Cassidy Interview QOTW: 7/28

cassidoo_7-28.js

// Given an array of side lengths, write a function to determine 
// they can form a hexagon with three side-length pairs (as in, 
// three pairs of equal sides needed). Return true if possible.

function canFormHexagon(sides) {
  if (!Array.isArray(sides) || sides.length !== 6) {
    return false;
  }

  const frequencyMap = {};
  for (const side of sides) {
    frequencyMap[side] = (frequencyMap[side] || 0) + 1;
  }

  const counts = Object.values(frequencyMap);
  if (counts.length !== 3) {
    return false;
  }

  return counts.every(count => count === 2);
}