ee.Join.saveFirst

Returns a join that pairs each element from the first collection with a matching element from the second collection. The first match is added to the result as an additional property.

Usage	Returns
ee.Join.saveFirst(matchKey, ordering, ascending, measureKey, outer)	Join

Argument	Type	Details
matchKey	String	The property name used to save the match.
ordering	String, default: null	The property on which to sort the matches before selecting the first.
ascending	Boolean, default: true	Whether the ordering is ascending.
measureKey	String, default: null	An optional property name used to save the measure of the join condition on the match.
outer	Boolean, default: false	If true, primary rows without matches will be included in the result.