pvdb

# as a String
HOME = ENV['HOME'] || File.expand_path("~#{Etc.getlogin}")

# as a Pathname
HOME = Pathname.new(ENV['HOME'] || File.expand_path("~#{Etc.getlogin}"))

pvdb

#!/usr/bin/env ruby
# A quick and dirty implementation of an HTTP proxy server in Ruby
# because I did not want to install anything.
# 
# Copyright (C) 2009-2014 Torsten Becker <torsten.becker@gmail.com>
# 
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,

pvdb

#!/usr/bin/env ruby

require 'pp'

def ruby_repl processor = nil
  unless (processor && Proc === processor) || block_given?
    warn "Please invoke `ruby_repl` with a block or a proc..."
  else
    in_pry = Kernel.const_defined?("Pry::ColorPrinter")
    cmd_count = 0 # for use in the command prompt

pvdb

#
# This first version should work on Mac OS X and Linux, but it spawns a process
#

# the number of TCP connections owned by the process.
def Process.tcp_count() `lsof -l -n -P -p #{Process.pid} -a -i tcp | egrep -v '^COMMAND' | wc -l`.chomp.to_i ; end

pvdb

private
  def mediainfo!
    raw_response = `#{@mediainfo_binary} #{@escaped_full_filename}`
    raise "Execution of #{mediainfo_binary} failed!" unless $? == 0
    return raw_response
  end

>> require 'mediainfo'
=> true
>> mediainfo = Mediainfo.new "foo(bar).mov"

pvdb

private
  def mediainfo!
    # ANSI-C quoting: http://www.faqs.org/docs/bashman/bashref_12.html
    @escaped_full_filename = @full_filename.gsub(/\\|'/) { |c| "\\#{c}" } 
    raw_response = `#{@mediainfo_binary} $'#{@escaped_full_filename}'` 
    raise "Execution of #{mediainfo_binary} failed!" unless $? == 0
    return raw_response
  end

>> require 'mediainfo'

pvdb

private
  def mediainfo!
    `#{@mediainfo_binary} #{@full_filename}`
  end

>> require 'mediainfo'
=> true
>> mediainfo = Mediainfo.new "foo(bar).mov"
sh: -c: line 0: syntax error near unexpected token `('
sh: -c: line 0: `mediainfo foo(bar).mov'

pvdb

# question asked on aardvark.com: http://vark.com/t/b27d66 
# Is there a ruby function to find the shortest and longest string inside an array? 
# (my array will only store a bunch of stirngs)

# Here's a snippet of Ruby code that should get you going...

>> %w{ foo bar blegga very-long-string }.sort { |a, b| a.length <=> b.length }.first 
=> "foo" 
>> %w{ foo bar blegga very-long-string }.sort { |a, b| a.length <=> b.length }.last 
=> "very-long-string" 

pvdb

#
# e.g. embedded tab "\t" and newline "\n" characters
#

>> puts 'first\tsecond\tthird'
first\tsecond\tthird
=> nil
>> puts "first\tsecond\tthird"
first	second	third
=> nil

pvdb

#
#          ActiveRecord SQL Logging on the Rails Console
#          ---------------------------------------------
#
# Various blog posts out there show you how to log all SQL statements
# executed by ActiveRecord to STDOUT when you're in a Rails console:
# 
#  * http://robots.thoughtbot.com/post/159806033/irb-script-console-tips
#  * http://weblog.jamisbuck.org/2007/1/8/watching-activerecord-do-it-s-thing
#  * http://toolmantim.com/thoughts/system_wide_script_console_logging