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astronomy88/sieve_mod.rb

Last active August 29, 2015 13:57
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sieve_mod.rb
end_value = 120
#-- Using mod
a = Array(2..end_value)
limit = Math.sqrt end_value
a.each do |x|
a.delete_if do |y|
next if y <= x
y % x == 0
end
break if x >= limit
end
puts "Primes: #{a}"
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