ruby_practice/ipToInt32.rb at master · maalur/ruby_practice · GitHub

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=begin

	Source:  Codewars
	Difficulty:  6 kyu
	Title:  IPv4 to int32

	Description:
		Take the following IPv4 address: 128.32.10.1
		This address has 4 octets where each octet is a single byte (or 8 bits).

		1st octet 128 has the binary representation: 10000000
		2nd octet 32 has the binary representation: 00100000
		3rd octet 10 has the binary representation: 00001010
		4th octet 1 has the binary representation: 00000001

		So 128.32.10.1 == 10000000.00100000.00001010.00000001

		Because the above IP address has 32 bits, we can represent it as the 32 bit number: 2149583361.

		Write a function ip_to_int32(ip) that takes an IPv4 address and returns a 32 bit number.

	Example:
		ip_to_int32("128.32.10.1")  =>  2149583361

=end


def ip_to_int32(ip)
  ("%08b%08b%08b%08b" % ip.split('.')).to_i(2)
end