foreverman

class Integer
  def sum_of_digits
    #why the following inject method call works?
    #[1,2].inject(0) {|object, *args| object.send('+', *args)}
    to_s.split('').map(&:to_i).inject(0, &:+)
  end
end

# why the following doesn't work
[12, 34].inject(0, &:sum_of_digits) 

foreverman

# a module to make insertions and updates serializable given the unique keys/fields 
# a unique constraint have to be created based the keys
module Serializable
  EXCEPTIONS = [
    ActiveRecord::StaleObjectError, ActiveRecord::StatementInvalid,
    ActiveRecord::RecordNotUnique 
  ]

  def self.included(base_class)
    base_class.extend(ClassMethods)

foreverman

module Where
  class <<self
    attr_accessor :editor
    
    def is_proc(proc)
      source_location(proc)
    end
    
    def is_method(klass, method_name)
      source_location(klass.method(method_name))

foreverman

$ ruby -e 'exit'
$ echo $?
0
$ ruby -e 'exit 1'
$ echo $?
1
$ ruby -e 'abort "oh no"'
oh no
$ echo $?
1

foreverman

ruby-1.8.7-p352 :002 > #current time zone
ruby-1.8.7-p352 :003 >   Time.zone
 => #<ActiveSupport::TimeZone:0x10e5d8c98 @current_period=nil, @name="UTC", @tzinfo=#<TZInfo::TimezoneProxy: Etc/UTC>, @utc_offset=nil>

irb(main):009:0> d.created_at
=> Fri, 04 May 2012 06:57:18 UTC +00:00

irb(main):012:0> d.created_at.time_zone.name
=> "UTC"

foreverman

jobs_per_process = 100
process_count = 10

User.find_in_batches(:batch_size => jobs_per_process * process_count) do |group|
  batches = group.in_groups(process_count)
  Parallel.each(batches, :in_processes => process_count) do |batch| 
    ActiveRecord::Base.establish_connection
    # Do the actual work
    batch.each {|user| .. }
  end

foreverman

if GC.respond_to?(:copy_on_write_friendly=)
  GC.copy_on_write_friendly = true
end

jobs_per_process = 100
process_count = 10

User.find_in_batches(:batch_size => jobs_per_process * process_count) do |group|
  batches = group.in_groups(process_count)

foreverman

" Vim functions to run RSpec and Cucumber on the current file and optionally on
" the spec/scenario under the cursor. Within the context of a Rails app, will
" prefer script/spec and script/cucumber over their system counterparts.
function! RailsScriptIfExists(name)
  " Bundle exec
  if isdirectory(".bundle") || (exists("b:rails_root") && isdirectory(b:rails_root . "/.bundle"))
    return "bundle exec " . a:name
  " Script directory
  elseif exists("b:rails_root") && filereadable(b:rails_root . "/script/" . a:name)
    return b:rails_root . "/script/" . a:name