| # In general, there are many places in the file where you can leave off the parens in function calls, if you like. | |
| unless typeof exports is "undefined" # `unless ... else` reads poorly in English. Better to stick to `if ... else`. | |
| Spine = exports | |
| else | |
| Spine = @Spine = {} | |
| Spine.version = "0.0.4" | |
| $ = Spine.$ = @jQuery || @Zepto || -> arguments[0] # In Coffee, `or` is preferred over `||`. |
| require './application' | |
| namespace :routes do | |
| task :show do | |
| endpoints = {} | |
| if Sinatra::Application.descendants.any? | |
| #Classic application structure | |
| applications = Sinatra::Application.descendants | |
| applications.each do |app| |
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.
| # The new git-scm.com site includes man pages designed for pleasant viewing in a web browser: | |
| # | |
| # http://git-scm.com/docs | |
| # | |
| # The commands below can be used to configure git to open these pages when | |
| # using `git help -w <command>' from the command line. Just enter the config | |
| # commands in your shell to modify your ~/.gitconfig file. | |
| # Create a new browser command and configure help -w to use it. | |
| git config --global browser.gitscm.cmd "/bin/sh -c 'open http://git-scm.com/docs/\$(basename \$1 .html)' --" |
Many programming languages, including Ruby, have native boolean (true and false) data types. In Ruby they're called true and false. In Python, for example, they're written as True and False. But oftentimes we want to use a non-boolean value (integers, strings, arrays, etc.) in a boolean context (if statement, &&, ||, etc.).
This outlines how this works in Ruby, with some basic examples from Python and JavaScript, too. The idea is much more general than any of these specific languages, though. It's really a question of how the people designing a programming language wants booleans and conditionals to work.
If you want to use or share this material, please see the license file, below.
| Latency Comparison Numbers (~2012) | |
| ---------------------------------- | |
| L1 cache reference 0.5 ns | |
| Branch mispredict 5 ns | |
| L2 cache reference 7 ns 14x L1 cache | |
| Mutex lock/unlock 25 ns | |
| Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
| Compress 1K bytes with Zippy 3,000 ns 3 us | |
| Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
| Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
| using System; | |
| using System.Collections.Generic; | |
| using System.Linq; | |
| using System.Web; | |
| using System.Web.Mvc; | |
| using System.Threading; | |
| using System.Diagnostics; | |
| using System.Text; | |
| namespace StackOverflow.Helpers |
| 1) Install iTerm2, it's awesome. | |
| 2) locate your rubymine commandline integration thingy, it's usually `/usr/local/bin/mine` | |
| 3) Open iTerm2 preferences. Go to Profiles -> Default -> Advanced. | |
| 4) Select "Run command..." under Semantic History | |
| 5) Enter "/usr/local/bin/mine --line \2 \1" as the command |
| h = { | |
| 'a' => :a_value, | |
| 'b' => nil, | |
| 'c' => false | |
| } | |
| h.fetch('a', :default_value) #=> :a_value | |
| h.fetch('b', :default_value) #=> nil | |
| h.fetch('c', :default_value) #=> false | |
| h.fetch('d', :default_value) #=> :default_value |
Ideas are cheap. Make a prototype, sketch a CLI session, draw a wireframe. Discuss around concrete examples, not hand-waving abstractions. Don't say you did something, provide a URL that proves it.
Nothing is real until it's being used by a real user. This doesn't mean you make a prototype in the morning and blog about it in the evening. It means you find one person you believe your product will help and try to get them to use it.
