all_any_shortcircuit

1.9.3p448 :002 > a = [-> { puts 1; true }, -> { puts 2; false}, -> { puts 3; false }]
 => [#<Proc:0x007fe5c41a8f68@(irb):2 (lambda)>, #<Proc:0x007fe5c41a8f18@(irb):2 (lambda)>, #<Proc:0x007fe5c41a8ef0@(irb):2 (lambda)>]
1.9.3p448 :003 > a.all?(&:call)
1
2
 => false
1.9.3p448 :004 > a = [-> { puts 1; false }, -> { puts 2; true}, -> { puts 3; false }]
 => [#<Proc:0x007fe5c4276620@(irb):4 (lambda)>, #<Proc:0x007fe5c42765d0@(irb):4 (lambda)>, #<Proc:0x007fe5c42765a8@(irb):4 (lambda)>]
1.9.3p448 :005 > a.any?(&:call)
1
2
 => true

count.rb

require 'benchmark'

computed  = 'aaaa_aaaaaa'
presented = 'aaaaaaaaaaa'

count_a, count_b = 0, 0

computed.chars.zip(presented.chars).map {|x,y| x == y }.all? { |c| count_a += 1; c }
computed.chars.zip(presented.chars).inject(true) { |value, (x,y)| count_b += 1; value && (x == y) }

puts "overall #{presented.size}"
puts "map.all? #{count_a}"
puts "inject #{count_b}"

# => 
#  overall 11 
#  map.all? 5
#  inject 11