zenkay

Ruby, RVM and Mountain Lion

Key problems

Mountain Lion (10.8) has three main difference compared to Lion (10.7):

• XCode 4.4 does not install Command Line Tools by default
• X11 isn't available anymore
• The installed version of OpenSSL has some bugs

How to work around

dkubb

require 'memoist'

# Usage:
#
# customers = Customer.preload(Customer.orders.line_items.item)
#
# customers.each do |customer|
#   customer.orders.each do |order|
#     order.line_items.each do |line_item|
#       line_item.item  # yay, no more N+1, only 4 queries executed !

jpr5

#!/usr/bin/ruby

[
    'addressable.git', 'extlib.git',
    'do.git/data_objects', 'do.git/do_mysql',
    'dm-core.git', 'dm-migrations.git', 'dm-transactions.git', 'dm-do-adapter.git', 'dm-mysql-adapter-1.0.0',
].each do |path|
    $:.unshift "common/gems/#{path}/lib"
end

jpr5

{
        "~f" = "moveWordForward:";
        "~b" = "moveWordBackward:";
        "~<" = "moveToBeginningOfDocument:";
        "~>" = "moveToEndOfDocument:";
        "~v" = "pageUp:";
        "^v" = "pageDown:";
        "~d" = "deleteWordForward:";
        "~^h" = "deleteWordBackward:";
        "~\Uf728" = "deleteWordForward:";

jpr5

require 'digest/sha1'

class RefCode < ::DataMapper::Property::String
    required     true
    unique_index true
    default      proc { |_, prop| prop.class.generate(prop.length) }

    # Setting :format before passing on the initialization chain will cause
    # dm-validations (if present) to auto-add a format validation for us.
    # For some reason setting :length is not doing the same, so our format

jpr5

#!/usr/bin/ruby

s  = "I really think this regexp engine sucks, why don't they just use PCRE?"
re = /((\w+\s*)+ regexp)$/

re.match(s)

puts "NIH, muthafuckaz, NIH!!!!!!!!"  # p.s you'll never see this line

jpr5

See associated gist for simple definitions of Project, User, Task, Answer models
referenced herein.

Summary:

    I believe the logic about how JOINs are constructed needs to fundamentally
    change.  In order to create the correct JOIN SQL, the logic needs to be
    aware of and account for how an individual query param's "links" are related
    to each other *only*, instead of how they the query param's themselves
    relate to each other (which is how I intepret how it works now).

jpr5

require "do_mysql"
require "dm-core"

require 'rubygems'
require 'ruby-debug'
Debugger.start

DataMapper::Logger.new(STDOUT, :debug)
DataMapper.setup(:default, "mysql://root@localhost/foo")