docs: update programmability.md examples

+ add Programmability section to README and

Author: nkaradzhov

README.md

@@ -250,6 +250,10 @@ await Promise.all([
 ]);
 ```
 
+### Programmability
+
+See the [Programmability overview](./docs/programmability.md).
+
 ### Clustering
 
 Check out the [Clustering Guide](./docs/clustering.md) when using Node Redis to connect to a Redis Cluster.

docs/programmability.md

@@ -33,8 +33,9 @@ const client = createClient({
       add: {
         NUMBER_OF_KEYS: 1,
         FIRST_KEY_INDEX: 1,
-        transformArguments(key: string, toAdd: number): Array<string> {
-          return [key, toAdd.toString()];
+        parseCommand(parser: CommandParser, key: RedisArgument, toAdd: RedisArgument) {
+          parser.pushKey(key);
+          parser.push(toAdd);
         },
         transformReply: undefined as unknown as () => NumberReply
       }
@@ -61,8 +62,9 @@ const client = createClient({
       SCRIPT: 'return redis.call("GET", KEYS[1]) + ARGV[1];',
       NUMBER_OF_KEYS: 1,
       FIRST_KEY_INDEX: 1,
-      transformArguments(key: string, toAdd: number): Array<string> {
-        return [key, toAdd.toString()];
+      parseCommand(parser: CommandParser, key: RedisArgument, toAdd: RedisArgument) {
+        parser.pushKey(key);
+        parser.push(toAdd);
       },
       transformReply: undefined as unknown as () => NumberReply
     })