iot.jcypher.query.api.collection

Class ReduceBy

java.lang.Object

iot.jcypher.query.api.APIObject

iot.jcypher.query.api.collection.ReduceBy

public class ReduceBy
extends APIObject

Field Summary

Fields inherited from class iot.jcypher.query.api.APIObject

astNode

Method Summary

Methods

Modifier and Type	Method and Description
ReduceInit	by(ValueElement valueExpression) JCYPHER specify an expression to be evaluated against individual elements of a collection in the context of a REDUCE expression.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

by

public ReduceInit by(ValueElement valueExpression)

JCYPHER

specify an expression to be evaluated against individual elements of a collection in the context of a REDUCE expression.
The result of each evaluation is accumulated in a variable

e.g. ...REDUCE()
.fromAll(n).IN_nodes(p)
.to(totalAge)
.by(totalAge.plus(n.numberProperty("age")))
.startWith(0)