Instructions for removing a single key value pair from every object in an array and transferring it to a designated object within the same array

Question

Instructions for removing a single key value pair from every object in an array and transferring it to a designated object within the same array

I need to update an array of objects by adding a key and value (e.g., age:15) to an object with the name email, while removing the age property from other objects in the array.

[
  {
    name: 'test',
    lname: 'last',
    age: 5
  },
  {
    name: 'test1',
    lname: 'last1',
    age: 15
  },
  {
    name: 'email',
    lname: 'last'
  }
]

For example, I want the following output:

[
  {
    name: 'test',
    lname: 'last'
  },
  {
    name: 'test1',
    lname: 'last1'
  },
  {
    name: 'email',
    lname: 'last',
    age: 15
  }
]

Thank you

javascript arrays object

Answer 1

Answer №1

One approach you can take is to identify the position of the object with a name attribute set to "email". After locating this object, you can introduce a new property labeled age and assign it the desired age value. To complete the process, utilize the filter function to eliminate items that do not have a name of "email" and remove the age property.

var data = [ { name: 'test', lname: 'last', age: 5 }, { name: 'test1', lname: 'last1', age: 15 }, { name: 'email', lname: 'last', }, ]

function myFunction(age) {
  let indexOfEmail = data.findIndex(element => element.name == "email")
  if (indexOfEmail > -1) {
    data[indexOfEmail].age = age
    data.filter(element => element.name !== "email").map(sub => delete sub['age'])
  }
}

myFunction(15)
console.log(data)

Answer 2

One approach you can take is to identify the position of the object with a name attribute set to "email". After locating this object, you can introduce a new property labeled age and assign it the desired age value. To complete the process, utilize the filter function to eliminate items that do not have a name of "email" and remove the age property.

var data = [ { name: 'test', lname: 'last', age: 5 }, { name: 'test1', lname: 'last1', age: 15 }, { name: 'email', lname: 'last', }, ]

function myFunction(age) {
  let indexOfEmail = data.findIndex(element => element.name == "email")
  if (indexOfEmail > -1) {
    data[indexOfEmail].age = age
    data.filter(element => element.name !== "email").map(sub => delete sub['age'])
  }
}

myFunction(15)
console.log(data)

Answer 3

Answer №2

If you want to achieve this, you can utilize the map method in the following way:

const info = [
  {
    firstName: 'John',
    lastName: 'Doe',
    age: 25
  },
  {
    firstName: 'Jane',
    lastName: 'Smith',
    age: 35
  },
  {
    firstName: 'Sarah',
    lastName: 'Johnson',
  },
];
const updatedInfo = info.map(({age, ...rest})=> rest.firstName == 'Sarah' ? {...rest, age: 30} : rest)
console.log(updatedInfo);

Answer 4

If you want to achieve this, you can utilize the map method in the following way:

const info = [
  {
    firstName: 'John',
    lastName: 'Doe',
    age: 25
  },
  {
    firstName: 'Jane',
    lastName: 'Smith',
    age: 35
  },
  {
    firstName: 'Sarah',
    lastName: 'Johnson',
  },
];
const updatedInfo = info.map(({age, ...rest})=> rest.firstName == 'Sarah' ? {...rest, age: 30} : rest)
console.log(updatedInfo);

Answer 5

Answer №3

Here is an example of how you can achieve this:


const items = [
  {
    name: 'test',
    lname: 'last',
    age: 5
  },
  {
    name: 'test1',
    lname: 'last1',
    age: 15
  },
  {
    name: 'email',
    lname: 'last',
  },
];

const newItems = items.filter((item) => {
    if (item.name.includes("email")) {
      return (item.age = 15);
    }
    if (JSON.stringify(items).includes("email")) {
      delete item.age;
    }
    return item;
});

console.log(newItems);

Answer 6

Here is an example of how you can achieve this:


const items = [
  {
    name: 'test',
    lname: 'last',
    age: 5
  },
  {
    name: 'test1',
    lname: 'last1',
    age: 15
  },
  {
    name: 'email',
    lname: 'last',
  },
];

const newItems = items.filter((item) => {
    if (item.name.includes("email")) {
      return (item.age = 15);
    }
    if (JSON.stringify(items).includes("email")) {
      delete item.age;
    }
    return item;
});

console.log(newItems);

Instructions for removing a single key value pair from every object in an array and transferring it to a designated object within the same array

Answer №1

Answer №2

Answer №3

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