JavaScript closures vs. anonymous functions
A friend of mine and I are currently discussing what is a closure in JS and what isn't. We just want to make sure we really understand it correctly. Let's take this example. We have a counting loop and want to print the counter variable on the console delayed. Therefore we use setTimeout and closures to capture the value of the counter variable to make sure that it will not print N times the value
List of freely available programming books - Stack Overflow
I'm trying to amass a list of programming books with opensource licenses, like Creative Commons, GPL, etc. The books can be about a particular programming language or about computers in general. Hoping you guys could help: Languages Python Dive Into Python How to Think Like a Computer Scientist A Byte of Python Python for Fun Ruby Why's (Poignant) Guide to Ruby PHP Practical PHP Programming Perl E
creative commons - List of freely available programming books - Stack Overflow
locked by Bill the Lizard♦ Aug 15 at 14:56 This question exists because it has historical significance, but it is not considered a good, on-topic question for this site, so please do not use it as evidence that you can ask similar questions here. This question and its answers are frozen and cannot be changed. More info: FAQ. Meta-Lists 25 Free Computer Science Ebooks Book Training - On Video Cheat
iOS5 Images disappear when scrolling with webkit-overflow-scrolling: touch
I had previously been using iScroll plugin but wanted to drop it for the native behaviour. The initial implementation was using webkit-overflow-scrolling: auto; however I updated this to ... webkit-overflow-scrolling: touch .. to enable the motion/inertia on the touch scroll. The issue with this is the list items contained within the navigation disappear completely when scrolling, and only return
How to universally skip database touches when precompiling assets on Heroku
I'm deploying a Rails 3.1 app to Heroku's Cedar stack. With Heroku Cedar and Rails 3.1, you can compile the assets yourself locally, let Heroku compile them when you push (during "slug compilation"), or have them be compiled just-in-time while the app is running. I want to do the middle option, letting Heroku precompile the assets. When Heroku runs the assets:precompile task, it errors with "could
How to do search & replace with ack in vim?
I am using the Ack plugin in Vim, which helps me to quickly search for strings in my project. However, sometimes I want to replace all or some occurrences of the found strings. You can do some kind of global search and replace using the Vim arglist like this (source) : :args app/views/*/* :argdo %s/, :expire.*)/)/ge | update But instead of using args, I would prefer to do a search via Ack and then
Ruby gem mysql2 install failing
When I try to install the mysql2 gem, it fails with no apparent errors. Does anyone know what to do to work around this so mysql2 installs? $ sudo gem install mysql2 Building native extensions. This could take a while... ERROR: Error installing mysql2: ERROR: Failed to build gem native extension. /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb checking for rb_thread_
Invalid date format specification in gemspec
I am getting the following error when I try to use gems in windows, and I also referred to this stackoverflow post and updated rubygems and rails. But nothing could solve the problem. The following is the complete error, D:\>gem env Invalid gemspec in [D:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/specifications /tilt-1.3.3.gemspec]: invalid date format in specification: "2011-08-25 00:00:00 .0000
Expand/collapse section in UITableView in iOS
You have to make your own custom header row and put that as the first row of each section. Subclassing the UITableView or the headers that are already there will be a pain. Based on the way they work now, I am not sure you can easily get actions out of them. You could set up a cell to LOOK like a header, and setup the tableView:didSelectRowAtIndexPath to manually expand or collapse the section it
Can't install do_mysql gem?
I'm trying to install the do_mysql on my Snow Leopord system Macbook Pro 13", but I keep getting this error: n216-160:~ myself$ sudo gem1.9 install do_mysql Password: Building native extensions. This could take a while... ERROR: Error installing do_mysql: ERROR: Failed to build gem native extension. /opt/local/bin/ruby1.9 extconf.rb checking for mysql_query() in -lmysqlclient... no *** extconf.rb
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