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adamsanderson / .tmproperties
Created January 13, 2016 21:03
Minimal Textmate config for Node
View .tmproperties
# Should parent directory in window title:
windowTitle = "${TM_DIRECTORY/^.*\///}/$TM_DISPLAYNAME"
# Hide node_modules from search and chooser:
excludeInFolderSearch = "node_modules"
excludeInFileChooser = "node_modules"
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adamsanderson / README.markdown
Created March 29, 2015 23:42
Hash vs Array vs Set
View README.markdown

For simple duplicate checking, which is faster, a Ruby hash, array, or set?

For arrays, we try two approaches, when inserting data either avoid duplicates, or just add them to the list.

This is most likely flawed, and should probably be taken with a grain of salt.

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adamsanderson / Gemfile
Last active January 23, 2024 14:08
Demonstration of hierarchical queries in Postgres using a materialized path. It will create a new database that you can later play around with.
View Gemfile
source 'https://rubygems.org'
gem 'activerecord', '4.0.0.rc1'
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adamsanderson / estimate.peg
Created July 18, 2011 23:21
PEG for LiquidPlanner Ranged Estimate
View estimate.peg
// Just playing around...
// http://pegjs.majda.cz/online
start
= '[' _ est:estimate _ ']' { return est; }
/ est:estimate { return est; }
estimate
= low:duration _ '-' _ high:duration {return [low, high]}
/ fixed:duration { return [fixed, fixed]; }
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adamsanderson / perf.js
Created April 22, 2011 15:07
Webkit Page Load Performance
View perf.js
// One liner to report the perceived performance of a page:
TM = window.performance.timing; console.log(window.location.toString(), TM.domInteractive - TM.unloadEventStart, TM.domComplete - TM.unloadEventStart);
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adamsanderson / gist:786562
Created January 19, 2011 18:02
Instrumentation for rails test cases in ruby 1.9
View gist:786562
setup{
GC.start
@__mem_stats = ObjectSpace.count_objects.dup
}
teardown{
GC.start
ObjectSpace.count_objects.each{|k,v| puts("%12s: %d" % [k, v - @__mem_stats[k] || 0]) }
}
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adamsanderson / future.rb
Created January 18, 2011 15:44
An example of using Delegator to implement Futures in ruby.
View future.rb
require 'delegate'
class Future < SimpleDelegator
def initialize(&block)
@_thread = Thread.start(&block)
end
def __getobj__
__setobj__(@_thread.value) if @_thread.alive?
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adamsanderson / transient_cache.rb
Created January 3, 2011 01:20
An example of using WeakRef for caching data
View transient_cache.rb
require 'weakref'
class TransientCache < Hash
class AmbivalentRef < WeakRef
def __getobj__
super rescue nil
end
end
def []= key, object
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adamsanderson / job_runner.rb
Created December 22, 2010 19:45
An example of using TSort
View job_runner.rb
require 'tsort'
class JobRunner
include TSort
Job = Struct.new(:name, :dependencies)
def initialize()
@jobs = Hash.new{|h,k| h[k] = []}
end
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adamsanderson / test_mail_purge.rb
Created December 18, 2010 04:35
An example of using MiniTest::Mock
View test_mail_purge.rb
require 'minitest/mock'
require 'minitest/unit'
require 'date'
MiniTest::Unit.autorun
class TestMailPurge < MiniTest::Unit::TestCase
class MailPurge
def initialize(imap)
@imap = imap