Alternative IP notations

ip-print.js

// alternative ip notations
// https://ma.ttias.be/theres-more-than-one-way-to-write-an-ip-address/
// https://twitter.com/h43z/status/1618220318023364608

dotNotationToDec({ ip: "185.15.230.26" }); // liip.ch;
dotNotationToDec({ prefix: "185.", ip: "15.230.26" });

/*
output:
dec http://3104826906/
hex http://0xb90fe61a/
oct http://0027103763032/
185.dec http://185.1041946/
185.hex http://185.0xfe61a/
185.oct http://185.003763032/
*/

function dotNotationToDec({ ip, prefix = "" }) {
  const decimalParts = ip.split(".").map((part) => parseInt(part, 10));
  const binaryParts = decimalParts.map((part) =>
    `00000000${part.toString(2)}`.slice(-8)
  );
  const binary = binaryParts.join("");
  const decimal = parseInt(binary, 2);
  print(decimal, prefix);
}

function print(decimal, prefix = "") {
  const hex = decimal.toString(16);
  const oct = decimal.toString(8);

  // binary to decimal
  console.log(`${prefix}dec http://${prefix}${decimal}/`);
  console.log(`${prefix}hex http://${prefix}0x${hex}/`);
  console.log(`${prefix}oct http://${prefix}00${oct}/`);
}