alphadir.rb

#!/usr/bin/env ruby

#
# NATO phonetic alphabet
#

def usage
	puts "Usage: " + File.basename($0) + " num1 [num2]"
	puts ""
	puts "num1 - This number expresses an opening in table."
	puts "num2 - This number expresses number of times in table."
	puts "When you omit the num2, the practice number of times is regarded only once."
	puts "POINT TO NOTICE:"
	puts "    It is necessary for num1 and num2 to be greater than 0."
	puts "    num1 has to be greater than 0."
	puts "    In addition, sum (num1 + num2) has to be less than or equal 26."
	puts ""
end

## {{{
table = { 1=>"alpha", 2=>"bravo", 3=>"charlie", 4=>"delta", 5=>"echo", 6=>"foxtrot", 7=>"golf",
	8=>"hotel", 9=>"india", 10=>"juliett", 11=>"kilo", 12=>"lima", 13=>"mike", 14=>"november",
	15=>"oscar", 16=>"papa", 17=>"quebec", 18=>"romeo", 19=>"sierra", 20=>"tango", 21=>"uniform",
	22=>"victor", 23=>"whiskey", 24=>"x-ray", 25=>"yankee", 26=>"zulu" }

num1 = ARGV[0].to_i
if ARGV[1] == nil then
	num2 = 0
else
	num2 = ARGV[1].to_i
end
## }}}

if num1 > 26 || num1 == 0 || num1 + num2 >27 then
	usage
	exit 1
end

if ARGV.size == 1 then
	if ! File.exist?(table[num1]) then
		Dir.mkdir(table[num1])
		exit 0
	else
		puts table[num1] + ": Already exist"
		exit 1
	end
elsif ARGV.size == 2 then
	num2.times {
		if ! File.exist?(table[num1]) then
			Dir.mkdir(table[num1])
		else
			puts table[num1] + ": Already exist"
		end
		num1 += 1
	}
	exit 0
else
	usage
end