Merge 295fe153ad into 25b5677260

Hello, I've added a small blockquote below the description to indicate that this method of accessing an indefinite number of function arguments has been superseded by the use of the spread operator via rest parameters for ES6+ compatibility.

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1438 TILs and counting..._
+_1439 TILs and counting..._
 
 ---
 
@@ -392,6 +392,7 @@ _1438 TILs and counting..._
 
 - [Deploy A Review App To A Different Stack](heroku/deploy-a-review-app-to-a-different-stack.md)
 - [Diagnose Problems In A Heroku Postgres Database](heroku/diagnose-problems-in-a-heroku-postgres-database.md)
+- [Open Dashboard For Specific Add-On](heroku/open-dashboard-for-specific-add-on.md)
 - [Run SQL Against Remote Postgres Database](heroku/run-sql-against-remote-postgres-database.md)
 - [Set And Show Heroku Env Variables](heroku/set-and-show-heroku-env-variables.md)
 - [SSH Into Heroku Server Hosting App](heroku/ssh-into-heroku-server-hosting-app.md)

heroku/open-dashboard-for-specific-add-on.md

@@ -0,0 +1,17 @@
+# Open Dashboard For Specific Add-On
+
+The number of times I've needed to check the papertrail logs for my
+Heroku-hosted Rails app is a lot. I open a browser tab, go through several
+layers of navigation to get to my app's dashboard, and then click the
+papertrail link under _Add-ons_.
+
+There is a much quicker way using the Heroku CLI.
+
+```bash
+$ heroku addons:open papertrail -a my-app-name
+Opening https://addons-sso.heroku.com/apps/abc123/addons/efg456...
+```
+
+It sends you to an add-ons SSO link in the browser which authenticates you and
+drops you into the dashboard for that specific add-on. You just need to specify
+the add-on name and the app name.

javascript/accessing-arguments-to-a-function.md

@@ -5,6 +5,8 @@ an array-like object with all of the arguments to the function. Even if not
 all of the arguments are referenced in the function signature, they can
 still be accessed via the `arguments` object.
 
+> For ES6+ compatibility, the `spread` operator used via [rest parameters](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/rest_parameters) is preferred over the `arugments` object when accessing an abritrary number of function arguments.
+
 ```javascript
 function argTest(one) {
   console.log(one);