8 lines
246 B
Markdown
8 lines
246 B
Markdown
### Count occurrences of a value in array
|
|
|
|
Use `reduce()` to increment a counter each time you encounter the specific value inside the array.
|
|
|
|
```js
|
|
const countOccurrences = (arr, value) => arr.reduce((a, v) => v===value ? a + 1 : a + 0, 0);
|
|
```
|