Array.prototype.slice()
to get an array containing the nth element at the first place.undefined
.n
, to get the first element of the array.const nthElement = (arr, n = 0) => (n === -1 ? arr.slice(n) : arr.slice(n, n + 1))[0];
nthElement(['a', 'b', 'c'], 1); // 'b' nthElement(['a', 'b', 'b'], -3); // 'a'
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