Merge pull request #113 from FalkorDB/AviAvni-patch-2

Update functions.md

Author: swilly22

datatypes.md

@@ -136,6 +136,19 @@ $ redis-cli GRAPH.QUERY G "MATCH (n) RETURN n {.name, .age} AS projection"
 2) 1) 1) "{name: Jeff, age: 32}"
 ```
 
+#### Map merging
+
+You can combine two maps, where values in the second map will override corresponding values in the first map.
+For example:
+
+```sh
+$ redis-cli GRAPH.QUERY g "RETURN {a: 1, b: 2} + {a: 2, c: 3}"
+1) 1) "{a: 1, b: 2} + {a: 2, c: 3}"
+2) 1) 1) "{b: 2, a: 2, c: 3}"
+3) 1) "Cached execution: 0"
+   2) "Query internal execution time: 0.467666 milliseconds"
+```
+
 #### Function calls in map values
 
 The values in maps and map projections are flexible, and can generally refer either to constants or computed values: