What's the output?
function getFruit(fruits) {
console.log(fruits?.[1]?.[1])
}
getFruit([['馃崐', '馃崒'], ['馃崓']])
getFruit()
getFruit([['馃崓'], ['馃崐', '馃崒']])You missed this one before
The ? allows us to optionally access deeper nested properties within objects. We're trying to log the item on index 1 within the subarray that's on index 1 of the fruits array. If the subarray on index 1 in the fruits array doesn't exist, it'll simply return undefined. If the subarray on index 1 in the fruits array exists, but this subarray doesn't have an item on its 1 index, it'll also return undefined.
First, we're trying to log the second item in the ['馃崓'] subarray of [['馃崐', '馃崒'], ['馃崓']]. This subarray only contains one item, which means there is no item on index 1, and returns undefined.
Then, we're invoking the getFruits function without passing a value as an argument, which means that fruits has a value of undefined by default. Since we're conditionally chaining the item on index 1 offruits, it returns undefined since this item on index 1 does not exist.
Lastly, we're trying to log the second item in the ['馃崐', '馃崒'] subarray of ['馃崓'], ['馃崐', '馃崒']. The item on index 1 within this subarray is 馃崒, which gets logged.
Question 146 路 see the original (opens in a new tab)