doc: update large file example to show stream mapping

boudra · Apr 28, 2020 · fc2aa00 · fc2aa00
1 parent fb96b42
commit fc2aa00
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/README.md b/README.md
@@ -64,8 +64,10 @@ Query a large file without holding the whole file in memory:
 "large_file.json"
 |> File.stream!()
 |> Jaxon.Stream.from_enumerable()
-|> Jaxon.Stream.query([:root, "users", :all, "id"])
-|> Enum.to_list()
+|> Jaxon.Stream.query([:root, "users", :all, "metadata"])
+|> Stream.map(&(&1["username"],",",&1["email"],"\n"))
+|> Stream.into(File.stream!("large_file.csv"))
+|> Stream.run()
 ```
 
 ## How does Jaxon work?