15 lines
291 B
Markdown
15 lines
291 B
Markdown
### countVowels
|
|
|
|
Retuns `number` of vowels in provided string.
|
|
|
|
Use a regular expression to count the number of vowels `(A, E, I, O, U)` in a `string`.
|
|
|
|
```js
|
|
const countVowels = str => (str.match(/[aeiou]/ig) || []).length;
|
|
```
|
|
|
|
```js
|
|
countVowels('foobar') -> 3
|
|
countVowels('gym') -> 0
|
|
```
|