21 lines
496 B
Markdown
21 lines
496 B
Markdown
---
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title: nthElement
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tags: array,beginner
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---
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Returns the nth element of an array.
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- Use `Array.prototype.slice()` to get an array containing the nth element at the first place.
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- If the index is out of bounds, return `undefined`.
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- Omit the second argument, `n`, to get the first element of the array.
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```js
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const nthElement = (arr, n = 0) =>
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(n === -1 ? arr.slice(n) : arr.slice(n, n + 1))[0];
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```
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```js
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nthElement(['a', 'b', 'c'], 1); // 'b'
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nthElement(['a', 'b', 'b'], -3); // 'a'
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```
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