johncarney

The arel_extensions gem has a couple of bugs...

1. DateSub doesn't work:

(table[:column] - 10.hours).to_sql
# => NoMethodError: undefined method `to_sql' for nil:NilClass

2. For MySQL, DateAdd generates a double-minus when given a negative duration:

johncarney

#!/usr/bin/env ruby

# Custom Psych parser that captures line number information from a YAML file.
#
# For a project I'm working on I need to be able to determine which line(s) in a YAML
# file a particular value comes from. There are a few bits of advice on the internet
# about this, the best of them that I've found involves monkey-patching, which is a
# fairly low bar for "best" in my opinion. I found it on Stack Overflow:
#
#   https://stackoverflow.com/questions/29462856/loading-yaml-with-line-number-for-each-key

johncarney

# Examples
#
#   MyModel.order(MyModel.arel_table[:name].asc.nulls_last)
#   MyModel.order(MyModel.arel_table[:name].desc.nulls_first)
module Arel
  module NullOrder
    def nulls_last
      Arel::Nodes::NullsLast.new self
    end

johncarney

#!/usr/bin/env ruby

# Usage: ruby rails-locales-conflicts.rb [<rails root>]

require "pathname"
require "yaml"

class Translations
  def initialize
    @translations = Hash.new do |h, k|

johncarney

def common_array_prefix(*arrays)
  arrays.reduce do |a, b|
    index = a.zip(b).index { |x, y| x != y }
    a[0...index]
  end
end

def common_string_prefix(*strings)
  common_array_prefix(*strings.map(&:chars)).join("")
end

johncarney

#!/usr/bin/env ruby

# Converts the output from reek to GitHub-flavoured Markdown.
#
# Usage:
#   Basically pipe the output from reek through this script.
#
#   reek --sort-by smelliness app lib | ruby reek-to-markdown.rb

def scan_line(line, pattern)

johncarney

Calculating with Functions

Solutions to the Calculating with Functions CodeWars kata.

johncarney

module FlexStruct
  def initialize(*args, **options)
    super(*args, *options.values_at(*members[args.length..-1]))
  end

  def self.new(*args, &block)
    Struct.new(*args, &block).include self
  end
end

johncarney

Keybase proof

I hereby claim:

• I am johncarney on github.
• I am johncarney (https://keybase.io/johncarney) on keybase.
• I have a public key whose fingerprint is 1D0F 663E BE56 A61B 6A17 C152 2ECF 52DC 5C72 1574

To claim this, I am signing this object:

johncarney

# logfilename                                               [owner:group]       mode count size when  flags [/pid_file] [sig_num]
/Users/your-username/path-your-rails-project/log/*.log      your-username:staff 644  4     *    $D0   GJ

# NOTES
#
#   Place file in /etc/newsyslog.d
#   '$D0' under 'when' tells newsyslog to rotate logs daily at midnight.
#   Alternatively you could use '24' for 'when', which would specify "every 24 hours"
#   '*' under 'size' specifies that logs should be rotated regardless of their size.
#   'G' under 'flags' tells newsyslog that the 'logfilename' is a pattern and it should rotate all log files matching the pattern.