ee.Reducer.combine

Creates a Reducer that runs two reducers in parallel. The combined reducer's outputs will be those of reducer1 followed by those of reducer2, where the output names of reducer2 are prefixed with the given string.

If sharedInputs is true, the reducers must have the same number of inputs, and the combined reducer's will match them; if it is false, the inputs of the combined reducer will be those of reducer1 followed by those of reducer2.

Usage	Returns
Reducer.combine(reducer2, outputPrefix, sharedInputs)	Reducer

Argument	Type	Details
this: reducer1	Reducer	The first reducer.
reducer2	Reducer	The second reducer.
outputPrefix	String, default: ""	Prefix for reducer2's output names.
sharedInputs	Boolean, default: false	Whether the reducers share inputs.