Function filter

filter<In>(predicate): Link<In, In>
Filters the input source, only allowing through data for which predicate returns true

drop, on the other hand excludes values for which predicate is true
Type Parameters
- In
Parameters
- predicate: ((v: In) => boolean)
  - - (v): boolean
    - Parameters
      v: In
      Returns boolean
Returns Link<In, In>