determining the arrangement of objects in an array when using the find method

Question

determining the arrangement of objects in an array when using the find method

I am providing the following code snippet:

var users = [
    {
        name: 'Mark',
        email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="8fe2eefde4cfe2eee6e3a1ece0e2">[email protected]</a>',
        age: 28,
        address: 'England',
        val: true
},
{
    name: 'John',
    email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="f9939691978a9697b994989095d79a9694">[email protected]</a>',
    age: 25,
    address: 'USA'
    },
    {
        name: 'Tom',
        email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="ccb8a3a18ca1ada5a0e2afa3a1">[email protected]</a>',
        age: 35,
        address: 'England'
    }];

let res = users.find(
      user => (user.name === 'John' || user.name === 'Tom'
      || user.val === true),
    );

console.log(res);

How can I prioritize searching by 'name', as currently the result is showing object with name Mark. I want to get the object with name John if it exists, or Tom, and if no names are found, then search by val.

javascript

Answer 1

Answer №1

Give it a shot

let result = users.find(
      person => (person.name === 'John' || person.name === 'Tom'
      || (!person.name && person.val === true)),
    );

Answer 2

Give it a shot

let result = users.find(
      person => (person.name === 'John' || person.name === 'Tom'
      || (!person.name && person.val === true)),
    );

Answer 3

Answer №2

Avoid using the Array.find method as it only returns one value. Instead, consider using a for...of loop to populate two arrays based on specific conditions:

let highPriority = [], lowPriority = [];
for (const item of items) {
    if (item.name === 'John' || item.name === 'Tom') highPriority.push(item);
    if (item.value) lowPriority.push(item);
}

let result = highPriority.length ? highPriority : lowPriority;

Answer 4

Avoid using the Array.find method as it only returns one value. Instead, consider using a for...of loop to populate two arrays based on specific conditions:

let highPriority = [], lowPriority = [];
for (const item of items) {
    if (item.name === 'John' || item.name === 'Tom') highPriority.push(item);
    if (item.value) lowPriority.push(item);
}

let result = highPriority.length ? highPriority : lowPriority;

Answer 5

Answer №3

You are almost there, just switch .find() to .filter() and it will display all users that meet the specified criteria. There was a mistake with the name 'Johnk' instead of 'John', which is why it couldn't find the correct user due to the incorrect name and missing 'val' attribute.

var users = [
    {
        name: 'Mark',
        email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="97faf6e5fcd7faf6fefbb9f4f8fa">[email protected]</a>',
        age: 28,
        address: 'England',
        val: true
},
{
    name: 'Johnk',
    email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="4c262324223f23220c212d2520622f2321">[email protected]</a>',
    age: 25,
    address: 'USA'
    },
    {
        name: 'Tom',
        email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="9beff4f6dbf6faf2f7b5f8f4f6">[email protected]</a>',
        age: 35,
        address: 'England'
    }];

let res = users.filter(
      user => (user.name === 'John' || user.name === 'Tom'
      || user.val === true),
    );

console.log(res);

Answer 6

You are almost there, just switch .find() to .filter() and it will display all users that meet the specified criteria. There was a mistake with the name 'Johnk' instead of 'John', which is why it couldn't find the correct user due to the incorrect name and missing 'val' attribute.

var users = [
    {
        name: 'Mark',
        email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="97faf6e5fcd7faf6fefbb9f4f8fa">[email protected]</a>',
        age: 28,
        address: 'England',
        val: true
},
{
    name: 'Johnk',
    email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="4c262324223f23220c212d2520622f2321">[email protected]</a>',
    age: 25,
    address: 'USA'
    },
    {
        name: 'Tom',
        email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="9beff4f6dbf6faf2f7b5f8f4f6">[email protected]</a>',
        age: 35,
        address: 'England'
    }];

let res = users.filter(
      user => (user.name === 'John' || user.name === 'Tom'
      || user.val === true),
    );

console.log(res);

Answer 7

Answer №4

Here is a sample code that might fulfill your requirements:

var users = [
  {
    name: "Mark",
    email: "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="bccfd3c9cec2d8cfccecd6ffc5cdd8fbc6cac8">[email protected]</a>",
    age: 28,
    address: "England",
    val: true
  },
  {
    name: "John",
    email: "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="49170613131e073f38371a121ee25f5351">[email protected]</a>",
    age: 25,
    address: "USA"
  },
  {
    name: "Tom",
    email: "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="82b89fa09aa08db8b4a3adbbaeb597bab69e">[email protected]</a>",
    age: 35,
    address: "England"
  }
];

function findUser(names) {
  // utilizing `Array.reduce` to iterate through all names
  // and locate the first name in the `users` array
  var user = names.reduce((result, name) => {
    if (result) {
      return result;
    }
    return users.find(user => user.name === name) || null;
  }, null);
  
  // if user was not found, search for a user based on the value of `val`
  return user ? user : users.find(user => user.val);
}

var res1 = findUser(["John", "Tom"]);
var res2 = findUser(["Tom", "John"]);
var res3 = findUser(["Jeff"]);

console.log(res1);
console.log(res2);
console.log(res3);

References:

Array.reduce - MDN

Answer 8

Here is a sample code that might fulfill your requirements:

var users = [
  {
    name: "Mark",
    email: "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="bccfd3c9cec2d8cfccecd6ffc5cdd8fbc6cac8">[email protected]</a>",
    age: 28,
    address: "England",
    val: true
  },
  {
    name: "John",
    email: "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="49170613131e073f38371a121ee25f5351">[email protected]</a>",
    age: 25,
    address: "USA"
  },
  {
    name: "Tom",
    email: "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="82b89fa09aa08db8b4a3adbbaeb597bab69e">[email protected]</a>",
    age: 35,
    address: "England"
  }
];

function findUser(names) {
  // utilizing `Array.reduce` to iterate through all names
  // and locate the first name in the `users` array
  var user = names.reduce((result, name) => {
    if (result) {
      return result;
    }
    return users.find(user => user.name === name) || null;
  }, null);
  
  // if user was not found, search for a user based on the value of `val`
  return user ? user : users.find(user => user.val);
}

var res1 = findUser(["John", "Tom"]);
var res2 = findUser(["Tom", "John"]);
var res3 = findUser(["Jeff"]);

console.log(res1);
console.log(res2);
console.log(res3);

References:

Array.reduce - MDN

Answer 9

Answer №5

const findUserByName = users.find(user => (user.name === 'xyz')); //Find user by name

if(findUserByName == null)
{  
  const findUserByValue = users.find(user => ( user.val=== 'true')); //Find user by value
}

This code will work for both cases, insert true/false based on your requirements

Answer 10

const findUserByName = users.find(user => (user.name === 'xyz')); //Find user by name

if(findUserByName == null)
{  
  const findUserByValue = users.find(user => ( user.val=== 'true')); //Find user by value
}

This code will work for both cases, insert true/false based on your requirements

Answer 11

Answer №6

Give this a shot - it will retrieve the value if no name is found in the record

var users = [
  {
      name: 'Mark',
      email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="b2dfd3c0d9f2dfd3dbde9cd1dddf">[email protected]</a>',
      age: 28,
      address: 'England',
      val: true
},
{
  name: 'John',
  email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="18727770766b77765875797174367b7775">[email protected]</a>',
  age: 25,
  address: 'USA'
  },
  {
      name: 'Tom',
      email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="f5819a98b598949c99db969a98">[email protected]</a>',
      age: 35,
      address: 'England'
  }];
   
  function searchByNameOrValue(name, val){
    return users.filter(x=> x.name==name ? x : (x.val==val ? x : null))
  }
  console.log(searchByNameOrValue("Mark", true))

Answer 12

Give this a shot - it will retrieve the value if no name is found in the record

var users = [
  {
      name: 'Mark',
      email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="b2dfd3c0d9f2dfd3dbde9cd1dddf">[email protected]</a>',
      age: 28,
      address: 'England',
      val: true
},
{
  name: 'John',
  email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="18727770766b77765875797174367b7775">[email protected]</a>',
  age: 25,
  address: 'USA'
  },
  {
      name: 'Tom',
      email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="f5819a98b598949c99db969a98">[email protected]</a>',
      age: 35,
      address: 'England'
  }];
   
  function searchByNameOrValue(name, val){
    return users.filter(x=> x.name==name ? x : (x.val==val ? x : null))
  }
  console.log(searchByNameOrValue("Mark", true))

determining the arrangement of objects in an array when using the find method

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

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