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30secondsofcode
2018-01-11 11:47:13 +00:00
parent bcc05a9a6e
commit b2105b096e
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snippets/maxBy.md
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@ -5,11 +5,10 @@ Returns the maximum value of an array, after mapping each element to a value usi
Use `Array.map()` to map each element to the value returned by `fn`, `Math.max()` to get the maximum value.
```js
const maxBy = (arr, fn) =>
Math.max(...arr.map(typeof fn === 'function' ? fn : val => val[fn]));
const maxBy = (arr, fn) => Math.max(...arr.map(typeof fn === 'function' ? fn : val => val[fn]));
```
```js
maxBy([{ n: 4 }, { n: 2 }, { n: 8 }, { n: 6 }], o => o.n); // 8
maxBy([{ n: 4 }, { n: 2 }, { n: 8 }, { n: 6 }],'n'); // 8
maxBy([{ n: 4 }, { n: 2 }, { n: 8 }, { n: 6 }], 'n'); // 8
```