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longestItem javascript Code Snippet in 2022

arrayintermediate

Last Updated: 25 September 2022

Takes any number of iterable objects or objects with a length property and returns the longest one.

  • Use Array.prototype.reduce(), comparing the length of objects to find the longest one.
  • If multiple objects have the same length, the first one will be returned.
  • Returns undefined if no arguments are provided.
const longestItem = (...vals) => vals.reduce((a, x) => (x.length > a.length ? x : a));
longestItem('this', 'is', 'a', 'testcase'); // 'testcase' longestItem(...['a', 'ab', 'abc']); // 'abc' longestItem(...['a', 'ab', 'abc'], 'abcd'); // 'abcd' longestItem([1, 2, 3], [1, 2], [1, 2, 3, 4, 5]); // [1, 2, 3, 4, 5] longestItem([1, 2, 3], 'foobar'); // 'foobar'

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