76 lines
2.5 KiB
Markdown
76 lines
2.5 KiB
Markdown
---
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id: 5e6dd14192286d95fc43046e
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title: Longest string challenge
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challengeType: 5
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forumTopicId: 385275
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---
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## Description
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<section id='description'>
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In this challenge, you have to find the strings that are the longest among the given strings.
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</section>
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## Instructions
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<section id='instructions'>
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Write a function that takes an array of strings and returns the strings that have a length equal to the longest length.
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</section>
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## Tests
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<section id='tests'>
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``` yml
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tests:
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- text: <code>longestString</code> should be a function.
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testString: assert(typeof longestString == 'function');
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- text: <code>longestString(["a", "bb", "ccc", "ee", "f", "ggg"])</code> should return a array.
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testString: assert(Array.isArray(longestString(["a", "bb", "ccc", "ee", "f", "ggg"])));
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- text: <code>longestString(["a", "bb", "ccc", "ee", "f", "ggg"])</code> should return <code>["ccc", "ggg"]'</code>.
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testString: assert.deepEqual(longestString(["a", "bb", "ccc", "ee", "f", "ggg"]), ["ccc", "ggg"]);
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- text: <code>longestString(["afedg", "bb", "sdccc", "efdee", "f", "geegg"])</code> should return <code>["afedg", "sdccc", "efdee", "geegg"]</code>.
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testString: assert.deepEqual(longestString(["afedg", "bb", "sdccc", "efdee", "f", "geegg"]), ["afedg", "sdccc", "efdee", "geegg"]);
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- text: <code>longestString(["a", "bhghgb", "ccc", "efde", "fssdrr", "ggg"])</code> should return <code>["bhghgb", "fssdrr"]</code>.
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testString: assert.deepEqual(longestString(["a", "bhghgb", "ccc", "efde", "fssdrr", "ggg"]), ["bhghgb", "fssdrr"]);
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- text: <code>longestString(["ahgfhg", "bdsfsb", "ccc", "ee", "f", "ggdsfg"])</code> should return <code>["ahgfhg", "bdsfsb", "ggdsfg"]</code>.
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testString: assert.deepEqual(longestString(["ahgfhg", "bdsfsb", "ccc", "ee", "f", "ggdsfg"]), ["ahgfhg", "bdsfsb", "ggdsfg"]);
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- text: <code>longestString(["a", "bbdsf", "ccc", "edfe", "gzzzgg"])</code> should return <code>["gzzzgg"]</code>.
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testString: assert.deepEqual(longestString(["a", "bbdsf", "ccc", "edfe", "gzzzgg"]), ["gzzzgg"]);
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function longestString(strings) {
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}
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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function longestString(strings) {
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var mx = 0;
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var result = []
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strings.forEach(function (e) {
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if (e.length > mx) {
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mx = e.length
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result = [e]
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} else if (e.length == mx)
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result.push(e)
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})
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return result
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}
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```
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</section>
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