student-assignment-solution-2.js

const students = [
  {
    id: '1',
    isSelected: true,
    name: 'Mike',
  },
  {
    id: '2',
    isSelected: false,
    name: 'Jane',
  },
  {
    id: '3',
    isSelected: false,
    name: 'Suren',
  },
];

const allStudents = {};
students.forEach((item) => {
  allStudents[item.id] = item;
});

let updatedStudents = { ...allStudents };
const handleAssignStudentChange = (studentId, isSelected) => {
  updatedStudents[studentId] = {
    ...updatedStudents[studentId],
    isSelected,
  };
};

const getIsChanged = (students, updatedStudents) => {
  const studentsIds = Object.keys(students);
  const studentsLen = studentsIds.length;

  for (let i = 0; i < studentsLen; i++) {
    const id = studentsIds[i];
    console.log(
      `${students[id].isSelected}: ${updatedStudents[id].isSelected}`
    );
    if (students[id].isSelected !== updatedStudents[id].isSelected) {
      return true;
    }
  }
  return false;
};

console.log(updatedStudents);
let isChanged = getIsChanged(allStudents, updatedStudents);
console.log({ isChanged }); // false
handleAssignStudentChange('2', true);
isChanged = getIsChanged(allStudents, updatedStudents);
console.log(updatedStudents);
console.log({ isChanged }); // true