Hi I want to check if "arr" includes one of the sub arrays of "arrNested" and get a boolean value.
I want something like arrNested.includes(arr) that works for nested arrays
console.log(arrNested.includes(arr)) returns false and I don't know why
let arr = [1,2,3]
let arrNested = [
[1,2,3],
[4,5,6],
[7,8,9],
]
Use Array.some().
If the order matters, use:
let arr = [1, 2, 3]
let arrNested = [
[1, 2, 3],
[4, 5, 6],
[7, 8, 9],
]
function includes(a, b) {
return a.some(e => e.toString() == b.toString());
}
console.log(includes(arrNested, arr));If the order does not matter, first sort, then compare:
let arr = [1, 2, 3]
let arrNested = [
[1, 2, 3],
[4, 5, 6],
[7, 8, 9],
]
function includes(a, b) {
var s = b.sort().toString();
return a.some(e => e.sort().toString() == s);
}
console.log(includes(arrNested, arr));
[1, 2, 3] == [3, 2, 1]?console.log(arrNested.includes(arr))returnsfalseand I don’t know why” — duplicate of Why can't I use Array#includes for a nested array?.