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Maps an algorithm over a collection.

Returns the mapped collection.

UsageReturns, dropNulls)Collection
this: collectionCollectionThe Collection instance.
algorithmFunctionThe operation to map over the images or features of the collection. A JavaScript function that receives an image or features and returns one. The function is called only once and the result is captured as a description, so it cannot perform imperative operations or rely on external state.
dropNullsBoolean, optionalIf true, the mapped algorithm is allowed to return nulls, and the elements for which it returns nulls will be dropped.