Skip to content

Instantly share code, notes, and snippets.

Nathan Witmer zerowidth

Block or report user

Report or block zerowidth

Hide content and notifications from this user.

Learn more about blocking users

Contact Support about this user’s behavior.

Learn more about reporting abuse

Report abuse
View GitHub Profile
View ctags definitions for Javascript
--regex-js=/(,|(;|^)[ \t]*(var|let|([A-Za-z_$][A-Za-z0-9_$.]+\.)*))[ \t]*([A-Za-z0-9_$]+)[ \t]*=[ \t]*\{/\5/,object/
--regex-js=/(,|(;|^)[ \t]*(var|let|([A-Za-z_$][A-Za-z0-9_$.]+\.)*))[ \t]*([A-Za-z0-9_$]+)[ \t]*=[ \t]*function[ \t]*\(/\5/,function/
--regex-js=/(,|(;|^)[ \t]*(var|let|([A-Za-z_$][A-Za-z0-9_$.]+\.)*))[ \t]*([A-Za-z0-9_$]+)[ \t]*=[ \t]*\[/\5/,array/
--regex-js=/(,|(;|^)[ \t]*(var|let|([A-Za-z_$][A-Za-z0-9_$.]+\.)*))[ \t]*([A-Za-z0-9_$]+)[ \t]*=[ \t]*[^"]'[^']*/\5/,string/
--regex-js=/(,|(;|^)[ \t]*(var|let|([A-Za-z_$][A-Za-z0-9_$.]+\.)*))[ \t]*([A-Za-z0-9_$]+)[ \t]*=[ \t]*(true|false)/\5/,boolean/
--regex-js=/(,|(;|^)[ \t]*(var|let|([A-Za-z_$][A-Za-z0-9_$.]+\.)*))[ \t]*([A-Za-z0-9_$]+)[ \t]*=[ \t]*[0-9]+/\5/,number/
--regex-js=/(,|(;|^)[ \t]*(var|let|([A-Za-z_$][A-Za-z0-9_$.]+\.)*))[ \t]*([A-Za-z0-9_$]+)[ \t]*=[ \t]*.+([,;=]|$)/\5/,variable/
--regex-js=/(,|(;|^)[ \t]*(var|let|([A-Za-z_$][A-Za-z0-9_$.]+\.)*))[ \t]*([A-Za-z0-9_$]+)[ \t]*[ \t]*([,;]|$)/\5/,variable/
raggi / eventmachine_is_web_scale.rb
Created Sep 1, 2010
the secrets of the web scale sauce
View eventmachine_is_web_scale.rb
require 'eventmachine' do
open(RUBY_PLATFORM =~ /mswin|mingw/ ? 'NUL:' : '/dev/null', 'w')
EM.start_server('', 80, do
def post_init; proxy_incoming_to(SEKRET_SAUCE); end
View if_syntax_is_your_concern.rb
module Test
module Unit
TestCase = RSpec::Core::ExampleGroup
class Test::Unit::TestCase
def self.inherited(host)
def host.method_added(name)
lynaghk / gist:1141054
Created Aug 11, 2011
Clojure sequentials & maps into JavaScript arrays and objects
View gist:1141054
(defn jsArr
"Recursively converts a sequential object into a JavaScript array"
(.array (vec (map #(if (sequential? %) (jsArr %) %)
(defn jsObj
"Convert a clojure map into a JavaScript object"
(.strobj (into {} (map (fn [[k v]]
simonmichael / gist:1185421
Created Sep 1, 2011
ghc-pkg-clean, ghc-pkg-reset
View gist:1185421
# unregister broken GHC packages. Run this a few times to resolve dependency rot in installed packages.
# ghc-pkg-clean -f cabal/dev/packages*.conf also works.
function ghc-pkg-clean() {
for p in `ghc-pkg check $* 2>&1 | grep problems | awk '{print $6}' | sed -e 's/:$//'`
echo unregistering $p; ghc-pkg $* unregister $p
# remove all installed GHC/cabal packages, leaving ~/.cabal binaries and docs in place.

Stevey's Google Platforms Rant

I was at Amazon for about six and a half years, and now I've been at Google for that long. One thing that struck me immediately about the two companies -- an impression that has been reinforced almost daily -- is that Amazon does everything wrong, and Google does everything right. Sure, it's a sweeping generalization, but a surprisingly accurate one. It's pretty crazy. There are probably a hundred or even two hundred different ways you can compare the two companies, and Google is superior in all but three of them, if I recall correctly. I actually did a spreadsheet at one point but Legal wouldn't let me show it to anyone, even though recruiting loved it.

I mean, just to give you a very brief taste: Amazon's recruiting process is fundamentally flawed by having teams hire for themselves, so their hiring bar is incredibly inconsistent across teams, despite various efforts they've made to level it out. And their operations are a mess; they don't real

tonyc / gist:1384523
Last active Oct 30, 2019
Using strace and lsof
View gist:1384523

Using strace and lsof to debug blocked processes

You can use strace on a specific pid to figure out what a specific process is doing, e.g.:

strace -fp <pid>

You might see something like:

select(9, [3 5 8], [], [], {0, 999999})   = 0 (Timeout)
burke /
Created Jan 27, 2012 — forked from funny-falcon/cumulative_performance.patch
ruby-1.9.3-p327 cumulative performance patch for rbenv

ruby-1.9.3-p327 cumulative performance patch for rbenv

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.

hellerbarde / latency.markdown
Created May 31, 2012 — forked from jboner/latency.txt
Latency numbers every programmer should know
View latency.markdown

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs
Read 1 MB sequentially from memory ..... 250,000 ns  = 250 µs
andkerosine / raskell.rb
Created Aug 15, 2012
Haskell-like list comprehensions in Ruby
View raskell.rb
$stack, $draws = [], {}
def method_missing *args
return if args[0][/^to_/]
$stack << { |a| a or $stack.pop }
$draws[$stack.pop(2)[0][0]] = args[1] if args[0] == :<
class Array
def +@
You can’t perform that action at this time.