Function count

count<TElement>(
source: Iterable<TElement>,
predicate?: Predicate<TElement>,
): number
Counts the number of elements in the sequence, optionally restricted by a predicate.
Type Parameters
- TElement
  Type of elements within the source iterable.
Parameters
- source: Iterable<TElement>
  The source iterable.
- Optionalpredicate: Predicate<TElement>
  Optional predicate that determines which elements are counted. When omitted, all elements are counted.
Returns number
The number of elements that satisfy the predicate.
Remarks
Prefer calling any(source) to test for existence instead of comparing this result with zero.
Example
```
const numbers = [1, 2, 3, 4, 5];
const totalCount = count(numbers);
console.log(totalCount); // 5

const evenCount = count(numbers, x => x % 2 === 0);
console.log(evenCount); // 2
```
- Defined in src/enumerator/functions/count.ts:21