Remove duplicate objects from array

/**
 *
 * @param {Object} firstObj
 * @param {Object} secondObj
 * @return {Boolean}
 */
function checkIfEqualObjects(firstObj, secondObj) {
  // Find the keys and their values in both of the objects
  const firstArr = Object.entries(firstObj),
    secondArr = Object.entries(secondObj);

  // Check if both objects have same amount of key/value pairs
  if (firstArr.length !== secondArr.length) return false;

  // Iterate over first array
  for (let i = 0; i < firstArr.length; i++) {
    const firstSub = firstArr[i];

    
    // Iterate over second array
    for (let j = 0; j < secondArr.length; j++) {
      const secondSub = secondArr[j];
      if (firstSub[0] === secondSub[0] && firstSub[1] === secondSub[1]) {
        //   If both sub arrays are equal then break the inner loop
        break;
      } else if (j === secondArr.length - 1) {
        //   If no matches were found till the last element then there's no equality
        return false;
      }
    }


  }

  return true;
}

/**
 *
 * @param {Array} arr An array of objects
 * @return {Array} An array containing unique objects
 */
function removeDuplicates(arr) {
  const length = arr.length;

  //   Iterate over given array
  for (let i = 0; i < length; i++) {
    //   If a duplicate has already been removed from this index then continue
    if (arr[i] === null) continue;

    // Compare the current objects with objects coming after it
    for (let j = i + 1; j < length; j++) {
      if (arr[j] === null) continue;

      if (checkIfEqualObjects(arr[i], arr[j])) {
        //   Remove duplicate
        arr[j] = null;
      }
    }
  }
  return arr.filter((el) => el !== null);
}

console.log(
  removeDuplicates([
    { name: "ali", age: 15 },
    { al: "ali", pk: 15 },
    { ok: "ahmad", li: 13 },
    { name: "something", age: 24 },
    { name: "ali", age: 15 },
  ])
);