fun <T, R> MongoIterable<T>.evaluate(expression: Sequence<T>.() -> R): R (source)
Evaluates the current MongoIterable given the expression of Sequences.
The mongo cursor is closed before returning the result.
Sample:
col.find().evaluate {
//this is a sequence evaluation
//If the first row has a name like "Fred", only one row is loaded in memory!
filter { it.name != "Joe" }.first()
}