const log = console.log.bind(console);

const individuals = [
  { id: 0, name: "Xiao Ming" },
  { id: 1, name: "Xiao Zhang" },
  { id: 2, name: "Xiao Li" },
  { id: 3, name: "Xiao Sun" },
  { id: 1, name: "Xiao Zhou" },
  { id: 2, name: "Xiao Chen" }
];

const seen = {};

const uniqueIndividuals = individuals.reduce((accumulator, current) => {
  if (!seen[current.id]) {
    seen[current.id] = true;
    accumulator.push(current);
  }
  return accumulator;
}, []);

log(uniqueIndividuals);

const sourceArray = [
  { id: 1, name: "Zhang San", age: 18, contactId: 1 },
  { id: 1, name: "Zhang San", age: 18, contactId: 2 },
  { id: 1, name: "Zhang San", age: 18, contactId: 3 },
  { id: 1, name: "Zhang San", age: 18, contactId: 14 },
  { id: 1, name: "Zhang San", age: 18, contactId: 3 },
  { id: 1, name: "Zhang San", age: 18, contactId: 2 },
  { id: 1, name: "Zhang San", age: 18, contactId: 1 }
];

const resultArray = [];

// jQuery approach
$.each(sourceArray, function(index, item) {
  let exists = false;
  $.each(resultArray, function(innerIndex, existingItem) {
    if (existingItem.contactId === item.contactId) {
      exists = true;
      return false; // break loop
    }
  });
  if (!exists) {
    resultArray.push(item);
  }
});

// Vanilla JavaScript approach
for (let i = 0; i < sourceArray.length; i++) {
  let found = false;
  for (let j = 0; j < resultArray.length; j++) {
    if (sourceArray[i].id === resultArray[j].id) {
      found = true;
      break;
    }
  }
  if (!found) {
    resultArray.push(sourceArray[i]);
  }
}

function findMatchingUser() {
  for (let i = 0; i < self.tableDataUser.length; i++) {
    if (self.radioUser.indexOf(self.tableDataUser[i].userId) > -1) {
      return self.tableDataUser[i];
    }
  }
  return null;
}