original_string: public function zip(array $observables, callable $selector = null)
      {
          return $this->lift(function () use ($observables, $selector) {
              return new ZipOperator($observables, $selector);
          });
      }
code: public function zip(array $observables, callable $selector = null)
      {
          return $this->lift(function () use ($observables, $selector) {
              return new ZipOperator($observables, $selector);
          });
      }
code_tokens: public function zip ( array $ observables , callable $ selector = null ) { return $ this -> lift ( function ( ) use ( $ observables , $ selector ) { return new ZipOperator ( $ observables , $ selector ) ; } ) ; }
docstring: Merges the specified observable sequences into one observable sequence by using the selector
  function whenever all of the observable sequences have produced an element at a corresponding index. If the
  result selector function is omitted, a list with the elements of the observable sequences at corresponding
  indexes will be yielded.
  
  @param array $observables
  @param callable $selector
  @return \Rx\Observable\AnonymousObservable
docstring_tokens: Merges the specified observable sequences into one observable sequence by using the selector function whenever all of the observable sequences have produced an element at a corresponding index . If the result selector function is omitted a list with the elements of the observable sequences at corresponding indexes will be yielded .