drhuffman12

# 
apt-get update | apt-get upgrade


# Install ant and dependancies. [Ignore errors about "libjli.so" missing; it appears to be a soft vs hard float java issue. We will replace Java in a later step.]
apt-get install ant -y

# Download Oracle Jdk 8 for Linux 32bit from: http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
# ... The download should be a file like: jdk-8u20-linux-i586.tar.gz

drhuffman12

# Download Oracle Jdk 8 for Linux 32bit from:http://www.oracle.com/technetwork/java/javase/downloads/jdk8-arm-downloads-2187472.html
# ... The download should be a file like: jdk-8u33-linux-arm-vfp-hflt.tar.gz
 
# Download JRuby from: http://www.jruby.org/download
# ... The download should be a file like: jruby-bin-1.7.18.tar.gz, jruby-bin-9.0.0.0.pre1.tar.gz
 
# Install 'GNURoot' and 'GNURoot Wheezy x86' from app store, see:
#   [gnuroot app](https://play.google.com/store/apps/details?id=champion.gnuroot&hl=en)
#   [gnuroot repo](https://github.com/corbinlc)
 

drhuffman12

#!/usr/bin/ruby

# FILENAME: av_splitter.rb
#
# DESCRIPTION: Convert and split an audio/video file into 5 minute intervals of the specified target format and compression quality.
#
# USAGE:
#   Put your audio/video files into the "in" sub-folder, then run the 'audio_splitter.rb' ruby script w/syntax:
#     ruby -s audio_splitter.rb <format_out> '<bit_rate_info>' <debug_level>
#

drhuffman12

# Official site for the Ruby language: "https://www.ruby-lang.org/"

class C1
  attr :a, :b
  def initialize(a)
    @a = a
  end
  def self.hi
    puts 'hello world'

drhuffman12

# GIST: "pw_from_console.rb" under "https://gist.github.com/drhuffman12"
# If you're dealing with a Java character array (such as password characters that you read from the console), you can convert it to a JRuby string with the following Ruby code:

    jconsole = Java::java.lang.System.console()
    password = jconsole.readPassword()
    ruby_string = ''
    password.to_a.each {|c| ruby_string << c.chr}
    
    # .. do something with 'password' variable ..    
    puts "password_chars: #{password_chars.inspect}"

drhuffman12

#!/usr/bin/ruby

=begin
  ## USAGE:
  
    # Ruby:
      ruby gem-fetch-dependencies.rb fetch <gem_name> --dependencies
      
    # JRuby:
      jruby gem-fetch-dependencies.rb fetch <gem_name> --dependencies

drhuffman12

=begin

https://gist.github.com/drhuffman12/a5ad839b71e8ca334a2a

  Problem statement:

    Create a class named PalindromeDetector.  Within that class, implement a 
    static function named GetPalindromeYears that takes a start and end date as parameters and 
    returns a distinct set of Dates in chronological order(inclusive of start and end dates)
    that, when formatted as MMddyyyy, are palindromes.

drhuffman12

#!/usr/bin/env bash
me="$(basename "$(test -L "$0" && readlink "$0" || echo "$0")")"
# echo $me
if [ -z "$1" ] || [ -z "$2" ] || [ -z "$3" ] || [ -z "$4" ]
then
  echo
  echo 'To create a Ruby app folder and configure it for RVM usage, use the following syntax:'
  echo
  echo '  bash --login './$me 'PROJ_ROOT PROJ_NAME PROJ_RUBY_VER PROJ_GEMSET_NAME'
  echo

drhuffman12

require "benchmark"
require "big"

# def fib(n : BigInt)
#   n < 2 ? n : fib(n-1) + fib(n-2)
# end 

struct BigInt
  def add!(other : BigInt) : BigInt
    LibGMP.add(self, self, other)

drhuffman12

# based on http://stackoverflow.com/questions/29718767/check-if-array-elements-are-power-of-two

require 'benchmark'

class Po2
  def self.via_to_s(n)
    (n.to_s(2) =~ /^10*$/) ? 0 : 1 # faster for more than about 100 numbers
  end

  def self.via_log(n)