LCD.rb

# LCD.rb
# Execution : ruby LCD.rb -s 2 12345

### option parsing ###

s = $*.size > 1 ? $*.slice!(0..1)[1] : '2'
num = $*[0]

unless s =~ /^[1-9]\d*$/ and num =~ /^\d+$/
	puts "Usage: #$0 [-s SIZE] DIGITS"
	exit
end
s = s.to_i

### rendering ###

horizontal_hyphen = ' ' + '-'*s + ' ' # ' - '
vertical_dual_pipe = ['|' + ' '*s + '|']*s # '| |'
vertical_single_pipe_left = ['|' + ' '*s + ' ']*s # '| '
vertical_single_pipe_right = [' ' + ' '*s + '|']*s # ' |'
blank_key = ' ' * horizontal_hyphen.size # ' '

lcd = [
	[horizontal_hyphen] << vertical_dual_pipe << blank_key << vertical_dual_pipe << horizontal_hyphen, # 0
	[blank_key] << vertical_single_pipe_right << blank_key << vertical_single_pipe_right << blank_key, # 1
	[horizontal_hyphen] << vertical_single_pipe_right << horizontal_hyphen << vertical_single_pipe_left << horizontal_hyphen, # 2
	[horizontal_hyphen] << vertical_single_pipe_right << horizontal_hyphen << vertical_single_pipe_right << horizontal_hyphen, # 3
	[blank_key] << vertical_dual_pipe << horizontal_hyphen << vertical_single_pipe_right << blank_key, # 4
	[horizontal_hyphen] << vertical_single_pipe_left << horizontal_hyphen << vertical_single_pipe_right << horizontal_hyphen, # 5
	[horizontal_hyphen] << vertical_single_pipe_left << horizontal_hyphen << vertical_dual_pipe << horizontal_hyphen, # 6
	[horizontal_hyphen] << vertical_single_pipe_right << blank_key << vertical_single_pipe_right << blank_key, # 7
	[horizontal_hyphen] << vertical_dual_pipe << horizontal_hyphen << vertical_dual_pipe << horizontal_hyphen, # 8
	[horizontal_hyphen] << vertical_dual_pipe << horizontal_hyphen << vertical_single_pipe_right << horizontal_hyphen, # 9
]
### output ###

(0...(2*s+3)).each do |i|
	puts num.chars.collect { |n| lcd[n.to_i].flatten[i] }.join ' '
end