How to check if the array inside object has elements of interest?

Question

Hi i have an object like so,

const obj = {
    id: '1',
    itemData: [
        "type1",
        "type2",
        "type3",
    ],
}

sometimes this itemData array can be empty array.

now i have to check if itemData has "type1" or "type2". if so then should return true if not false.

i have tried like below,

const isDisabled = obj.itemData.map(e => return e === "type1" || e==="type2")

but this doesnt work. could someone help me with this. thanks.

thats not valid syntax for an arrow function, remove the return --- also see <Array>.includes — skara9
– skara9, Commented Jan 23, 2022 at 20:02

score 1 · Accepted Answer · 2022-01-24 07:46:01Z

1

You can use includes with some

const obj = {
    id: '1',
    itemData: [
        "type1",
        "type2",
        "type3",
    ],
}

console.log(!obj.itemData.length || obj.itemData.some(el => ['type1', 'type2'].includes(el)));

The some() method tests whether at least one element in the array passes the test implemented by the provided function. It returns true if, in the array, it finds an element for which the provided function returns true; otherwise it returns false. It doesn't modify the array.

MDN - some

The includes() method determines whether an array includes a certain value among its entries

MDN - includes

edited Jan 24, 2022 at 7:46

answered Jan 23, 2022 at 20:02

user16540390

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2 Comments

stackuser Over a year ago

thanks. how can i also set it to true if itemData is empty array?

user16540390 Over a year ago

@stackuser I changed the code.

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