they are measured against how many bugs they find. If they don't find any bugs then they are considered to be doing a bad job. However, it is my understanding that the developers and quality people are considered one in the same. I would think that they should be judged against the same metrics... not different metrics then the developers who may also be doing testing work... What is the best way to handle metrics for QA and should QA people have separate metrics from developers in scrum? Any documents or links someone can point me to in regards to this?

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• Git: How to find all commits in branch A that originated in derived branch B merged back into A?

  - by Michael Ludwig

  In Git, given (1) a branch A and (2) a branch B derived from A at some point in the past and then merged back into A, how can I find all the commits now in A that originated in B? The intent is to identify the changeset of work performed in B now in A to more quickly track down issues. A squash commit would obviously and conveniently pack the entire changeset in one commit for easy reference, but the drawbacks (such as loss of information and individual attributability) make this option undesirable for us. Hence my question.

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• Pointer-based binary heap implementation

  - by Derek Chiang

  Is it even possible to implement a binary heap using pointers rather than an array? I have searched around the internet (including SO) and no answer can be found. The main problem here is that, how do you keep track of the last pointer? When you insert X into the heap, you place X at the last pointer and then bubble it up. Now, where does the last pointer point to? And also, what happens when you want to remove the root? You exchange the root with the last element, and then bubble the new root down. Now, how do you know what's the new "last element" that you need when you remove root again?

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• killing a separate thread having a socket

  - by user311906

  Hi All I have a separate thread ListenerThread having a socket listening to info broadcasted by some remote server. This is created at the constructor of one class I need to develop. Because of requirements, once the separate thread is started I need to avoid any blocking function on the main thread. Once it comes to the point of calling the destructor of my class I cannot perform a join on the listener thread so the only thing I can do is to KILL it. My questions are: what happens to the network resoruces allocated by the function passed to the thead? Is the socket closed properly or there might be something pending? ( most worried about this ) is this procedure fast enough i.e. is the thread killed so that interrupt immediately ? I am working with Linux ...what command or what can I check to ensure that there is no networking resource left pending or that something went wrong for the Operating system I thank you very much for your help Regards MNSTN NOTE: I am using boost::thread in C++

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• Add a listener inside or outside get method

  - by James P.

  I'm learning Swing and have composed an interface using a series of get methods to add components. Is it a good practise to add a Listener inside a get method as follows? I'd like to make things as decoupled as possible. private JButton getConnectButton() { if (connectButton == null) { connectButton = new JButton(); connectButton.setText("Connect"); connectButton.setSize(new Dimension(81, 16)); connectButton.setLocation(new Point(410, 5)); connectButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { // actionPerformed code goes here } }); } return connectButton; }

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• How Do I get the current instance from an AppDomain?

  - by Spanners

  Hi, I use the default appdomain (AD) which I use to create new appdomains (AD1) when required for running plugins in isolation. When creating the new domain I also wire up the AppDomainUnload event to allow me to call clean up code etc. The issue I seem to have is: 1) Create AD1 from AD 2) Run code in AD1 3) Call AD.Unload(AD1) The code switches to AD1 and calls the unloading event passing in a reference to the current AppDomain (AD1). At this point I'd like to get a reference to the current instance running in AD1 to call a shutdown method however there is no GetInstance on the AppDomain class. Any ideas how I can go about getting it?

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• Dynamically/recursively building hashes in Perl?

  - by Gaurav Dadhania

  I'm quite new to Perl and I'm trying to build a hash recursively and getting nowhere. I tried searching for tutorials to dynamically build hashes, but all I could find were introductory articles about hashes. I would be grateful if you point me towards the right direction or suggest a nice article/tutorial. I'm trying to read from a file which has paths in the form of one/two/three four five/six/seven/eight and I want to build a hash like VAR = { one : { two : { three : "" } } four : "" five : { six : { seven : { eight : "" } } } } The script I'm using currently is : my $finalhash = {}; my @input = <>; sub constructHash { my ($hashrf, $line) = @_; @elements = split(/\//, $line); if(@elements > 1) { $hashrf->{shift @elements} = constructHash($hashrf->{$elements[0]}, @elements ); } else { $hashrf->{shift @elements} = ""; } return $hashrf; } foreach $lines (@input) { $finalhash = constructHash($finalhash, $lines); }

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• WPF with code only

  - by rwallace

  I've seen a lot of questions about the merits of WPF here, and essentially every answer says it's the bee's knees, but essentially every answer also talks about things like XAML, in many cases graphic designers and Expression Blend etc. My question is, is it worth getting into WPF if you're a solo coder working in C# only? Specifically, I don't have a graphic designer, nor any great talent in that area myself; I don't use point-and-click tools; I write everything in C#, not XML. Winforms works fine in those conditions. Is the same true of WPF, or does it turn out that important functions can only be done in XAML, the default settings aren't intended for actual use and you have to have a graphic designer on the team to make things look good, etc., and somebody in my position would be better off to stick to Winforms?

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• Django User "per project" group assignation

  - by Ben G

  Hi, Here's my problem : my site has users, which can create projects, and access other user's projects. Each project can assign different rights to users. So, i could have Project A : user "John" is in group "manager" , and Project "B" user "John" is in group "worker". How could I use the Django User authentication model to do that ? From a SQL point a view, what i would like is to be able to add "project_id" in the primary key for the "auth_user_groups" table. I don't think profile is of any help here. Any advice ? UPDATE : "worker" and "manager" are just two examples of the permission group (or "roles") that my application defines. There will be more in the future. Eg : i will probably also have "admin", "reporting", etc...

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• GIS: line_locate_point() in Python

  - by miracle2k

  I'm pretty much a beginner when it comes to GIS, but I think I understand the basics - it doesn't seem to hard. But: All these acronyms and different libraries, GEOS, GDAL, PROJ, PCL, Shaply, OpenGEO, OGR, OGC, OWS and what not, each seemingly depending on any number of others, is slightly overwhelming me. Here's what I would like to do: Given a number of points and a linestring, I want to determine the location on the line closest to a certain point. In other words, what PostGIS's line_locate_point() does: http://postgis.refractions.net/documentation/manual-1.3/ch06.html#line%5Flocate%5Fpoint Except I want do use plain Python. Which library or libraries should I have a look at generally for doing these kinds of spatial calculations in Python, and is there one that specifically supports a line_locate_point() equivalent?

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• Beginners PHP e-mail problem

  - by Reg H

  I'm working on my first PHP project, and it's going well. I've been able to figure out how to do most of what I need so far, but there's one big problem for me now: E-mail. I'm on a shared server, so I can't install PEAR, and I can't modify my php.ini. According to my host's very limited documentation, I have to use SMTP so I can't (correct me if I'm wrong) use the mail() function. So does anyone have any suggestions on what to do? At this point I just want to send a basic text message, so where would I specify my SMTP port number, user, password and so on? Thanks

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• setting up a private network using linksys router

  - by user287745

  scenerio:- a database server running sql server 2005 and sql server management studio 2005 express editions a web server running IIS 5.0v using windows xp pro. two other computer having windows xp and windows 98 i have a linksys router which i use to access point for wireless (laptop) there are 5 sockets behind it four for clients and one for internet. i would like to setup a LAN- something like a private hosting area with two clients. would should i do? where to connect what and what would the changes in settnigs be. right now it uses dhcp or something to assign ips. where will the webserver be attached to the internet socket? where will the db server be attached? any guide, links, help thank you

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• How to nest a Location directive inside a virtual host config?

  - by Josh

  I am trying nest a Location directive inside a virtual host config like this: <VirtualHost *:80> ServerName mysite.com DocumentRoot /home/deployer/apps/mysite/current/public ErrorLog /var/log/prod.log <Location "/shop"> DocumentRoot /home/deployer/apps/mysite_shop/current/public ErrorLog /var/log/prod.log </Location> </VirtualHost> What I want to do is go to mysite.com/shop, and point it to another application. Is this possible? Is there another method of doing this? I get an error because apparently Location directives do not accept DocumentRoot. Thanks.

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• JavaScript OnClick Handler Not Invoking

  - by potatolicious

  I'm calling a javascript function in an inline onclick like so: <a href="#" onclick="removeAttribute('foo', 'bar');">Some Link</a> When I click on the link, though, nothing happens. I have other links (to other functions) tied to onclicks that work fine elsewhere on the same page. All links to this "removeAttribute" function fail. There are no errors in Firebug, and the onclick event handler is being invoked - but stepping into the removeAttribute function ends up, for some reason, somewhere in jQuery.js. At no point does removeAttribute ever get called. If I do: javascript:removeAttribute('foo', 'bar'); in Firefox's address bar. The function is called successfully. Anyone seen this?

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• Memory address of a variable

  - by dotnetvoyager

  Hi Everyone, Is it possible to get the memory address of a variable in C#. What I am trying to do is very simple. I want to declare variables of type Double, Float, Decimal and assign the value 1.1 to each of these variables. Then I would like to go and see how these values are represented in memory. I need to get the memory address of the variable in order to see how its stored in memory. Once I have the memory address I plan to put a break point in the code and use the Debug - Windows - Memory option in visual studio to see how the numbers are stored in memory. Cheers,

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• Deploying with Capistrano & Subversion. Working copy locked

  - by Rimian

  I'm deploying to a Debian server with Capistrano which fails due to locked a working copy. I narrowed it down to this: svn checkout http://myrepo.net/mysite/tags/1.0 /var/www/mysite/releases/1234 So if I run: cap invoke COMMAND='svn checkout http://myrepo.net/mysite/tags/1.0 /var/www/mysite/releases/1234' I get an error: svn: Working copy '/var/www/mysite/releases/1' locked Clean up makes no difference. The same command runs fine from the server. When I list the files in 1234/ I can see all the .svn and working copy files. Can someone please point me in the right direction to resolve this? How do I tell if the working copy is really locked? svn status shows nothing...

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• Microsoft Access to SQL Server - synchronization

  - by David Pfeffer

  I have a client that uses a point-of-sale solution involving an Access database for its back-end storage. I am trying to provide this client with a service that involves, for SLA reasons, the need to copy parts of this Access database into tables in my own database server which runs SQL Server 2008. I need to do this on a periodic basis, probably about 5 times a day. I do have VPN connectivity to the client. Is there an easy programmatic way to do this, or an available tool? I don't want to handcraft what I assume is a relatively common task.

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• Python / Django : emulating a multidimensionnal layer on a mySql database

  - by Sébastien Piquemal

  Hi, I'm working on a Django project where I need to provide a lot of different visualizations on the same data (for example average of a value for each month, for each year / for a location, etc ...). I have been using OLAP database once in college, and I thought that it would fit my needs, but it appears that it is much to heavy for what I need. Actually the volume of data is not very big, so I don't need any optimization, just a way to present different visualizations of the same data without having to write 1000 times the same code. So let's recap : I need a python library : to emulate a multidimensional database (OLAP style would be nice because I think it is quite convenient : stat structure, and everything) non-intrusive, because I can't modify anything on the existing mysql database easy-to-use, because otherwise there's no point in replacing some overhead by another.

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• Which is better: string html generation or jquery DOM element creation?

  - by Ed Woodcock

  Ok, I'm rewriting some vanilla JS functions in my current project, and I'm at a point where there's a lot of HTML being generated for tooltips etc. My question is, is it better/preferred to do this: var html = '<div><span>Some More Stuff</span></div>'; if (someCondition) { html += '<div>Some Conditional Content</div>'; } $('#parent').append(html); OR var html = $('<div/>').append($('<span/>').append('Some More Stuff')); if (someCondition) { html.append($('<div/>').append('Some conditionalContent'); } $('#parent').append(html); ?

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• ASP.NET MVC, JSON & non JavaScript clients

  - by redsquare

  I need to ensure that an application I am developing is accessable and also works with JavaScript turned off. I just need a pointer to assist with the following. I had 3 'chained' select boxes and I wanted JavaScript enabled clients to have a nice Ajax experience. I can easily write the required functionality to populate the chained boxes on the change event of the preceeding select using jQuery and JSON with a WCF service. However what about the non JavaScript client? Would I wrap a submit next to the select and place these inside their own form to post back with a certain action or different querstring parameter? Can the same controller give me a partial JSON response as well as feeding the full HTML response. Can anyone point me to a good demo that utilises both JSON and normal HTTP posts to produce the same result in ASP.NET MVC. All ASP.NET MVC demo/examples I see forget about the non JavaScript enabled client.

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• Dealing with passwords securely

  - by Krt_Malta

  Hi I have a Java web service and a Java web client making use of this service. One of the functions is to create a new user account. My two concerns are: How will I send the user's password securely from the client. How will I store the user's password securely on the server. How can I achieve these? I know the theory basically behind security, security algorithms etc but can anyone give me some advice on how I should go about in coding? Could anyone point me to some good (and if possible not complicated) examples to follow since I found some examples on the Internet very contorted? Thanks a lot and regards, Krt_Malta

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