From 3bb85243ad439c9c344328e90fce6145e88685b5 Mon Sep 17 00:00:00 2001
From: atomiks <cc.glows@gmail.com>
Date: Sat, 6 Jan 2018 00:07:26 +1100
Subject: [PATCH 01/19] Add createEventHub

---
 snippets/createEventHub.md | 36 ++++++++++++++++++++++++++++++++++++
 tag_database               |  1 +
 2 files changed, 37 insertions(+)
 create mode 100644 snippets/createEventHub.md

diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md
new file mode 100644
index 000000000..9804e9e4a
--- /dev/null
+++ b/snippets/createEventHub.md
@@ -0,0 +1,36 @@
+### createEventHub
+
+Creates a pubsub event hub with `emit`, `on`, and `off` methods.
+
+For `emit`, resolve the array of handlers based on the `event` argument and then run
+each one by passing in the data as an argument.
+
+For `on`, create an array for the event if it does not yet exist, then push the handler
+into the array.
+
+For `off`, find the index of the handler in the event array and remove it.
+
+```js
+const createEventHub = () => ({
+  hub: {},
+  emit(event, data) {
+    this.hub[event].forEach(handler => handler(data));
+  },
+  on(event, handler) {
+    if (!this.hub[event]) this.hub[event] = [];
+    this.hub[event].push(handler);
+  },
+  off(event, handler) {
+    const i = this.hub[event].findIndex(h => h === handler);
+    if (i) this.hub[event].splice(i, 1);
+  }
+});
+```
+
+```js
+const hub = createEventHub();
+const fn = data => console.log(data);
+hub.on('message', fn); // subscribe a handler to listen for 'message' events
+hub.emit('message', 'hello!'); // console logs 'hello!'
+hub.off('message', fn); // unsubscribe our handler from 'message'
+```
diff --git a/tag_database b/tag_database
index dc0014097..a596effd8 100644
--- a/tag_database
+++ b/tag_database
@@ -20,6 +20,7 @@ compose:function
 copyToClipboard:browser
 countOccurrences:array
 countVowels:string
+createEventHub:utility
 currentURL:browser
 curry:function
 deepFlatten:array

From 3ac45b6be39075efd0154300b231313892250dcd Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Sat, 6 Jan 2018 00:09:51 +1100
Subject: [PATCH 02/19] Update createEventHub.md

---
 snippets/createEventHub.md | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md
index 9804e9e4a..c1cd73097 100644
--- a/snippets/createEventHub.md
+++ b/snippets/createEventHub.md
@@ -3,12 +3,12 @@
 Creates a pubsub event hub with `emit`, `on`, and `off` methods.
 
 For `emit`, resolve the array of handlers based on the `event` argument and then run
-each one by passing in the data as an argument.
+each one with `Array.forEach()` by passing in the data as an argument.
 
-For `on`, create an array for the event if it does not yet exist, then push the handler
-into the array.
+For `on`, create an array for the event if it does not yet exist, then use `Array.push()` to add the handler
+to the array.
 
-For `off`, find the index of the handler in the event array and remove it.
+For `off`, use `Array.findIndex()` to find the index of the handler in the event array and remove it.
 
 ```js
 const createEventHub = () => ({

From c2140cb3aad8c5cbbb8117a7f11f87cd79be77b6 Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Sat, 6 Jan 2018 00:18:41 +1100
Subject: [PATCH 03/19] Update createEventHub.md

---
 snippets/createEventHub.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md
index c1cd73097..86ded9037 100644
--- a/snippets/createEventHub.md
+++ b/snippets/createEventHub.md
@@ -8,7 +8,7 @@ each one with `Array.forEach()` by passing in the data as an argument.
 For `on`, create an array for the event if it does not yet exist, then use `Array.push()` to add the handler
 to the array.
 
-For `off`, use `Array.findIndex()` to find the index of the handler in the event array and remove it.
+For `off`, use `Array.findIndex()` to find the index of the handler in the event array and remove it using `Array.splice()`.
 
 ```js
 const createEventHub = () => ({

From 9f7fc75c4fab051fb31732c119d8ff3c4d2579f5 Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Sat, 6 Jan 2018 00:26:30 +1100
Subject: [PATCH 04/19] fix index typo

---
 snippets/createEventHub.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md
index 86ded9037..e1117b7db 100644
--- a/snippets/createEventHub.md
+++ b/snippets/createEventHub.md
@@ -22,7 +22,7 @@ const createEventHub = () => ({
   },
   off(event, handler) {
     const i = this.hub[event].findIndex(h => h === handler);
-    if (i) this.hub[event].splice(i, 1);
+    if (i > -1) this.hub[event].splice(i, 1);
   }
 });
 ```

From 4b6b5743c5b86a83f79bf21d917f699907e306d4 Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Sat, 6 Jan 2018 00:30:47 +1100
Subject: [PATCH 05/19] silence error for `emit`

---
 snippets/createEventHub.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md
index e1117b7db..65690fa92 100644
--- a/snippets/createEventHub.md
+++ b/snippets/createEventHub.md
@@ -14,7 +14,7 @@ For `off`, use `Array.findIndex()` to find the index of the handler in the event
 const createEventHub = () => ({
   hub: {},
   emit(event, data) {
-    this.hub[event].forEach(handler => handler(data));
+    (this.hub[event] || []).forEach(handler => handler(data));
   },
   on(event, handler) {
     if (!this.hub[event]) this.hub[event] = [];

From 217bf29360172c4af56c409291c22ce38fa7377a Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Sat, 6 Jan 2018 01:26:07 +1100
Subject: [PATCH 06/19] Update createEventHub.md

---
 snippets/createEventHub.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md
index 65690fa92..66c718bc7 100644
--- a/snippets/createEventHub.md
+++ b/snippets/createEventHub.md
@@ -21,7 +21,7 @@ const createEventHub = () => ({
     this.hub[event].push(handler);
   },
   off(event, handler) {
-    const i = this.hub[event].findIndex(h => h === handler);
+    const i = (this.hub[event] || []).findIndex(h => h === handler);
     if (i > -1) this.hub[event].splice(i, 1);
   }
 });

From 3de2c5138d633520dfc827844e7124939f93113d Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Sat, 6 Jan 2018 02:56:15 +1100
Subject: [PATCH 07/19] Update tag_database

---
 tag_database | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tag_database b/tag_database
index a596effd8..212c1a883 100644
--- a/tag_database
+++ b/tag_database
@@ -20,7 +20,7 @@ compose:function
 copyToClipboard:browser
 countOccurrences:array
 countVowels:string
-createEventHub:utility
+createEventHub:browser,utility,advanced
 currentURL:browser
 curry:function
 deepFlatten:array

From c2fcbe6d208cdefd9a7f68b17416d0bb59edfb31 Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Sat, 6 Jan 2018 07:42:11 +1100
Subject: [PATCH 08/19] Update createEventHub.md

---
 snippets/createEventHub.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md
index 66c718bc7..c0530a7bd 100644
--- a/snippets/createEventHub.md
+++ b/snippets/createEventHub.md
@@ -1,6 +1,6 @@
 ### createEventHub
 
-Creates a pubsub event hub with `emit`, `on`, and `off` methods.
+Creates a pub/sub ([publish–subscribe](https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern)) event hub with `emit`, `on`, and `off` methods.
 
 For `emit`, resolve the array of handlers based on the `event` argument and then run
 each one with `Array.forEach()` by passing in the data as an argument.

From 578a655062858c3bddcb172dc8fb48221d9f6dc9 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 5 Jan 2018 23:57:11 +0200
Subject: [PATCH 09/19] Update tag_database

---
 tag_database | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tag_database b/tag_database
index 58ec130d5..4b6eaec24 100644
--- a/tag_database
+++ b/tag_database
@@ -21,7 +21,7 @@ countOccurrences:array
 countVowels:string
 currentURL:browser,url
 curry:function,recursion
-createEventHub:browser,utility,advanced
+createEventHub:browser,event,advanced
 deepFlatten:array,recursion
 defer:function
 detectDeviceType:browser

From 823236dbf778c882c5d371836630cd9b341faa84 Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Tue, 9 Jan 2018 05:44:23 +1100
Subject: [PATCH 10/19] Use Map instead

---
 snippets/createEventHub.md | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md
index c0530a7bd..decc156b7 100644
--- a/snippets/createEventHub.md
+++ b/snippets/createEventHub.md
@@ -2,6 +2,8 @@
 
 Creates a pub/sub ([publish–subscribe](https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern)) event hub with `emit`, `on`, and `off` methods.
 
+Instantiate a new `Map` object to allow any event type (including objects) to be the key, and also so object prototype property names are not resolved.
+
 For `emit`, resolve the array of handlers based on the `event` argument and then run
 each one with `Array.forEach()` by passing in the data as an argument.
 
@@ -12,25 +14,29 @@ For `off`, use `Array.findIndex()` to find the index of the handler in the event
 
 ```js
 const createEventHub = () => ({
-  hub: {},
+  hub: new Map(),
   emit(event, data) {
-    (this.hub[event] || []).forEach(handler => handler(data));
+    (this.hub.get(event) || []).forEach(handler => handler(data));
   },
   on(event, handler) {
-    if (!this.hub[event]) this.hub[event] = [];
-    this.hub[event].push(handler);
+    if (!this.hub.get(event)) this.hub.set(event, []);
+    this.hub.get(event).push(handler);
   },
   off(event, handler) {
-    const i = (this.hub[event] || []).findIndex(h => h === handler);
-    if (i > -1) this.hub[event].splice(i, 1);
+    const i = (this.hub.get(event) || []).findIndex(h => h === handler);
+    if (i > -1) this.hub.get(event).splice(i, 1);
   }
 });
 ```
 
 ```js
-const hub = createEventHub();
 const fn = data => console.log(data);
+const obj = {};
+
+const hub = createEventHub();
 hub.on('message', fn); // subscribe a handler to listen for 'message' events
+hub.on(obj, fn); // subscribe a handler to listen for the object
 hub.emit('message', 'hello!'); // console logs 'hello!'
-hub.off('message', fn); // unsubscribe our handler from 'message'
+hub.emit(obj, 'hello!'); // console logs 'hello'
+hub.off('message', fn); // unsubscribe our handler from 'message', the obj event will still work
 ```

From f18b4942b94747b74498015810c0850d058a4bd3 Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Tue, 9 Jan 2018 05:46:17 +1100
Subject: [PATCH 11/19] Update createEventHub.md

---
 snippets/createEventHub.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md
index decc156b7..3b0e10c33 100644
--- a/snippets/createEventHub.md
+++ b/snippets/createEventHub.md
@@ -2,7 +2,7 @@
 
 Creates a pub/sub ([publish–subscribe](https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern)) event hub with `emit`, `on`, and `off` methods.
 
-Instantiate a new `Map` object to allow any event type (including objects) to be the key, and also so object prototype property names are not resolved.
+Instantiate a new `Map` object to allow any event type (including objects) to be the key, and also so `Object.prototype` property names are not resolved.
 
 For `emit`, resolve the array of handlers based on the `event` argument and then run
 each one with `Array.forEach()` by passing in the data as an argument.
@@ -37,6 +37,6 @@ const hub = createEventHub();
 hub.on('message', fn); // subscribe a handler to listen for 'message' events
 hub.on(obj, fn); // subscribe a handler to listen for the object
 hub.emit('message', 'hello!'); // console logs 'hello!'
-hub.emit(obj, 'hello!'); // console logs 'hello'
+hub.emit(obj, 'hello!'); // console logs 'hello!'
 hub.off('message', fn); // unsubscribe our handler from 'message', the obj event will still work
 ```

From af23b5d94784dd589d9a7059604c546ca7d98c57 Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Tue, 9 Jan 2018 05:58:58 +1100
Subject: [PATCH 12/19] cache the getting

---
 snippets/createEventHub.md | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md
index 3b0e10c33..3740df1bd 100644
--- a/snippets/createEventHub.md
+++ b/snippets/createEventHub.md
@@ -19,12 +19,14 @@ const createEventHub = () => ({
     (this.hub.get(event) || []).forEach(handler => handler(data));
   },
   on(event, handler) {
-    if (!this.hub.get(event)) this.hub.set(event, []);
-    this.hub.get(event).push(handler);
+    const handlers = this.hub.get(event);
+    if (!handlers) this.hub.set(event, []);
+    handlers.push(handler);
   },
   off(event, handler) {
-    const i = (this.hub.get(event) || []).findIndex(h => h === handler);
-    if (i > -1) this.hub.get(event).splice(i, 1);
+    const handlers = this.hub.get(event);
+    const i = (handlers || []).findIndex(h => h === handler);
+    if (i > -1) handlers.splice(i, 1);
   }
 });
 ```

From 2961ba996ac1dc6557f874fb5f36eb683c31801b Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Tue, 9 Jan 2018 08:02:35 +1100
Subject: [PATCH 13/19] Update createEventHub.md

---
 snippets/createEventHub.md | 23 +++++++++--------------
 1 file changed, 9 insertions(+), 14 deletions(-)

diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md
index 3740df1bd..555f5aaf8 100644
--- a/snippets/createEventHub.md
+++ b/snippets/createEventHub.md
@@ -2,7 +2,7 @@
 
 Creates a pub/sub ([publish–subscribe](https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern)) event hub with `emit`, `on`, and `off` methods.
 
-Instantiate a new `Map` object to allow any event type (including objects) to be the key, and also so `Object.prototype` property names are not resolved.
+Create an empty `hub` property using `Object.create(null)` to create a truly empty object that does not inherit properties from `Object.prototype` (which would be resolved if the event name matched one of the properties).
 
 For `emit`, resolve the array of handlers based on the `event` argument and then run
 each one with `Array.forEach()` by passing in the data as an argument.
@@ -14,31 +14,26 @@ For `off`, use `Array.findIndex()` to find the index of the handler in the event
 
 ```js
 const createEventHub = () => ({
-  hub: new Map(),
+  hub: Object.create(null),
   emit(event, data) {
-    (this.hub.get(event) || []).forEach(handler => handler(data));
+    (this.hub[event] || []).forEach(handler => handler(data));
   },
   on(event, handler) {
-    const handlers = this.hub.get(event);
-    if (!handlers) this.hub.set(event, []);
-    handlers.push(handler);
+    if (!this.hub[event]) this.hub[event] = [];
+    this.hub[event].push(handler);
   },
   off(event, handler) {
-    const handlers = this.hub.get(event);
-    const i = (handlers || []).findIndex(h => h === handler);
-    if (i > -1) handlers.splice(i, 1);
+    const i = (this.hub[event] || []).findIndex(h => h === handler);
+    if (i > -1) this.hub[event].splice(i, 1);
   }
 });
 ```
 
 ```js
 const fn = data => console.log(data);
-const obj = {};
-
 const hub = createEventHub();
+
 hub.on('message', fn); // subscribe a handler to listen for 'message' events
-hub.on(obj, fn); // subscribe a handler to listen for the object
 hub.emit('message', 'hello!'); // console logs 'hello!'
-hub.emit(obj, 'hello!'); // console logs 'hello!'
-hub.off('message', fn); // unsubscribe our handler from 'message', the obj event will still work
+hub.off('message', fn); // unsubscribe our handler from 'message'
 ```

From da99919b6d1f4a78ad44544274150cf2d70d2a4e Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Tue, 9 Jan 2018 08:42:54 +1100
Subject: [PATCH 14/19] Update createEventHub.md

---
 snippets/createEventHub.md | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md
index 555f5aaf8..a19b11558 100644
--- a/snippets/createEventHub.md
+++ b/snippets/createEventHub.md
@@ -30,10 +30,10 @@ const createEventHub = () => ({
 ```
 
 ```js
-const fn = data => console.log(data);
+const fn = data => console.log(data.hello);
 const hub = createEventHub();
 
-hub.on('message', fn); // subscribe a handler to listen for 'message' events
-hub.emit('message', 'hello!'); // console logs 'hello!'
-hub.off('message', fn); // unsubscribe our handler from 'message'
+hub.on('message', fn); // subscribe the handler to listen for 'message' events
+hub.emit('message', { hello: 'world' }); // logs 'world'
+hub.off('message', fn); // unsubscribe the handler from 'message' events
 ```

From 409a05e52c1cb85f5004b8b8ef997d5a8cca502e Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Tue, 9 Jan 2018 09:15:59 +1100
Subject: [PATCH 15/19] More extensive examples

---
 snippets/createEventHub.md | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md
index a19b11558..83b9e78da 100644
--- a/snippets/createEventHub.md
+++ b/snippets/createEventHub.md
@@ -30,10 +30,18 @@ const createEventHub = () => ({
 ```
 
 ```js
-const fn = data => console.log(data.hello);
+const handler = data => console.log(data);
 const hub = createEventHub();
 
-hub.on('message', fn); // subscribe the handler to listen for 'message' events
-hub.emit('message', { hello: 'world' }); // logs 'world'
-hub.off('message', fn); // unsubscribe the handler from 'message' events
+// Listen for different types of events
+hub.on('message', handler); // subscribe the handler to listen for a 'message' event
+hub.on('message', () => console.log('Message event fired')); // subscribe a different handler to listen for a 'message' event
+hub.on('double', number => console.log(number * 2));  // subscribe a handler to listen for a 'double' event
+
+// Emit events to invoke all subscribed handlers to them, passing the data to them as an argument
+hub.emit('message', 'hello world'); // logs 'hello world' and 'Message event fired'
+hub.emit('message', { hello: 'world' }); // logs the object and 'Message event fired'
+hub.emit('double', 5); // logs 10
+
+hub.off('message', handler); // unsubscribe a single handler from the 'message' event
 ```

From bdae0ed89f6bb940a83e7f8aa3fdc31a2d49ba58 Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Tue, 9 Jan 2018 09:17:15 +1100
Subject: [PATCH 16/19] Update createEventHub.md

---
 snippets/createEventHub.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md
index 83b9e78da..57ed523b7 100644
--- a/snippets/createEventHub.md
+++ b/snippets/createEventHub.md
@@ -38,7 +38,7 @@ hub.on('message', handler); // subscribe the handler to listen for a 'message' e
 hub.on('message', () => console.log('Message event fired')); // subscribe a different handler to listen for a 'message' event
 hub.on('double', number => console.log(number * 2));  // subscribe a handler to listen for a 'double' event
 
-// Emit events to invoke all subscribed handlers to them, passing the data to them as an argument
+// Emit events to invoke all handlers subscribed to them, passing the data to them as an argument
 hub.emit('message', 'hello world'); // logs 'hello world' and 'Message event fired'
 hub.emit('message', { hello: 'world' }); // logs the object and 'Message event fired'
 hub.emit('double', 5); // logs 10

From b906114c10501496bae58986df2b38e602be47c3 Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Tue, 9 Jan 2018 09:21:32 +1100
Subject: [PATCH 17/19] Update createEventHub.md

---
 snippets/createEventHub.md | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md
index 57ed523b7..44eb57063 100644
--- a/snippets/createEventHub.md
+++ b/snippets/createEventHub.md
@@ -32,16 +32,18 @@ const createEventHub = () => ({
 ```js
 const handler = data => console.log(data);
 const hub = createEventHub();
+let increment = 0;
 
-// Listen for different types of events
-hub.on('message', handler); // subscribe the handler to listen for a 'message' event
-hub.on('message', () => console.log('Message event fired')); // subscribe a different handler to listen for a 'message' event
-hub.on('double', number => console.log(number * 2));  // subscribe a handler to listen for a 'double' event
+// Subscribe/listen for different types of events
+hub.on('message', handler);
+hub.on('message', () => console.log('Message event fired'));
+hub.on('increment', () => increment++);
 
 // Emit events to invoke all handlers subscribed to them, passing the data to them as an argument
 hub.emit('message', 'hello world'); // logs 'hello world' and 'Message event fired'
 hub.emit('message', { hello: 'world' }); // logs the object and 'Message event fired'
-hub.emit('double', 5); // logs 10
+hub.emit('increment'); // `increment` variable is now 1
 
-hub.off('message', handler); // unsubscribe a single handler from the 'message' event
+// Unsubscribe/unlisten a handler from the 'message' event
+hub.off('message', handler); 
 ```

From a098cc63315f3fcf439a48e14c59ef8d589ebde6 Mon Sep 17 00:00:00 2001
From: atomiks <sprytex@gmail.com>
Date: Tue, 9 Jan 2018 09:32:47 +1100
Subject: [PATCH 18/19] Update createEventHub.md

---
 snippets/createEventHub.md | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md
index 44eb57063..c368d5d6e 100644
--- a/snippets/createEventHub.md
+++ b/snippets/createEventHub.md
@@ -2,7 +2,7 @@
 
 Creates a pub/sub ([publish–subscribe](https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern)) event hub with `emit`, `on`, and `off` methods.
 
-Create an empty `hub` property using `Object.create(null)` to create a truly empty object that does not inherit properties from `Object.prototype` (which would be resolved if the event name matched one of the properties).
+Set a `hub` property using `Object.create(null)` to create a truly empty object that does not inherit properties from `Object.prototype` (which would be resolved if the event name matched one of the properties).
 
 For `emit`, resolve the array of handlers based on the `event` argument and then run
 each one with `Array.forEach()` by passing in the data as an argument.
@@ -34,16 +34,16 @@ const handler = data => console.log(data);
 const hub = createEventHub();
 let increment = 0;
 
-// Subscribe/listen for different types of events
+// Subscribe: listen for different types of events
 hub.on('message', handler);
 hub.on('message', () => console.log('Message event fired'));
 hub.on('increment', () => increment++);
 
-// Emit events to invoke all handlers subscribed to them, passing the data to them as an argument
+// Publish: emit events to invoke all handlers subscribed to them, passing the data to them as an argument
 hub.emit('message', 'hello world'); // logs 'hello world' and 'Message event fired'
 hub.emit('message', { hello: 'world' }); // logs the object and 'Message event fired'
 hub.emit('increment'); // `increment` variable is now 1
 
-// Unsubscribe/unlisten a handler from the 'message' event
+// Unsubscribe: stop a specific handler from listening to the 'message' event
 hub.off('message', handler); 
 ```

From c7310ca70be2aa4d00f3e3b2601c0d353d611bac Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Tue, 9 Jan 2018 14:17:33 +0200
Subject: [PATCH 19/19] Update createEventHub.md

---
 snippets/createEventHub.md | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md
index c368d5d6e..de2b0139e 100644
--- a/snippets/createEventHub.md
+++ b/snippets/createEventHub.md
@@ -2,14 +2,10 @@
 
 Creates a pub/sub ([publish–subscribe](https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern)) event hub with `emit`, `on`, and `off` methods.
 
-Set a `hub` property using `Object.create(null)` to create a truly empty object that does not inherit properties from `Object.prototype` (which would be resolved if the event name matched one of the properties).
-
-For `emit`, resolve the array of handlers based on the `event` argument and then run
-each one with `Array.forEach()` by passing in the data as an argument.
-
+Use `Object.create(null)` to create an empty `hub` object that does not inherit properties from `Object.prototype`.
+For `emit`, resolve the array of handlers based on the `event` argument and then run each one with `Array.forEach()` by passing in the data as an argument.
 For `on`, create an array for the event if it does not yet exist, then use `Array.push()` to add the handler
 to the array.
-
 For `off`, use `Array.findIndex()` to find the index of the handler in the event array and remove it using `Array.splice()`.
 
 ```js