alt Hacker NewsNot sure what lambda helpers are. But you can write Google AppScript which is just JS and do some pretty cool stuff, including define custom functions and fully integrate with Google APIs. I've used to to send emails, or create calendar events for example.
Byrow, bycol, map, reduce, scan, makearray, and most recently groupby and pivotby.
Basically functions that take a lambda argument and apply it over some range.