Polling for row updates

polling-for-row-updates.js

function getRowUpdates(row) {
  var scrolls = Rx.Observable.fromEvent(document, 'scroll');
  var rowVisibilities = 
    scrolls.throttle(50)
      .map(function(scrollEvent) {
        return row.isVisible(scrollEvent.offset);
      })
      .distinctUntilChanged();
      
  var rowShows = rowrowVisibilities.filter(function(v) {
    return v;
  });
  var rowHides = rowrowVisibilities.filter(function(v) {
    return !v;
  });
  
  return rowShows
    .flatMap(Rx.Observable.interval(10))
    .flatMap(function() {
      return row.getRowData().takeUntil(rowHides);
    })
    .toArray();
}

I been looking for this example, thanks for posting, but Can you explain how this works. I mean, how I can fetch api data or huge list of data and put it on scroll...?

I'm also bid confused on how it will take rowHides and rowShow? is there event for that?