malclocke

require 'sequel'
require 'logger'

DB = Sequel.sqlite(loggers: [Logger.new(STDOUT)])

DB.create_table :authors do
  primary_key :id
  String :name
end

malclocke

#
# Example of how to convert CSV data on read, in this case parsing
# some JSON in a CSV.
#
require 'csv'
require 'json'

csv = <<EOT
id,json_stuff
1,"{""foo"":""bar""}"

malclocke

echo -n "3pm Christmas Day in LA in local timezone: "
date --date 'TZ="America/Los_Angeles" 2016-12-25T15:00'

echo -n "3pm Christmas Day in LA in London: "
TZ="Europe/London" date --date 'TZ="America/Los_Angeles" 2016-12-25T15:00'

malclocke

# Example integration spec for a Rake task in Rails
#
# cat <<EOT > lib/tasks/myapp.rake
# namespace :myapp do
#   task :mytask => :environment do
#     puts "Hello"
#   end
# end
# EOT

malclocke

#!/bin/bash

usage() {
  cat <<EOT
Usage: PAPERTRAIL_API_TOKEN=abc123 $0 directory

Save all papertrail archives to outdir.  Existing files will not be
overwritten if they have the correct filesize.

PAPERTRAIL_API_TOKEN can be found under the 'Me -> Profile' in Papertrail,

malclocke

class Animal
  @@noise = nil

  def speak
    @@noise
  end
end

class Dog < Animal
  @@noise = 'Woof'

malclocke

require 'delegate'

class CaseInsensitiveHashWriter < SimpleDelegator
  def []=(key, value)
    return __getobj__[key] unless key.respond_to?(:downcase)
    matched_key = keys.detect do |k|
      k.respond_to?(:downcase) && k.downcase == key.downcase
    end
    if matched_key
      __getobj__[matched_key] = value

malclocke

# Log an exception with the backtrace cleaned as per the 'Application Trace'
# in the development mode browser exception view.
logger.error(
  "some_tag: exception = %s: %s" % [
     exception.inspect,
     Rails.backtrace_cleaner.clean(exception.backtrace)
  ]
)

malclocke

def value_of_first_matching_key_in_hash(hash, array_of_keys)
end

describe do
  it 'searches a hash for an array of keys and returns the value of the first found' do
    keys = [:a, :b, :c]

    hash = {:c => 3, :b => 2, :a => 1}
    expect(value_of_first_matching_key_in_hash(hash, keys)).to eql 1

malclocke

desc <<-EOT
Display the id and error messages of all invalid instances of each model in
model_classes, which should be a comma separated list of model names.  If
model_classes is blank all models will be reported.
EOT
task :validate_models, [:models] => :environment do |t, args|
  model_classes = if args[:models]
                    args[:models].split(',').map(&:constantize)
                  else
                    Rails.application.eager_load!