Function count`Const`

count<T>(pred?: IndexedPredicate<T>): (src: Iterable) => number
Counts the elements of the source iterable that satisfy the optional predicate.

Curried version of _count.
Type Parameters
- T
  Element type produced by the source iterable.
Parameters
- pred: IndexedPredicate<T> = ...
  Predicate receiving each element and its index; truthy results increment the count.
Returns (src: Iterable) => number
Number of elements accepted by pred, or the total element count when omitted.
Throws
Error Rethrows any error thrown by pred.
Example
```
const evens = _count([1, 2, 3, 4], (value) => value % 2 === 0);
console.log(evens); // 2
```
or using the curried version:
```
const evens = pipeInto([1, 2, 3, 4], count((value) => value % 2 === 0));
console.log(evens); // 2
```