Check in structured array if exists

[Costas]

// https://stackoverflow.com/a/48538239/1320686

var datas= [
  ["aaa", "bbb"],
  ["ddd", "eee"]
];

function exists(arr, search) {
    return arr.some(row => row.includes(search));
}

console.log(exists(datas, 'ddd'));

On structured (example with property extrasPrices) array as

//adding the property name
function exists(arr, search) {
	return arr.some(row => row.extras_name.includes(search));
}

using includes is the same as indexOf, is not the complete string of the array property but a part of.

JS is case sensitive, we dont need it

function exists(arr, search) {
	return arr.some(row => row.extras_name.toLowerCase() == search.toLowerCase() );
}