chore: update pubsub example by disabled emit self (#823)

Author: vasco-santos

examples/pubsub/1.js

@@ -43,6 +43,7 @@ const createNode = async () => {
   })
   await node1.pubsub.subscribe(topic)
 
+  // Will not receive own published messages by default
   node2.pubsub.on(topic, (msg) => {
     console.log(`node2 received: ${uint8ArrayToString(msg.data)}`)
   })

examples/pubsub/README.md

@@ -44,14 +44,14 @@ const node2 = nodes[1]
 
 // Add node's 2 data to the PeerStore
 node1.peerStore.addressBook.set(node2.peerId, node2.multiaddrs)
-
 await node1.dial(node2.peerId)
 
 node1.pubsub.on(topic, (msg) => {
   console.log(`node1 received: ${uint8ArrayToString(msg.data)}`)
 })
 await node1.pubsub.subscribe(topic)
 
+// Will not receive own published messages by default
 node2.pubsub.on(topic, (msg) => {
   console.log(`node2 received: ${uint8ArrayToString(msg.data)}`)
 })
@@ -68,25 +68,34 @@ The output of the program should look like:
 ```
 > node 1.js
 connected to QmWpvkKm6qHLhoxpWrTswY6UMNWDyn8hN265Qp9ZYvgS82
-node2 received: Bird bird bird, bird is the word!
 node1 received: Bird bird bird, bird is the word!
-node2 received: Bird bird bird, bird is the word!
 node1 received: Bird bird bird, bird is the word!
 ```
 
-You can change the pubsub `emitSelf` option if you don't want the publishing node to receive its own messages.
+You can change the pubsub `emitSelf` option if you want the publishing node to receive its own messages.
 
 ```JavaScript
 const defaults = {
   config: {
     pubsub: {
       enabled: true,
-      emitSelf: false
+      emitSelf: true
     }
   }
 }
 ```
 
+The output of the program should look like:
+
+```
+> node 1.js
+connected to QmWpvkKm6qHLhoxpWrTswY6UMNWDyn8hN265Qp9ZYvgS82
+node1 received: Bird bird bird, bird is the word!
+node2 received: Bird bird bird, bird is the word!
+node1 received: Bird bird bird, bird is the word!
+node2 received: Bird bird bird, bird is the word!
+```
+
 ## 2. Future work
 
 libp2p/IPFS PubSub is enabling a whole set of Distributed Real Time applications using CRDT (Conflict-Free Replicated Data Types). It is still going through heavy research (and hacking) and we invite you to join the conversation at [research-CRDT](https://github.com/ipfs/research-CRDT). Here is a list of some of the exciting examples:

examples/pubsub/message-filtering/1.js

@@ -44,6 +44,7 @@ const createNode = async () => {
 
   //subscribe
   node1.pubsub.on(topic, (msg) => {
+    // Will not receive own published messages by default
     console.log(`node1 received: ${uint8ArrayToString(msg.data)}`)
   })
   await node1.pubsub.subscribe(topic)

examples/pubsub/message-filtering/README.md

@@ -97,15 +97,12 @@ Result
 ```
 > node 1.js
 ############## fruit banana ##############
-node1 received: banana
 node2 received: banana
 node3 received: banana
 ############## fruit apple ##############
-node1 received: apple
 node2 received: apple
 node3 received: apple
 ############## fruit car ##############
-node1 received: car
 ############## fruit orange ##############
 node1 received: orange
 node2 received: orange