20 lines
715 B
Markdown
20 lines
715 B
Markdown
### longestItem
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Takes any number of iterable objects or objects with a `length` property and returns the longest one.
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If multiple objects have the same length, the first one will be returned.
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Returns `undefined` if no arguments are provided.
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Use `Array.prototype.reduce()`, comparing the `length` of objects to find the longest one.
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```js
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const longestItem = (...vals) => vals.reduce((a, x) => (x.length > a.length ? x : a));
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```
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```js
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longestItem('this', 'is', 'a', 'testcase'); // 'testcase'
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longestItem(...['a', 'ab', 'abc']); // 'abc'
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longestItem(...['a', 'ab', 'abc'], 'abcd'); // 'abcd'
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longestItem([1, 2, 3], [1, 2], [1, 2, 3, 4, 5]); // [1, 2, 3, 4, 5]
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longestItem([1, 2, 3], 'foobar'); // 'foobar'
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```
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