सूची तुलना - दो सूचियों की तुलना और अंतर खोजें ऑनलाइन

// List comparison using JavaScript Set operations
function compareLists(listA, listB, options = {}) {
  const { caseSensitive = true, trimWhitespace = true } = options;

  const normalize = (item) => {
    let result = item;
    if (trimWhitespace) result = result.trim();
    if (!caseSensitive) result = result.toLowerCase();
    return result;
  };

  const itemsA = listA.map(normalize).filter(Boolean);
  const itemsB = listB.map(normalize).filter(Boolean);

  const setA = new Set(itemsA);
  const setB = new Set(itemsB);

  const onlyInA = [...setA].filter((item) => !setB.has(item));
  const onlyInB = [...setB].filter((item) => !setA.has(item));
  const intersection = [...setA].filter((item) => setB.has(item));
  const union = [...new Set([...setA, ...setB])];
  const symmetricDiff = [...onlyInA, ...onlyInB];

  const jaccardIndex = union.length > 0
    ? intersection.length / union.length : 0;

  return { onlyInA, onlyInB, intersection, union, symmetricDiff,
    stats: { jaccardIndex: Math.round(jaccardIndex * 1000) / 1000 } };
}

// Usage
const a = ['apple', 'banana', 'cherry', 'date'];
const b = ['banana', 'date', 'elderberry', 'fig'];
const result = compareLists(a, b);
console.log('Only in A:', result.onlyInA);
// ['apple', 'cherry']
console.log('Intersection:', result.intersection);
// ['banana', 'date']