Function count

count(iterable): number
Returns the number of valid number values (i.e., not null, NaN, or undefined) in the specified iterable; accepts an accessor.
Parameters
- iterable: Iterable<unknown>
  Input array.
Returns number
count<TObject>(iterable, accessor): number
Returns the number of valid number values (i.e., not null, NaN, or undefined) in the specified iterable; accepts an accessor.
Type Parameters
- TObject
Parameters
- iterable: Iterable<TObject>
  Input array.
- accessor: ((a, b) => number)
  Accessor method.
  - - (a, b): number
    - Parameters
      a: TObject
      b: TObject
      Returns number
Returns number