dskecse · December 21, 2023 09:53
diff --git a/bespoke.rb b/bespoke.rb
 def prime?(n)
  return false if n <= 1

  i = 2
  while i * i <= n
    return false if n % i == 0
    i += 1
  end
  true
 end

 prime? 0 # => false
 prime? 1 # => false
 prime? 2 # => true
 prime? 3 # => true
 prime? 4 # => false
diff --git a/stdlib.rb b/stdlib.rb
 require "prime"

 0.prime? # => false
 1.prime? # => false
 2.prime? # => true
 3.prime? # => true
 4.prime? # => false