flatMap
Create a map of traversal objects and stream to the next traversal step.
Synopsis
flatMap(traversal)| 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 flatMap() step is a general flatMap
step. This step creates a map of the traversal objects and streams the map to the
next traversal step.
Examples
Return a map of the recipe properties included in the cookbooks in the graph, but limit the
return to 3
recipes:
g.V().hasLabel('book').flatMap(__.in('includedIn').hasLabel('recipe').limit(3))