object Accumulator extends Accumulator
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- Definition Classes
- AnyRef → Any
- def addToSet[T](fieldName: String, expression: T): Accumulator
Gets a field name for a $group operation representing all unique values that results from applying the given expression to each document in a group of documents that share the same group by key.
Gets a field name for a $group operation representing all unique values that results from applying the given expression to each document in a group of documents that share the same group by key.
- fieldName
the field name
- expression
the expression https://docs.mongodb.com/manual/meta/aggregation-quick-reference/#std-label-aggregation-expressions
- returns
the accumulator https://docs.mongodb.com/manual/reference/operator/aggregation/addToSet/
- Definition Classes
- Accumulator
- final def asInstanceOf[T0]: T0
- Definition Classes
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- def asJava[K, V](m: Map[K, V]): ConcurrentMap[K, V]
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- def asJava[K, V](m: Map[K, V]): Map[K, V]
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- def asJava[K, V](m: Map[K, V]): Map[K, V]
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- def asJava[A](s: Set[A]): Set[A]
- Definition Classes
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- def asJava[A](s: Set[A]): Set[A]
- Definition Classes
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- def asJava[A](s: Seq[A]): List[A]
- Definition Classes
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- def asJava[A](s: Seq[A]): List[A]
- Definition Classes
- AsJavaConverters
- def asJava[A](b: Buffer[A]): List[A]
- Definition Classes
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- def asJava[A](i: Iterable[A]): Iterable[A]
- Definition Classes
- AsJavaConverters
- def asJava[A](i: Iterator[A]): Iterator[A]
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- def asJavaCollection[A](i: Iterable[A]): Collection[A]
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- def asJavaDictionary[K, V](m: Map[K, V]): Dictionary[K, V]
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- AsJavaConverters
- def asJavaEnumeration[A](i: Iterator[A]): Enumeration[A]
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- AsJavaConverters
- def avg[T](fieldName: String, expression: T): Accumulator
Gets a field name for a $group operation representing the average of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the average of the values of the given expression when applied to all members of the group.
- fieldName
the field name
- expression
the expression https://docs.mongodb.com/manual/meta/aggregation-quick-reference/#std-label-aggregation-expressions
- returns
the accumulator https://docs.mongodb.com/manual/reference/operator/aggregation/avg/
- Definition Classes
- Accumulator
- def clone(): AnyRef
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- protected[lang]
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- @throws(classOf[java.lang.CloneNotSupportedException]) @IntrinsicCandidate() @native()
- def combinedWith(anotherAccumulator: Accumulator): Accumulator
Merges 2 field accumulators together.
Merges 2 field accumulators together.
- anotherAccumulator
the accumulator to be merged with
- returns
the accumulator
- Definition Classes
- Accumulator
- final def eq(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
- def equals(other: Any): Boolean
- Definition Classes
- Accumulator → AnyRef → Any
- def first[T](fieldName: String, expression: T): Accumulator
Gets a field name for a $group operation representing the value of the given expression when applied to the first member of the group.
Gets a field name for a $group operation representing the value of the given expression when applied to the first member of the group.
- fieldName
the field name
- expression
the expression https://docs.mongodb.com/manual/meta/aggregation-quick-reference/#std-label-aggregation-expressions
- returns
the accumulator https://docs.mongodb.com/manual/reference/operator/aggregation/first/
- Definition Classes
- Accumulator
- final def getClass(): Class[_ <: AnyRef]
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- AnyRef → Any
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- @IntrinsicCandidate() @native()
- def hashCode(): Int
- Definition Classes
- Accumulator → AnyRef → Any
- final def isInstanceOf[T0]: Boolean
- Definition Classes
- Any
- def last[T](fieldName: String, expression: T): Accumulator
Gets a field name for a $group operation representing the value of the given expression when applied to the last member of the group.
Gets a field name for a $group operation representing the value of the given expression when applied to the last member of the group.
- fieldName
the field name
- expression
the expression https://docs.mongodb.com/manual/meta/aggregation-quick-reference/#std-label-aggregation-expressions
- returns
the accumulator https://docs.mongodb.com/manual/reference/operator/aggregation/last/
- Definition Classes
- Accumulator
- def max[T](fieldName: String, expression: T): Accumulator
Gets a field name for a $group operation representing the maximum of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the maximum of the values of the given expression when applied to all members of the group.
- fieldName
the field name
- expression
the expression https://docs.mongodb.com/manual/meta/aggregation-quick-reference/#std-label-aggregation-expressions
- returns
the accumulator https://docs.mongodb.com/manual/reference/operator/aggregation/max/
- Definition Classes
- Accumulator
- def min[T](fieldName: String, expression: T): Accumulator
Gets a field name for a $group operation representing the minimum of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the minimum of the values of the given expression when applied to all members of the group.
- fieldName
the field name
- expression
the expression https://docs.mongodb.com/manual/meta/aggregation-quick-reference/#std-label-aggregation-expressions
- returns
the accumulator https://docs.mongodb.com/manual/reference/operator/aggregation/min/
- Definition Classes
- Accumulator
- final def ne(arg0: AnyRef): Boolean
- Definition Classes
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- final def notify(): Unit
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- @IntrinsicCandidate() @native()
- final def notifyAll(): Unit
- Definition Classes
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- Annotations
- @IntrinsicCandidate() @native()
- def push[T](fieldName: String, expression: T): Accumulator
Gets a field name for a $group operation representing an array of all values that results from applying an expression to each document in a group of documents that share the same group by key.
Gets a field name for a $group operation representing an array of all values that results from applying an expression to each document in a group of documents that share the same group by key.
- fieldName
the field name
- expression
the expression https://docs.mongodb.com/manual/meta/aggregation-quick-reference/#std-label-aggregation-expressions
- returns
the accumulator https://docs.mongodb.com/manual/reference/operator/aggregation/push/
- Definition Classes
- Accumulator
- def stdDevPop[T](fieldName: String, expression: T): Accumulator
Gets a field name for a $group operation representing the sample standard deviation of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the sample standard deviation of the values of the given expression when applied to all members of the group.
Use if the values encompass the entire population of data you want to represent and do not wish to generalize about a larger population.
- fieldName
the field name
- expression
the expression https://docs.mongodb.com/manual/meta/aggregation-quick-reference/#std-label-aggregation-expressions
- returns
the accumulator https://docs.mongodb.com/manual/reference/operator/aggregation/stdDevPop/
- Definition Classes
- Accumulator
- Since
3.2
- def stdDevSamp[T](fieldName: String, expression: T): Accumulator
Gets a field name for a $group operation representing the sample standard deviation of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the sample standard deviation of the values of the given expression when applied to all members of the group.
Use if the values encompass a sample of a population of data from which to generalize about the population.
- fieldName
the field name
- expression
the expression https://docs.mongodb.com/manual/meta/aggregation-quick-reference/#std-label-aggregation-expressions
- returns
the accumulator https://docs.mongodb.com/manual/reference/operator/aggregation/stdDevSamp/
- Definition Classes
- Accumulator
- def sum[T](fieldName: String, expression: T): Accumulator
Gets a field name for a $group operation representing the sum of the values of the given expression when applied to all members of the group.
Gets a field name for a $group operation representing the sum of the values of the given expression when applied to all members of the group.
- fieldName
the field name
- expression
the expression https://docs.mongodb.com/manual/meta/aggregation-quick-reference/#std-label-aggregation-expressions
- returns
the accumulator https://docs.mongodb.com/manual/reference/operator/aggregation/sum/
- Definition Classes
- Accumulator
- final def synchronized[T0](arg0: => T0): T0
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- def toString(): String
- Definition Classes
- Accumulator → AnyRef → Any
- final def wait(arg0: Long, arg1: Int): Unit
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- @throws(classOf[java.lang.InterruptedException])
- final def wait(arg0: Long): Unit
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- final def wait(): Unit
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- def finalize(): Unit
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- @throws(classOf[java.lang.Throwable]) @Deprecated
- Deprecated
(Since version 9)