sideEffect

Perform some operation on the traverser and pass the result to the next step.

Synopsis

sideEffect(traversal)

Table 1. Legend
Syntax conventions	Description
Lowercase and uppercase	Literal keyword. Includes `()`.
`Italics`	Variable value. Replace with a user-defined value.
`[]`	Optional. Square brackets ( `[]` ) surround optional command arguments. Do not type the square brackets.
`{}`	Group. Braces ( `{}` ) identify a group to choose from. Do not type the braces.
`\|`	Or. A vertical bar ( `\|` ) separates alternative elements. Type any one of the elements. Do not type the vertical bar.
`...`	Repeatable. An ellipsis ( `...` ) indicates that you can repeat the syntax element as often as required.

Description

The sideEffect() step is a general filter step. This step performs some operation on the traverser and passes the result to the next step.

Examples

For each person, find the number of people that person knows, and the number of people known by the person and return the results for both counts:

g.V().hasLabel('person').
    sideEffect(outE('knows').count().store('knows')).
    sideEffect(inE('knows').count().store('known by')).
    cap('knows','known by')