kenjij

# Configure logger
NekoLogger.logger = Logger.new($stdout, formatter: proc { |s, d, n, m| "#{s} : #{m}\n" })
L = NekoLogger.logger
lvl = ENV['NEKO_LOG_LEVEL']
if String === lvl && ['DEBUG', 'INFO', 'WARN', 'ERROR'].include?(lvl.upcase)
  L.level = eval("Logger::#{lvl.upcase}")
end


#

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# Save this at ~/.ssh/config
Host nickname
    Hostname 192.168.0.123
    User nick
    Port 2222
    IdentityFile ~/.ssh/id_nick
    Compression yes

Host *
    Compression no

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begin
  # do something bad
rescue => e # StandardError by default
  puts "Exception class: #{ e.class.name }"
  puts "Exception message: #{ e.message }"
  puts "Exception backtrace: #{ e.backtrace }"
  # Or just: puts "#{e}"
end

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require 'aws-sdk-dynamodb'

# DynamoDB batch write (put) routine
# @param items [Array<Hash>] DynamoDB items to put
# @param table [String] DynamoDB table name
def ddb_batch_put(items, table)
  ddb = Aws::DynamoDB::Client.new
  batch = items.map { |item| {put_request: {item: item}} if Hash === item }
  batch.compact!
  puts "Batch write to: #{table}, #{batch.length} items."

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# Check IP address
ip a

# Check default gateway
ip r
route -n

# Check DNS server
systemd-resolve --status

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require 'base64'
require 'openssl'

# See: https://www.twilio.com/docs/usage/security#validating-requests
#
# Example of AWS API Gateway (HTTP) + Lambda
def is_twilio_request_valid?(event)
  # Create a string that is your URL with the full query string
  url = "https://#{event['headers']['host']}#{event['rawPath']}"
  # Sort the list of POST variables by the parameter name

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Install Homebrew

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"

Install Oh My ZSH!

sh -c "$(curl -fsSL https://raw.github.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"

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{
  "version":2,
  "path":"/event",
  "httpMethod":"GET",
  "headers":{
    "Content-Length":"0",
    "Host":"abcde12345.execute-api.us-west-2.amazonaws.com",
    "User-Agent":"curl/7.54.0",
    "X-Amzn-Trace-Id":"Root=1-67891233-abcdef012345678912345678",
    "X-Forwarded-For":"192.168.1.23",

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#
# Build and Package RubyGems for AWS Lambda Layer Use
#
all: build package

build:
	gem i firebase-ruby -Ni ruby/gems/2.5.0
	gem i darksky-ruby -Ni ruby/gems/2.5.0
	ls -m ruby/gems/2.5.0/gems

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Edit Windows Registry

1. Open Registry Editor
2. Go to: Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout
3. Edit, or add, binary value key: Scancode Map (see below)
4. Restart to take effect

Map Value