From: lucsky@... (Luc Heinrich)
Date: 2005-01-10T00:31:24+09:00
Subject: Re: [QUIZ] LCD Numbers (#14)

Luc Heinrich <lucsky@mac.com> wrote:

> Here's my solution:

Woops, found a bug: displaying the same digit multiple times wasn't
working, so doing 'lcd.rb 55' for example would render garbage.

Here's my fixed (and slightly updated) solution:

**************************** [begin code ] ****************************

#!/usr/local/bin/ruby -w

require 'getoptlong'

# ----------------------------------------------------------------------

class Array
    
    def deep_clone
        Marshal::load(Marshal.dump(self))
    end
    
end

# ----------------------------------------------------------------------

class Digit
    
    S = " "
    H = "-"
    V = "|"

    @@segments =
    [
        [ [S,H,S], [V,S,V], [S,S,S], [V,S,V], [S,H,S] ], # 0
        [ [S,S,S], [S,S,V], [S,S,S], [S,S,V], [S,S,S] ], # 1
        [ [S,H,S], [S,S,V], [S,H,S], [V,S,S], [S,H,S] ], # 2
        [ [S,H,S], [S,S,V], [S,H,S], [S,S,V], [S,H,S] ], # 3
        [ [S,S,S], [V,S,V], [S,H,S], [S,S,V], [S,S,S] ], # 4
        [ [S,H,S], [V,S,S], [S,H,S], [S,S,V], [S,H,S] ], # 5
        [ [S,H,S], [V,S,S], [S,H,S], [V,S,V], [S,H,S] ], # 6
        [ [S,H,S], [S,S,V], [S,S,S], [S,S,V], [S,S,S] ], # 7
        [ [S,H,S], [V,S,V], [S,H,S], [V,S,V], [S,H,S] ], # 8
        [ [S,H,S], [V,S,V], [S,H,S], [S,S,V], [S,H,S] ]  # 9
    ]
        
    attr_reader :height
    
    def initialize( num, size )
        @matrix = @@segments[ num ].deep_clone
        @height = @matrix.size
        self.scale_to_size( size ) if size > 1
    end
    
    def scale_to_size( size )
        t = size - 1
        @matrix.each { |l| t.times { l.insert(-2, S) } }
        @matrix.each { |l| l.fill(H, l.index(H), size) if l.include?(H)
}
        t.times { @matrix.insert( 1, @matrix[1]) }
        t.times { @matrix.insert(-2, @matrix[-2]) }
        @height = @matrix.size
    end
    
    def display_line( line )
        print @matrix[ line ], " "
    end
    
end

# ----------------------------------------------------------------------

class LCD
    
    def initialize( num, size=1 )
        @digits = Array.new
        num.each_byte { |b| @digits << Digit.new( b.to_i - 48, size ) }
    end
    
    def display
        for line in 0...@digits.first.height
            @digits.each { |d| d.display_line( line ) }
            puts
        end
    end
    
end

# ----------------------------------------------------------------------

def print_usage( message=nil )
    puts "Usage: lcd [-s size] digits"
end

# ----------------------------------------------------------------------

print_usage & exit if ARGV.empty?

size = 2
opts = GetoptLong.new( ["--size", "-s", GetoptLong::REQUIRED_ARGUMENT] )
opts.each { |opt, val| size = val.to_i if opt == "--size" }

print_usage & exit if ARGV.empty?

digits = ARGV[0].gsub( /[^0-9]/, "" )
lcd = LCD.new( digits, size )
lcd.display

# ----------------------------------------------------------------------

**************************** [end code ] ****************************

-- 
Luc Heinrich - lucsky@mac.com