RoUS

Fedora 29
# rpm -q ruby rubygems
ruby-2.5.5-101.fc29.x86_64
rubygems-2.7.6.2-101.fc29.noarch
# which gem
/usr/bin/gem
[root@Helium etc]# gem
/usr/share/ruby/yaml.rb:5: warning: It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.
Traceback (most recent call last):

RoUS

h1       = {
  :one   => 1,
  :two   => 2,
  :three => 3,
}
# h1 => { :one => 1, :two => 2, :three => 3 }

#
# Each key/value pair is passed as a two-element array as the second
# block argument -- so you can deconstruct it in the arglist declaration.

RoUS

#
# This function provides for sourcing of shell scripts when moving
# into (or out of) a directory.
#
# If the command exits with a non-zero status, or the working
# directory isn't changed, no scripts are processed.
#
# If the command exits with a 0 status and the current working
# directory does change, the previous directory is checked for an
# ".on_exit" file.  If found, it gets sourced.  Similarly, the new WD

RoUS

#! /bin/bash
# -*- coding: utf-8 -*-
#--
#   Copyright © 2015 Ken Coar
#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0

RoUS

#
# Long OptionParser descriptions don't get nicely wrapped by it, so
# this method does the appropriate fill, wrap, and indent.
#
# @license Apache 2.0
#
# @overload wrap(*args)
#  @param [Array<Hash,String>] args
#   The argument list can include multiple strings and hashes.
#

RoUS

# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# vim: ts=4:sw=4:noet
#
function _read_config_file() {
    local	_cfgfile='/dev/stdin'
    local	_section
    local	_varname='CONFIG_HASH'
    local	_line
    local	_key
    local	_value

RoUS

class Array

  #
  # Return an array with all occurrences of 2 or more logically
  # successive elements replaced with ranges, and disjoint elements
  # as-is.
  #
  # @param [Boolean] sorted
  #  If this parameter can be evaluated as a Boolean 'true' value, the
  #  current array will be copied and the copy sorted before

RoUS

#
# This snippet allows you to sprinkle your code with #debugger references
# even if the ruby-debug gem isn't installed (or there's some other error
# encountered loading it).
#
begin
  require('ruby-debug')
  Debugger.start
rescue Exception => e
  unless (Kernel.method_defined?(:debugger))

RoUS

#! /usr/bin/env ruby
#
# PROBLEM:
# Find the greatest product of five consecutive digits in the 1000-digit number.
#
# 73167176531330624919225119674426574742355349194934
# 96983520312774506326239578318016984801869478851843
# 85861560789112949495459501737958331952853208805511
# 12540698747158523863050715693290963295227443043557
# 66896648950445244523161731856403098711121722383113