object Accumulator extends AsJava
Linear Supertypes
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- Definition Classes
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- def addToSet[T](fieldName: String, expression: T): Accumulator
- def apply(fieldName: String, initFunction: String, accumulateFunction: String, mergeFunction: String, initArgs: List[String] = Nil, accumulateArgs: List[String] = Nil, finalizeFunction: Option[String] = None, lang: String = "jr"): Accumulator
Creates an $accumulator pipeline stage
Creates an $accumulator pipeline stage
- fieldName
the field name
- initFunction
a function used to initialize the state
- accumulateFunction
a function used to accumulate documents
- mergeFunction
a function used to merge two internal states, e.g. accumulated on different shards or threads. It returns the resulting state of the accumulator.
- initArgs
init function’s arguments
- accumulateArgs
additional accumulate function’s arguments. The first argument to the function is ‘state’.
- finalizeFunction
a function used to finalize the state and return the result
- lang
a language specifier
- returns
the $accumulator pipeline stage https://docs.mongodb.com/manual/reference/operator/aggregation/accumulator/
- Since
4.1
- 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]
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- def asJava[A](s: Set[A]): Set[A]
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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]
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- def asJava[A](b: Buffer[A]): List[A]
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- def asJava[A](i: Iterable[A]): Iterable[A]
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- 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]
- Definition Classes
- AsJavaConverters
- def avg[T](fieldName: String, expression: T): Accumulator
- def clone(): AnyRef
- Attributes
- protected[lang]
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- Annotations
- @throws(classOf[java.lang.CloneNotSupportedException]) @IntrinsicCandidate() @native()
- final def eq(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
- def equals(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef → Any
- def first[T](fieldName: String, expression: T): Accumulator
- final def getClass(): Class[_ <: AnyRef]
- Definition Classes
- AnyRef → Any
- Annotations
- @IntrinsicCandidate() @native()
- def hashCode(): Int
- Definition Classes
- AnyRef → Any
- Annotations
- @IntrinsicCandidate() @native()
- final def isInstanceOf[T0]: Boolean
- Definition Classes
- Any
- def last[T](fieldName: String, expression: T): Accumulator
- def max[T](fieldName: String, expression: T): Accumulator
- def min[T](fieldName: String, expression: T): Accumulator
- final def ne(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
- final def notify(): Unit
- Definition Classes
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- Annotations
- @IntrinsicCandidate() @native()
- final def notifyAll(): Unit
- Definition Classes
- AnyRef
- Annotations
- @IntrinsicCandidate() @native()
- def push[T](fieldName: String, expression: T): Accumulator
- def stdDevPop[T](fieldName: String, expression: T): Accumulator
- def stdDevSamp[T](fieldName: String, expression: T): Accumulator
- def sum[T](fieldName: String, expression: T): Accumulator
- final def synchronized[T0](arg0: => T0): T0
- Definition Classes
- AnyRef
- def toString(): String
- Definition Classes
- 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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- @throws(classOf[java.lang.InterruptedException]) @native()
- final def wait(): Unit
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- Annotations
- @throws(classOf[java.lang.InterruptedException])
Deprecated Value Members
- def finalize(): Unit
- Attributes
- protected[lang]
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- Annotations
- @throws(classOf[java.lang.Throwable]) @Deprecated
- Deprecated
(Since version 9)