Q2. of BORQ - LCD display

This is an old one, pretty famously seen on uva, etc. I found Choice to be better than OptParse, as said in Choice docs - it like writing poems for command-line parsing :D

	# Author: Abhishek Mishra <ideamonk@gmail.com>
	require 'rubygems'
	require 'choice'
	Choice.options do
	banner 'q2_lcd_numbers.rb [-shv] string'
	separator 'Optional:'
	option :size do
	short '-s'
	desc 'digit size'
	cast Integer
	default 1
	end
	separator 'Common:'
	option :help do
	short '-h'
	long '--help'
	desc 'Show this message.'
	end
	option :version do
	short '-v'
	long '--version'
	desc 'Show version.'
	action do
	puts 'LCD generator 0.1'
	exit
	end
	end
	end
	def paint_map(map,digit,size,start)
	# upper, mid, bottom
	for i in (start+1)...(start+size+1)
	if $digits[digit][0] == 1
	map[[0,i]] = 2
	end
	if $digits[digit][3] == 1
	map[[0 + size + 1,i]] = 2
	end
	if $digits[digit][6] == 1
	map[[0 + size*2 + 2,i]] = 2
	end
	end
	# verticals
	for i in 1...size+1
	if $digits[digit][1] == 1
	map[[i,0+start]] = 1
	end
	if $digits[digit][2] == 1
	map[[i,size+1+start]] = 1
	end
	if $digits[digit][4] == 1
	map[[i+size+1,0+start]] = 1
	end
	if $digits[digit][5] == 1
	map[[i+size+1,size+1+start]] = 1
	end
	end
	end
	def print_map(map, size, total_digits)
	for j in 0...(size*2+3)
	for i in 0...(total_digits*(size+3))
	if map[[j,i]] == 2
	print '-'
	elsif map[[j,i]] == 1
	print '|'
	else
	print ' '
	end
	end
	puts ''
	end
	end
	def drive_paint(map, string, size)
	i = 0
	j = 0
	while (i<string.size*(size+3))
	paint_map(map,string[j..j].to_i,size,i)
	i += size+3
	j += 1
	end
	end
	# _ 0
	# | | 1 2
	# - 3
	# | | 4 5
	# - 6
	$digits = [
	[1,1,1,0,1,1,1], [0,0,1,0,0,1,0], # 0 1
	[1,0,1,1,1,0,1], [1,0,1,1,0,1,1], # 2 3
	[0,1,1,1,0,1,0], [1,1,0,1,0,1,1], # 4 5
	[1,1,0,1,1,1,1], [1,0,1,0,0,1,0], # 6 7
	[1,1,1,1,1,1,1], [1,1,1,1,0,1,0], # 8 9
	]
	string = ARGV[-1]
	size = Choice.choices[:size]
	digitmap = {}
	drive_paint(digitmap, string, size)
	print_map(digitmap, size, string.size)

view raw q2_borq_lcd.rb hosted with ❤ by GitHub

Initially I was doing a string[j].chr.to_i which seemed like a required bullshit, I wish it could've been string[j].to_i but string[i] gives back a decimal. Now one could talk about the C style '5'-'0' conversion to number, but then, that machine dependent (think ascii, ebcdic, etc). The slightly more ruby-ish way - string[j..j].to_i :)

Here's my number -

abhishekmishra@mbp [~/code/BORQ]> ruby q2_lcd_numbers.rb -s 3 9535009187
 ---   ---   ---   ---   ---   ---   ---         ---   ---
|   | |         | |     |   | |   | |   |     | |   |     |
|   | |         | |     |   | |   | |   |     | |   |     |
|   | |         | |     |   | |   | |   |     | |   |     |
 ---   ---   ---   ---               ---         ---
    |     |     |     | |   | |   |     |     | |   |     |
    |     |     |     | |   | |   |     |     | |   |     |
    |     |     |     | |   | |   |     |     | |   |     |
       ---   ---   ---   ---   ---               ---

Surprisingly the PyMos core code is 180 lines while this reaches upto 108. Python => more results per line? The absence of 'end' in python is one big reason for this. Besides I dont find my ruby code so ruby-ish at this stage.