tcopeland

irb(main):014:0> puts RUBY_VERSION ; n = 5000 ; Benchmark.bm {|x| x.report { n.times {'  '.strip.empty?} } ; x.report {  n.times { '   ' =~ /^\s*$/ } } }
2.1.5
       user     system      total        real
   0.010000   0.000000   0.010000 (  0.007651)
   0.000000   0.010000   0.010000 (  0.005907)
   
   irb(main):016:0> puts RUBY_VERSION ; n = 5000 ; Benchmark.bm {|x| x.report { n.times {'  '.strip.empty?} } ; x.report {  n.times { '   ' =~ /^\s*$/ } } }
2.2.0
       user     system      total        real
   0.000000   0.000000   0.000000 (  0.001773)

tcopeland

#!/usr/local/bin/ruby

require 'rubygems'
gem 'passenger'
require 'phusion_passenger'
require 'phusion_passenger/platform_info'
require 'phusion_passenger/admin_tools/memory_stats'
require 'optparse'

include PhusionPassenger

tcopeland

$ sudo puppet apply --verbose manifests/site.pp 
/usr/local/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': iconv will be deprecated in the future, use String#encode instead.
Could not load confine test 'operatingsystem': cannot load such file -- puppet/provider/confine/operatingsystem
Could not load confine test 'operatingsystem': cannot load such file -- puppet/provider/confine/operatingsystem
Could not load confine test 'operatingsystem': cannot load such file -- puppet/provider/confine/operatingsystem
Could not load confine test 'operatingsystem': cannot load such file -- puppet/provider/confine/operatingsystem
Could not load confine test 'operatingsystem': cannot load such file -- puppet/provider/confine/operatingsystem
Could not load confine test 'operatingsystem': cannot load such file -- puppet/provider/confine/operatingsystem
Could not load confine test 'operatingsystem': cannot load such file -- puppet/provider/confine/operatingsystem
Could not load confine test 'operatingsystem': cannot 

tcopeland

$ vagrant init lucid64
A `Vagrantfile` has been placed in this directory. You are now
ready to `vagrant up` your first virtual environment! Please read
the comments in the Vagrantfile as well as documentation on
`vagrantup.com` for more information on using Vagrant.
bogle> $ vagrant up
[default] Importing base box 'lucid64'...
[default] The guest additions on this VM do not match the install version of
VirtualBox! This may cause things such as forwarded ports, shared
folders, and more to not work properly. If any of those things fail on

tcopeland

# From charlest here:
# http://www.vanityfair.com/online/daily/2012/07/microsoft-downfall-emails-steve-ballmer

Taking platform developers and throwing them against hard goals and deadlines kills your ability to adapt. Management 
and project stakeholders end up making too many decisions about the technology away from the people who know it 
best – the people building it. To show progress and keep management happy, engineers shift their focus to tangible 
deliverables and ignore the pieces management can't understand, like the underlying architecture. You start going 
down the path of building lots of bells and whistles, but nothing solid that you can competitively leverage.

tcopeland

# Use Kernel#tap
# wrong
x = [1,2]
x << 3
return x
# right
[1,2].tap {|y| y << 3 }

tcopeland

Synvert::Rewriter.new 'rails', 'redirect_with_notice' do
  description <<-EOS
  Combines flash setting and redirect to.
  flash[:notice] = "huzzah"
  redirect_to root_path
  =>
  redirect_to root_path, notice: "huzzah"
  EOS
  within_file 'app/controllers/**/*rb' do
    within_node type: 'def' do

tcopeland

a = {zzz: [{b: 1, c: 2}, {b:3, c:4}]}
 
  # slight variant on https://stackoverflow.com/questions/10676608/ruby-deleting-all-instances-of-a-particular-key-from-hash-of-hashes
  class Hash
   def deep_reject_key!(key)
     keys.each {|k| delete(k) if k == key || self[k] == self[key] }

     values.each do |v| 
       v.deep_reject_key!(key) if v.is_a? Hash
       v.each {|i| i.deep_reject_key!(key) if i.is_a? Hash } if v.is_a? Array

tcopeland

class TravelOption < ApplicationRecord
  has_many :travels
end


class Travel < ApplicationRecord
  belongs_to :travel_option
end

>> TravelOption.joins(:travels).where(location_id: 1).select(:location_id, :price, :tour_id).map(&:tour_id)

tcopeland

>> Book.select(:author, :isbn).first
  Book Load (0.4ms)  SELECT  "books"."author", "books"."isbn" FROM "books" ORDER BY "books"."id" ASC LIMIT $1  [["LIMIT", 1]]
=> #<Book id: nil, isbn: "0787967076", author: "Steven B. Sample">
>> Book.select(:id, :author, :isbn).first
  Book Load (0.3ms)  SELECT  "books"."id", "books"."author", "books"."isbn" FROM "books" ORDER BY "books"."id" ASC LIMIT $1  [["LIMIT", 1]]
=> #<Book id: 5, isbn: "0787967076", author: "Steven B. Sample">
>> Book.find(5).update(isbn: nil, author: "heyo")
  Book Load (0.5ms)  SELECT  "books".* FROM "books" WHERE "books"."id" = $1 LIMIT $2  [["id", 5], ["LIMIT", 1]]
   (0.1ms)  BEGIN
  SQL (19.7ms)  UPDATE "books" SET "isbn" = $1, "author" = $2, "escaped_author" = $3, "updated_at" = $4 WHERE "books"."id" = $5  [["isbn", nil], ["author", "heyo"], ["escaped_author", "heyo"], ["updated_at", 2017-12-13 20:40:57 UTC], ["id", 5]]