all but map format

Author: JPryce-Aklundh

modules/ROOT/pages/expressions/map-expressions.adoc

@@ -4,12 +4,15 @@
 
 Map expressions allow you to manipulate and query xref:values-and-types/maps.adoc[`MAP`] values in Cypher.
 
+[NOTE]
+The xref:functions/list.adoc#functions-keys[`keys()`] function can be used to return a `LIST` of all the keys in a `MAP`.
+
 [[example-graph]]
 == Example graph
 
 The following graph is used for the examples below:
 
-image::values_and_types_maps_graph.svg[width="600",role="middle"]
+image::values_and_types_maps_graph.svg[width="700",role="middle"]
 
 To recreate the graph, run the following query against an empty Neo4j database:
 
@@ -328,23 +331,22 @@ RETURN map{a: map.a, valueSum: map.a + map.b + map.c} AS projectedMap
 1+d|Rows: 1
 |===
 
-The below query finds the `Keanu Reeves` node and the movies he has acted in. 
-It is an example of a map projection with a literal entry, which in turn also uses map projection inside the aggregating xref:functions/aggregating.adoc#functions-collect[collect()] function.
+This query uses a map projection with a literal entry, where the `size(movies)` expression calculates the total number of movies `Keanu Reeves` has acted in. 
 
 .Map projection with a literal entry
 [source, cypher, indent=0]
 ----
 MATCH (keanu:Person {name: 'Keanu Reeves'})-[:ACTED_IN]->(movie:Movie)
-WITH keanu, collect(movie{.title, .released}) AS movies
-RETURN keanu{.name, movies: movies} AS keanuMovies
+WITH keanu, collect(movie) AS movies
+RETURN keanu {.name, totalMovies: size(movies)} AS keanuDetails
 ----
 
 .Result
 [role="queryresult",options="header,footer",cols="1*<m"]
 |===
-| keanuMovies
+| keanuDetails
 
-|  {name: "Keanu Reeves", movies: [{title: "The Matrix Revolutions", released: 2003}, {title: "The Matrix Reloaded", released: 2003}, {title: "The Matrix", released: 1999}, {title: "The Devils Advocate", released: 1997}, {title: "The Matrix Resurrections", released: 2021}]}
+| {name: "Keanu Reeves", totalMovies: 5}
 
 1+d|Rows: 1
 |===
@@ -381,17 +383,17 @@ It uses the xref::functions/aggregating.adoc#functions-count[count()] function t
 [source, cypher]
 ----
 MATCH (actor:Person)-[:ACTED_IN]->(movie:Movie)
-WITH actor, count(movie) AS numberOfMovies
-RETURN actor{numberOfMovies, .name} AS nameAndMovies
+WITH actor, count(movie) AS totalMovies
+RETURN actor{totalMovies, .name} AS nameAndMovies
 ----
 
 .Result
 [role="queryresult",options="header,footer",cols="1*<m"]
 |===
 | nameAndMovies
 
-| {name: "Keanu Reeves", numberOfMovies: 5}
-| {name: "Carrie-Anne Moss", numberOfMovies: 4}
+| {name: "Keanu Reeves", totalMovies: 5}
+| {name: "Carrie-Anne Moss", totalMovies: 4}
 
 1+d|Rows: 2
 |===