Function count

count<T>(iterable, filterPredicate?): number
Category
Count the number of elements in an iterable You may optionally provide a predicate function to filter which elements are counted.

Time complexity: O(n)

Space complexity: O(1)
Type Parameters
- T
Parameters
- iterable: Iterable<T>
  The iterable to count the elements of
- Optional filterPredicate: ((element) => boolean)
  - - (element): boolean
    - Parameters
      element: T
      Returns boolean
Returns number
The number of elements in iterable. If predicate was provided, the number of elements in iterable that satisfy predicate.
Example
```
count([1, 2, 3]); // 3
```
Example
```
count([1, 2, 3], number => number % 2 === 1); // 2
```
See
frequencyTable to count the occurrences of all elements in an iterable

Iterable
- Defined in src/iterable/count.ts:28