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• font-smoothing not applied to buttons

  - by David

  I have used this snippet to prevent webkit from changing antialiasing when using CSS transforms: html{ -webkit-font-smoothing: antialiased; } This works fine for most cases, however I noticed some weirdness in chrome when playing around with Bootstrap using this HTML: <button class="btn btn-inverse">John Doe</button> <a class="btn btn-inverse">John Doe</a>? This is how it looks in OSX/Chrome: Fiddle: http://jsfiddle.net/hY2J7/. In fact, it seems that it is not applied to buttons at all. Is there a safer technique to trigger the same antialiasing in webkit for all elements?

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• Pasting non-text data into browser-based apps

  - by John

  Imagine I want a user to be able to copy-paste a selection of pixels from MSPaint into a browser-based app. Is this possible using JavaScript in any current browsers? Will it become possible in HTML5? If not, is it feasible using something like Flex/Silverlight, or is it simply not possible at this time, and you'd have to save a file and manually upload it?

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• Small questions on data structure

  - by John Graveston

  Hi, I'm trying to search the parent of a node with Kruskal's algorithm. My program works just fine, but I think I have heard of a method to improve the speed of the algorithm by reconstructing the tree while searching for the parent node and connecting it to the parent node. I'm pretty sure that I've heard of this somewhere, maybe in a lecture. Can anyone refresh my memory? And also, given a number of arrays, when searching for the minimum and the maximum value from a certain section of an array, what is the name of the tree that can calculate the minimum/maximum value from the array by making a binary tree that has the minimum/maximum value of each array in O(log N)?

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• What's the best way to do Ruby gemspec creation and dependency management?

  - by John Feminella

  Over the last few months, there have been a number of rapid developments in the state of Ruby dependency management and gem creation, to the point where I've been having trouble keeping up with everything. If I'm writing a new gem, what's the best tool for me to use to create my gemspec? Are there disadvantages of using this tool over competitors? I've used Bundler a few times on applications and for me it's been a lifesaver. Is the consensus that it is suitable for use with production apps? Are there quirks or idiosyncracies people should be aware of? Links to resources you've used and have found helpful would also be much appreciated.

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• Usage of peripherals (special hardware) to make programming more efficient?

  - by John M

  Outside the standard mouse/keyboard combination are there any other peripherals that you use to make you programming more efficient? One option that I have considered is using AutoHotKey to script the buttons on a Logitech Wingman to run different functions/keystrokes that are not available on the keyboard.

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• Why is my SSH session timing out in less than a minute?

  - by John Smith

  Within a minute of connecting to my remote Linux server through SSH, my session times out and I cannot contact the server until a few seconds have passed. Meanwhile, I'm connected to other servers without interruption. This is only happening when I establish connection from an hotel wireless AP. When I connect from my phone's Internet, the problem does not occur. Does anyone know what might be causing these unusual timeouts?

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• Binding to element in WPF: can the Path expression do math?

  - by John

  Hi I'm trying to bind a control to the parent's Height/width property using ElementName and a Path. However, I don't want to bind to the actual height, but to exactly half the height. Can the Path expression do the math? e.g. Path={ActualHeight/2} I couldn't find a way to do that. IS there any other clever approach? Thanks!

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• [Win32/MFC] Making group-boxes contain things

  - by John

  As I understand it, a group-box is just another control. Controls inside it are not owned by it, so unlike in Winforms, if you move a group-box the contained controls stay put. What would be the nicest way to address this? Just create your own data-structure mapping controls to 'container' group-boxes so that when the container is moved the children are automatically moved?

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• [C++] Is it possible to roll a significantly faster version of sqrt

  - by John

  In an app I'm profiling, I found that in some scenarios this functions are able to take over 10% of total execution time. I've seen discussion over the years of faster sqrt implementations using sneaky floating-point trickery, but I don't know if such things are outdated on modern CPUs. MSVC++ 2008 compiler is being used, for reference... though I'd assume sqrt is not going to add much overhead though.

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• python dict.fromkeys() returns empty

  - by slooow

  I wrote the following function. It returns an empty dictionary when it should not. The code works on the command line without function. However I cannot see what is wrong with the function, so I have to appeal to your collective intelligence. def enter_users_into_dict(userlist): newusr = {} newusr.fromkeys(userlist, 0) return newusr ul = ['john', 'mabel'] nd = enter_users_into_dict(ul) print nd It returns an empty dict {} where I would expect {'john': 0, 'mabel': 0}. It is probably very simply but I don't see the solution.

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• Optimal way to initialize varying objects

  - by John Smith

  I have to initialize a lot of different types of objects based on an integer parameter. They all have the same overall initialization methods. At the moment I have the following code #def APPLE 1 #def PEAR 2 switch (t) { case APPLE: newobj = [[FApple alloc] init]; break; case PEAR: newobj = [[FPear] alloc] init]; break; default: retobj = nil; } I believe there must be a better way to do this. When I add FOrange I have to go and add another line here. What would be a better way?

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• Adapting Map Iterators Using STL/Boost/Lambdas

  - by John Dibling

  Consider the following non-working code: typedef map<int, unsigned> mymap; mymap m; for( int i = 1; i < 5; ++i ) m[i] = i; // 'remove' all elements from map where .second < 3 remove(m.begin(), m.end(), bind2nd(less<int>(), 3)); I'm trying to remove elements from this map where .second < 3. This obviously isn't written correctly. How do I write this correctly using: Standard STL function objects & techniques Boost.Bind C++0x Lambdas I know I'm not eraseing the elements. Don't worry about that; I'm just simplifying the problem to solve.

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• How can I delete a file in Sinatra after it has been sent via send_file?

  - by John Reilly

  I have a simple sinatra application that needs to generate a file (via an external process), send that file to the browser, and finally, delete the file from the filesystem. Something along these lines: class MyApp < Sinatra::Base get '/generate-file' do # calls out to an external process, # and returns the path to the generated file file_path = generate_the_file() # send the file to the browser send_file(file_path) # remove the generated file, so we don't # completely fill up the filesystem. File.delete(file_path) # File.delete is never called. end end It seems, however, that the send_file call completes the request, and any code after it does not get run. Is there some way to ensure that the generated file is cleaned up after it has been successfully sent to the browser? Or will I need to resort to a cron job running a cleanup script on some interval?

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• [MS-DOS] Read command-line parameters to .bat from file

  - by John

  I have a build.bat file which uses %1 internally... so you might call: build 1.23 I wanted it to read the parameter from a separate file, so I tried putting "1.23" in version.txt and doing: build < version.txt But it doesn't work. Isn't this how piping works? Is what I want possible and if so how?

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• Function to set an auth_token

  - by john mossel

  In my form I have a hidden field: <input type="hidden" name="auth_token" value="<?php echo $auth_token; ?>"> This value is also stored in a session and a variable: $_SESSION['auth_token'] = hash('sha256', rand() . time() . $_SERVER['HTTP_USER_AGENT']); # TODO: put this in a function $auth_token = $_SESSION['auth_token']; When the form is submitted the two values are compared. It's a basic form token. Should this be made into two functions or just one when refactored? set_form_token() and get_form_token(), get_form_token() returning the session value, then I can compare it in my main code. What is the proper way of doing this?

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• Localizing validation (error) messages in Grails

  - by John

  Hi, I try to localize error messages from the Domain classes. This is possible with the default error messages, e.g.: default.blank.message=Property [{0}] cannot be blank and localized attribute names, e.g.: customer.address.label=Customer address Where "Customer" is my domain class and address is its attribute. My problem is that I can't localize some attributes because I need specific error messages. E.g: has.to.be.a.number=Property [{0}] has to be a number contingent.size.label=Contingent size. But the message I get is "Property [size] has to be a number" instead of "Property [Contingent size] has to be a number". The messages I cant localize are following: - Property [{0}] has to be a number - Property [{0}] has to be a valid date // I can't use g:datePicker in this context

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• Using * Width & Precision Specifiers With boost::format

  - by John Dibling

  I am trying to use width and precision specifiers with boost::format, like this: #include <boost\format.hpp> #include <string> int main() { int n = 5; std::string s = (boost::format("%*.*s") % (n*2) % (n*2) % "Hello").str(); return 0; } But this doesn't work because boost::format doesn't support the * specifier. Boost throws an exception when parsing the string. Is there a way to accomplish the same goal, preferably using a drop-in replacement?

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• Programming in a noisy office [closed]

  - by John Isaacks

  Can anyone recommend any techniques or advice for working in a noisy office? I know some people wear headphones and listen to music but I prefer silence. I work in a room with 4 others, there are no walls between us, we just each have our own desk. There is usually always someone talking, or on the phone, or on the intercom. Has anyone else had to deal with this? What did you do? What would you recommend?

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• Add text into a desktop application

  - by John

  Hello, I would like to come up with a simple application that would add a specific phrase into a specific location on a desktop application. I assume this isn't very hard, but I'm kind of new. Any help?? Thanks!

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• What is a Custom Class?

  - by John Saunders

  Many questions here on SO ask about custom classes. I, on the other hand, have no idea what they're talking about. "Custom class" seems to mean the same thing I mean when I say "class". What did I miss, back in the '80s, that keeps me from understanding? I know that it's possible to purchase a packaged system - for Accounting, ERP, or something like that. You can then customize it, or add "custom code" to make the package do things that are specific to your business. But that doesn't describe the process used in writing a .NET program. In this case, the entire purpose of the .NET Framework is to allow us to write our own code. There is nothing useful out of the box.

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• Should multiple regional websites all use the same database?

  - by John Himmelman

  I'm developing a cms for a company that has multiple regional sites (us, uk, china, russia, etc..). Should I use a separate database for each of these sites or use a single database with a 'site' field in each table? My main concern is the table language encoding (ie, can storing strings in different langauges in the same table cause problems, such as sorting issues).

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• Does Android 2.1's Browser Support HTML 5 and What Video Format Does It Play?

  - by John Giotta

  The company I work for produces allot of video and we want to target as many devices as possible, but the question came up of what does the Android do? I personally own an Android based phone running 2.1, but I can't seem to get the HTML 5 tag to work. Even when I can trigger the browser to playback the video it just throws a notification error that it can't. Are there guidelines to producing Android/HTML 5 compatible videos? Is it truly supported?

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• What's the right way to show a non-modal child dialog in MFC (VS2005)?

  - by John

  Rather than have everything in one big dialog, I'm looking at being able to display child dialogs for separate groups of controls. The idea is these are not free-floating child dialogs like floating toolbars, but would be shown with no title-bar, their position locked to the parent dialog... so as you drag the parent dialog any open child is dragged too. NOTE: these child windows are not inside the parent dialog, they would typically be 'glued' to the edge of it. In MFC/VC++ 2005, what's the best way to do this? For testing, I currently have a standard MFC Dialog-based app setup with CMainDlg, and I've then created a 'widget dialog' CWidgetDlg. So far I've got a member variable CWidgetDlg MainDlg::m_Widget and a button on CMainDlg with a handler like CMainDlg::OnDisplayWidgetBtn() { m_Widget.ShowWindow(TRUE); } But of course m_Widget hasn't got a HWND setup, and I am trying to remember the right way to do this? For dialog controls I can use DDX but what about child dialogs? And is this a reasonable approach, or is there a nicer, more automated way?

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• What's the most efficient way to repeatedly remove leading text using Vim?

  - by John Topley

  What's the most efficient way to remove the text 2010-04-07 14:25:50,773 DEBUG This is a debug log statement - from a log file like the extract below using Vim? 2010-04-07 14:25:50,772 DEBUG This is a debug log statement - 9,8 2010-04-07 14:25:50,772 DEBUG This is a debug log statement - 1,11 2010-04-07 14:25:50,772 DEBUG This is a debug log statement - 5,2 2010-04-07 14:25:50,772 DEBUG This is a debug log statement - 8,4 This is what the result should look like: 9,8 1,11 5,2 8,4 Note that on this occasion I'm using gVim on Windows, so please don't suggest any UNIX programs which may be better suited to the task—I have to do it using Vim.

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• EXE stops working if containing folder is renamed. MSVCP90.dll

  - by John

  This popup comes up as soon as the app is started: The program can't start because MSVCP90.dll is missing from your computer. Before anyone says "install the VC++ runtimes", wait! If I rename the folder containing my .EXE then the app runs. If I rename it back, it breaks. The app has been running for weeks without any changes to my system/VS installation (2008 SP1), we suddenly spotted this error a few days ago. Lost as to why the name of the dir is causing issues... again this has not changed in months and all our resource paths are relative anyway, e.g "../someOtherDir/...." It doesn't just do this on my PC, we have the /bin dir (the one containing EXE) in SVN and suddenly everyone started seeing the same issue, even though the binaries themselves seem just fine. Is it possible some additional data got put into SVN and that's the cause? Since it's not just one PC, there must be something either in SVN or the EXE itself... Note this popup comes before our code even gets to run.

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