[Solved] Javascript array arrange parent and child as array?

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My working solution:

let final = [];
let sample = [
  { tribe_id: 1, tribe_name: "Tribe A", squad_id: 1, squad_name: "Squad A" },
  { tribe_id: 1, tribe_name: "Tribe A", squad_id: 2, squad_name: "Squad B" },
  { tribe_id: 2, tribe_name: "Tribe B", squad_id: 3, squad_name: "Squad C" }
];
console.log(sample);

const uniqueTribes = sample.reduce((acc, current) => {
  const x = acc.find(item => item.tribe_id === current.tribe_id);
  if (!x) {
    // return acc.concat([current]);
    return acc.concat([{ "tribe_id": current.tribe_id, "tribe_name": current.tribe_name, "squads": [] }]);
  }
  return acc;
}, []);
// console.log(uniqueTribes);

for (let i = 0; i < uniqueTribes.length; i++) {

  let uniqueTribeName = uniqueTribes[i].tribe_name;
  let uniqueTribeId = uniqueTribes[i].tribe_id;

  for (let x = 0; x < sample.length; x++) {
    let squadName = sample[x].squad_name;
    let squadId = sample[x].squad_id;

    if (uniqueTribeId == sample[x].tribe_id) {
      // uniqueTribes[i].squads.push({ squad_id: sample[x].squad_id, squad_name: sample[x].squad_name });
      uniqueTribes[i].squads.push({ squad_id: squadId, squad_name: squadName });

    }
  }
  // let uniqueTribeId = sample[i].squad_name;
}
console.log(uniqueTribes);



let tribe = [];

// console.log(tribe);

let desiredFormat = [
  {
    tribe_id: 1, tribe_name: "Tribe A", squads: [
      {squad_id: 1, squad_name: "Squad A"},
      {squad_id: 2, squad_name: "Squad B"}
    ]
  },
  { 
    tribe_id: 2, tribe_name: "Tribe B", squads: [
      {squad_id: 3, squad_name: "Squad C"}
    ]
  }
];

solved Javascript array arrange parent and child as array?