Function count

count<E>(
array?: null | E[] | readonly E[],
predicate?: (value: E, index: number) => boolean,
): number
Returns the count of elements in the given array which match the given filter
Type Parameters
- E
Parameters
- Optionalarray: null | E[] | readonly E[]
  the array to inspect
- Optionalpredicate: (value: E, index: number) => boolean
  the function to filter the given array
Returns number
the count of elements in the given array which match the given filter
Author
David Hsing
Example
```
count(['foo', 'bar', 'foobar'], value => value.includes('foo'));    // 2
```