mlanett

This is a cleaned-up transcript for https://www.youtube.com/watch?v=R_GlkMCBVYk

UK Sailmakers Presents: The Life Sling – The Safest M.O.B. Recovery Tool

After multiple well-reported incidents of failed man overboard (M.O.B.) recovery attempts, thought leaders in the world of safety at sea are rethinking the best methods for retrieving someone from the water.

The traditional side pickup method—long the primary technique taught—is now being replaced by recoveries using the Life Sling. Your chances of a successful recovery greatly increase when the person is rescued on the first attempt. For this reason, it’s recommended that you turn on your engine immediately. This gives you more control and maneuverability while circling back and approaching the M.O.B.

The Risks of Side Pickups

mlanett

#!/usr/bin/env python
# Derived from https://github.com/apangin/jstackmem/blob/master/jstackmem.py
import bisect
import re
import subprocess
import sys

if len(sys.argv) < 2:
    print("Calculate stack memory used by a Java process")
    print("Usage: python jstackmem.py <pid>")

mlanett

SELECT pid,
       age(clock_timestamp(), query_start),
       usename,
       state,
       -- get rid of newlines, runs of spaces
       regexp_replace(query, E'[\\n\\r ]+', ' ', 'g' ) as query

-- , pg_terminate_backend(pid) -- UNCOMMENT TO KILL

FROM pg_stat_activity

mlanett

def assert condition
  raise unless condition
end

#
# @fields at the class level are singleton fields.
# Singleton fields may be initialized but this is not required.
# Singleton fields can only be accessed by singleton methods.
# Singleton fields are not inherited by subclasses (although singleton methods *are* inherited).
#

mlanett

def assert condition
  raise unless condition
end

#
# @@fields are class fields, shared by all instances and all subclasses.
# Class fields MUST be initialized.
# Class fields can be accessed by instance methods.
# Class fields can be accessed by singleton methods.
#

mlanett

cd /tmp
mkdir bash-fix

cd bash-fix

curl https://opensource.apple.com/tarballs/bash/bash-92.tar.gz | tar zxf -

cd bash-92/bash-3.2

curl https://ftp.gnu.org/pub/gnu/bash/bash-3.2-patches/bash32-052 | patch -p0

mlanett

HTTP status code symbols for Rails

Thanks to Cody Fauser for this list of HTTP responce codes and their Ruby on Rails symbol mappings.

Status Code Symbol
1xx Informational
100 :continue
101 :switching_protocols
102 :processing

mlanett

=begin

  Include in your rspec config like so:

  RSpec.configure do |spec|
    spec.include RSpec::RedisHelper, redis: true
  end

  This helper will clean redis around each example.
=end

mlanett

# Copyright (c) 2014 Mark Lanett.
# Permission is hereby granted, free of charge, to deal in this software without restriction of any sort.

module Fluent

  def self.included(base)
    base.extend(ClassSingletonMethods)
  end

  module ClassSingletonMethods