Tips for rearranging an item to the beginning of an array at index 0

Question

Tips for rearranging an item to the beginning of an array at index 0

What is the most efficient way to delete a specific object from an array and move it to the beginning?

I have attempted using regular methods such as finding the index, manually splicing, and then moving the object to the top.

farmer: [
{
id:1,
name: "name 1"
},
{
id:2,
name: "name 2"
},
{
id:3,
name: "name 3"
}
]

If I choose the farmer with id: 2, I want to relocate it to the top.

javascript arrays object

Answer 1

Answer №1

const index = heroes.findIndex(hero => hero.id === 4)
heroes.unshift(heroes.splice(index,1)[0])

Answer 2

const index = heroes.findIndex(hero => hero.id === 4)
heroes.unshift(heroes.splice(index,1)[0])

Answer 3

Answer №2

To manipulate an array using JavaScript, you can utilize the Array.reduce() method along with the Array.unshift() and Array.push() functions as demonstrated in the following example:

var farmer = [
  {id: 1, name: "name 1"},
  {id: 2, name: "name 2"},
  {id: 3, name: "name 3"}
];
var searchedId = 2;

var result = farmer.reduce(function(carry, item) {
  if (item.id === searchedId) {
     carry.unshift(item);
  } else {
     carry.push(item);
  }
  return carry;
}, []);

console.log(result);

Answer 4

To manipulate an array using JavaScript, you can utilize the Array.reduce() method along with the Array.unshift() and Array.push() functions as demonstrated in the following example:

var farmer = [
  {id: 1, name: "name 1"},
  {id: 2, name: "name 2"},
  {id: 3, name: "name 3"}
];
var searchedId = 2;

var result = farmer.reduce(function(carry, item) {
  if (item.id === searchedId) {
     carry.unshift(item);
  } else {
     carry.push(item);
  }
  return carry;
}, []);

console.log(result);

Answer 5

Answer №3

When it comes to working with the JavaScript standard library, one common practice involves finding an element by its id, extracting it, and then inserting it into a new position.

let myArray = [{
id: 1
}, {
id: 2
}, {
id: 3
}]

function moveItemById (array, id, position) {
let elementIndex = array.findIndex((el) => {
  return el.id === id
  })
  if (!elementIndex) {
  return
  }
  
  array.splice(position, 0, array.splice(elementIndex, 1)[0])
}

moveItemById(myArray, 2, 0)

Answer 6

When it comes to working with the JavaScript standard library, one common practice involves finding an element by its id, extracting it, and then inserting it into a new position.

let myArray = [{
id: 1
}, {
id: 2
}, {
id: 3
}]

function moveItemById (array, id, position) {
let elementIndex = array.findIndex((el) => {
  return el.id === id
  })
  if (!elementIndex) {
  return
  }
  
  array.splice(position, 0, array.splice(elementIndex, 1)[0])
}

moveItemById(myArray, 2, 0)

Answer 7

Answer №4

Here's the code snippet you requested:

var farmer =  [
    {
id: 1,
name: "name 1"
},
{
id: 2,
name: "name 2"
},
{
id: 3,
name: "name 3"
}
]


farmerNew = farmer.filter(item => item.id !== 2);
selectedFarmer = farmer.filter(item => item.id === 2)[0];
farmerNew.unshift(selectedFarmer);
farmer = farmerNew
console.log(farmer)

Answer 8

Here's the code snippet you requested:

var farmer =  [
    {
id: 1,
name: "name 1"
},
{
id: 2,
name: "name 2"
},
{
id: 3,
name: "name 3"
}
]


farmerNew = farmer.filter(item => item.id !== 2);
selectedFarmer = farmer.filter(item => item.id === 2)[0];
farmerNew.unshift(selectedFarmer);
farmer = farmerNew
console.log(farmer)

Tips for rearranging an item to the beginning of an array at index 0

Answer №1

Answer №2

Answer №3

Answer №4

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