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elsapet/primes.rb

Last active August 29, 2015 14:27
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primes.rb
n = 100
primes = (1..n).map{ |i| i if (2..i-1).map{ |j| j if i%j == 0}.compact.count == 0}.compact
puts primes.inspect # => [1, 2, 3, 5, 7, ..., 97]
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