panarch

const items = ['Foo', 'Bar', 'Dog', 'Cat', 'Tea'];
const indexes = [0, 1, 2, 3, 4];

console.log('');
console.log('-------------------');
console.log('Pick 2 items using flatMap');
const picked = indexes.flatMap(i =>
  indexes
    .slice(i + 1)
    .map(j => [items[i], items[j]])