Improved example

README.md

@@ -29,13 +29,19 @@ db.exec(sql"CREATE TABLE items (id bigserial PRIMARY KEY, embedding vector(3))")
 Insert vectors
 
 ```nim
-db.exec(sql"INSERT INTO items (embedding) VALUES (?), (?), (?)", "[1,1,1]", "[2,2,2]", "[1,1,2]")
+import std/json
+
+let embedding1 = %* @[1, 1, 1];
+let embedding2 = %* @[1, 1, 2];
+let embedding3 = %* @[2, 2, 2];
+db.exec(sql"INSERT INTO items (embedding) VALUES (?), (?), (?)", embedding1, embedding2, embedding3)
 ```
 
 Get the nearest neighbors
 
 ```nim
-let rows = db.getAllRows(sql"SELECT * FROM items ORDER BY embedding <-> ? LIMIT 5", "[1,1,1]")
+let embedding = %* @[1, 1, 1];
+let rows = db.getAllRows(sql"SELECT * FROM items ORDER BY embedding <-> ? LIMIT 5", embedding)
 for row in rows:
   echo row
 ```

example.nim

@@ -1,4 +1,5 @@
 import db_connector/db_postgres
+import std/json
 
 let db = db_postgres.open("localhost", "", "", "pgvector_nim_test")
 
@@ -7,11 +8,15 @@ db.exec(sql"DROP TABLE IF EXISTS items")
 
 db.exec(sql"CREATE TABLE items (id bigserial PRIMARY KEY, embedding vector(3))")
 
-db.exec(sql"INSERT INTO items (embedding) VALUES (?), (?), (?)", "[1,1,1]", "[2,2,2]", "[1,1,2]")
+let embedding1 = %* @[1, 1, 1];
+let embedding2 = %* @[1, 1, 2];
+let embedding3 = %* @[2, 2, 2];
+db.exec(sql"INSERT INTO items (embedding) VALUES (?), (?), (?)", embedding1, embedding2, embedding3)
 
-let rows = db.getAllRows(sql"SELECT * FROM items ORDER BY embedding <-> ? LIMIT 5", "[1,1,1]")
+let embedding = %* @[1, 1, 1];
+let rows = db.getAllRows(sql"SELECT * FROM items ORDER BY embedding <-> ? LIMIT 5", embedding)
 for row in rows:
-  echo row
+  echo row[0], ": ", parseJson(row[1])
 
 db.exec(sql"CREATE INDEX ON items USING hnsw (embedding vector_l2_ops)")