| #lang racket | |
| (require parser-tools/lex | |
| (prefix-in re- parser-tools/lex-sre) | |
| parser-tools/yacc) | |
| (provide (all-defined-out)) | |
| (define-tokens a (NUM VAR)) | |
| (define-empty-tokens b (+ - EOF LET IN)) | |
| (define-lex-trans number | |
| (syntax-rules () |
This installs a patched ruby 1.9.3-p327 with various performance improvements and a backported COW-friendly GC, all courtesy of funny-falcon.
You will also need a C Compiler. If you're on Linux, you probably already have one or know how to install one. On OS X, you should install XCode, and brew install autoconf using homebrew.
As configured in my dotfiles.
start new:
tmux
start new with session name:
| --colour | |
| -I app |
| # config/initializers/redcarpet.rb | |
| module ActionView | |
| module Template::Handlers | |
| class Markdown | |
| class_attribute :default_format | |
| self.default_format = Mime::HTML | |
| def call(template) | |
| markdown = Redcarpet::Markdown.new(Redcarpet::Render::HTML, :autolink => true, :space_after_headers => true) | |
| markdown.render(template.source).html_safe.inspect |
| def s3_form_tag(options = {}) | |
| bucket = options[:bucket] | |
| access_key_id = options[:access_key_id] | |
| secret_access_key = options[:secret_access_key] | |
| key = options[:key] || '' | |
| content_type = options[:content_type] || '' # Defaults to binary/octet-stream if blank | |
| redirect = options[:redirect] || '/' | |
| acl = options[:acl] || 'public-read' | |
| expiration_date = options[:expiration_date].strftime('%Y-%m-%dT%H:%M:%S.000Z') if options[:expiration_date] | |
| max_filesize = options[:max_filesize] || 671088640 # 5 gb |
| # Add Git branch prompt | |
| function git-current-branch { | |
| git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1) /' | |
| } | |
| # Add custom bash prompt via kirsle.net/wizards/ps1.html | |
| export PS1="\u@macbook \[$(tput setaf 2)\][\W] \[$(tput setaf 1)\]\$(git-current-branch)\[$(tput setaf 7)\]> \[$(tput sgr0)\]" | |
| # Add Git auto completion support | |
| source /Library/Developer/CommandLineTools/usr/share/git-core/git-completion.bash |
I've been taking a compilers class this semester from Matt Might, which has been a great experience. Amongst the most challenging/interesting aspects of the course has been taming Racket, a Scheme-y/LISP-y language (I'll leave it at that).
Having never used anything functional/LISP-y in my days, this was a brand new experience. On the whole, it was good, but here's how I wish my first introduction to the language had gone as it would have set me on the right foot. While I'm focusing on Racket here, I imagine this same thing applies to LISP/Scheme and its derivatives.
I read everywhere that, "In Racket, code and data are the same thing." That sentence alone was useless to me, and it took a number of weeks before I "got it." Perhaps this explanation may have been more helpful:
| AVMutableComposition* mixComposition = [[AVMutableComposition alloc] init]; | |
| NSString *path1 = _exportPaths[0]; | |
| NSString *path2 = _exportPaths[1]; | |
| //load assets | |
| AVURLAsset *asset1 = [AVURLAsset URLAssetWithURL:[NSURL fileURLWithPath:path1] options:nil]; | |
| AVURLAsset *asset2 = [AVURLAsset URLAssetWithURL:[NSURL fileURLWithPath:path2] options:nil]; | |
| //create mutable composition track and add all assets to this track | |
| AVMutableCompositionTrack *track = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid]; |
