| The Logic | |
| In theory, you are correct. However, there are a few flaws with this rationale: | |
| From what you stated, it's unclear if you actually tested / profiled your app. In other words, do you actually know that the network transfers from the app to the API are the slowest component? Because that is intuitive, it is easy to assume that it is. However, when discussing performance, you should never assume. At my employer, I am the performance lead. When I first joined, people kept talking about CDN's, replication, etc. based on intuition about what the bottlenecks must be. Turns out, our biggest performance problems were poorly performing database queries. | |
| You are saying that because databases are good at retrieving data, that the database is necessarily running at peak performance, is being used optimally, and there is nothing that can be done to improve it. In other words, databases are designed to be fast, so I should never have to worry about it. Another dangerous line of thinking. That's like saying a ca |
Brought to you by Headjack
FFmpeg is one of the most powerful tools for video transcoding and manipulation, but it's fairly complex and confusing to use. That's why I decided to create this cheat sheet which shows some of the most often used commands.
Let's start with some basics:
ffmpeg calls the FFmpeg application in the command line window, could also be the full path to the FFmpeg binary or .exe file
| // Blur Effect | |
| var blurEffect = UIBlurEffect(style: UIBlurEffectStyle.Dark) | |
| var blurEffectView = UIVisualEffectView(effect: blurEffect) | |
| blurEffectView.frame = view.bounds | |
| view.addSubview(blurEffectView) | |
| // Vibrancy Effect | |
| var vibrancyEffect = UIVibrancyEffect(forBlurEffect: blurEffect) | |
| var vibrancyEffectView = UIVisualEffectView(effect: vibrancyEffect) | |
| vibrancyEffectView.frame = view.bounds |
| ffmpeg -i LostInTranslation.mkv -vcodec copy -acodec copy LostInTranslation.mp4 |
| require "uri" | |
| require "net/http" | |
| require "nokogiri" | |
| require "logger" | |
| name_final = Array.new | |
| uri = URI.parse("http://resultsarchives.nic.in/cbseresults/cbseresults2004/class12/cbse12.asp") | |
| req = Net::HTTP::Post.new(uri.path, { | |
| 'Referer' => "http://resultsarchives.nic.in/cbseresults/cbseresults2004/class12/cbse12.htm", |
| Access-Control-Allow-Headers | |
| Access-Control-Allow-Methods | |
| Access-Control-Allow-Origin | |
| Access-Control-Max-Age |
| # Monkey patch to increase the number of records | |
| # exported in csv download -default is 10k | |
| module ActiveAdmin | |
| class ResourceController | |
| module DataAccess | |
| # in active admin 0.6 | |
| def max_csv_records | |
| 30_000 | |
| end | |
| # needed for current active admin master |
Error ->
dlopen(/Users/vivek/.rvm/gems/ruby-1.9.3-p327/gems/rmagick-2.13.1/lib/RMagick2.bundle, 9): Library not loaded: /usr/local/lib/libjpeg.8.dylib Referenced from: /usr/local/opt/imagemagick/lib/libMagickCore.5.dylib Reason: Incompatible library version: libMagickCore.5.dylib requires version 13.0.0 or later, but libjpeg.8.dylib provides version 12.0.0 - /Users/vivek/.rvm/gems/ruby-1.9.3-p327/gems/rmagick-2.13.1/lib/RMagick2.bundle
Step1 : Update XCode. Get the latest one Xcode 4.6 Mountain Lion does not come with ruby headers installed before hand, so you need to do this manually from XCode. Go to Xcode Preferences/Downloads.
Install Command Line Tools
| <html> | |
| <head> | |
| <title>Geek Hours</title> | |
| <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> | |
| </head> | |
| <body leftmargin="0" topmargin="0" marginwidth="0" marginheight="0"> | |
| <!-- Save for Web Slices (Email - invoice notification.psd) --> | |
| <table align="center" border="0" cellpadding="0" cellspacing="0" width="620" > | |
| <tr> |