Ways to verify if any items in an array are present in a different array

Question

Ways to verify if any items in an array are present in a different array

I have two arrays of objects and need to determine if certain items are contained in another array. If any of them are not found, the result should be false.

 const arr = [
            {full_name: 'Test'},
            {full_name: 'Test1'},
            {full_name: 'Test2'},
        ]

        const arr1 = [
            {full_name: 'Test'},
            {full_name: 'Test1'},
            {full_name: 'Test2'},
            {full_name: 'Test3'},
            {full_name: 'Test4'},
            {full_name: 'Test5'},
            {full_name: 'Test6'},
        ]

If arr1 contains Test, Test1, and Test2, the result will be true. If any of them are missing, the result will be false.

An operator may be needed for this task.

javascript arrays

Answer 1

Answer №1

Here is a unique solution using the array functions every and some:

const array1 = [
    {full_name: 'Test'},
    {full_name: 'Test1'},
    {full_name: 'Test6'},
]

const array2 = [
    {full_name: 'Test'},
    {full_name: 'Test1'},
    {full_name: 'Test2'},
    {full_name: 'Test3'},
    {full_name: 'Test4'},
    {full_name: 'Test5'},
    {full_name: 'Test6'},
]

console.log(array1.every(item => {
  return array2.some( element => element.full_name == item.full_name)
}))

Answer 2

Here is a unique solution using the array functions every and some:

const array1 = [
    {full_name: 'Test'},
    {full_name: 'Test1'},
    {full_name: 'Test6'},
]

const array2 = [
    {full_name: 'Test'},
    {full_name: 'Test1'},
    {full_name: 'Test2'},
    {full_name: 'Test3'},
    {full_name: 'Test4'},
    {full_name: 'Test5'},
    {full_name: 'Test6'},
]

console.log(array1.every(item => {
  return array2.some( element => element.full_name == item.full_name)
}))

Ways to verify if any items in an array are present in a different array

Answer №1

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