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Apply new format to snippets and template

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Angelos Chalaris
2020-09-15 16:28:04 +03:00
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snippets/countBy.md
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@ -5,8 +5,8 @@ tags: array,object,intermediate
Groups the elements of an array based on the given function and returns the count of elements in each group.
Use `Array.prototype.map()` to map the values of an array to a function or property name.
Use `Array.prototype.reduce()` to create an object, where the keys are produced from the mapped results.
- Use `Array.prototype.map()` to map the values of an array to a function or property name.
- Use `Array.prototype.reduce()` to create an object, where the keys are produced from the mapped results.
```js
const countBy = (arr, fn) =>