Merge 295fe153ad into 6b9ec224b8

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below the description to indicate that this method of accessing an indefinite number of function arguments has been superseded by the use of the spread operator via rest parameters for ES6+ compatibility.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).
 
-_1444 TILs and counting..._
+_1445 TILs and counting..._
 
 ---
 
@@ -390,6 +390,7 @@ _1444 TILs and counting..._
 
 ### Heroku
 
+- [Connect To A Database By Color](heroku/connect-to-a-database-by-color.md)
 - [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)

heroku/connect-to-a-database-by-color.md

@@ -0,0 +1,29 @@
+# Connect To A Database By Color
+
+All of your PostgreSQL databases in Heroku are given attachment names that use
+a random color. This might be _pink_, _brown_, _cobalt_, etc. And the
+attachment names then look like `HEROKU_POSTGRESQL_PINK`,
+`HEROKU_POSTGRESQL_BROWN`, `HEROKU_POSTGRESQL_COBALT`, etc.
+
+We can connect to a Heroku-managed PostgreSQL instance from the command-line
+like so:
+
+```bash
+$ heroku pg:psql --app my-app
+```
+
+This is going to connect to the _default_ database which is the one with the
+`DATABASE_URL` attachment.
+
+There are lots of instances where we may have other databases besides the
+primary (e.g. let's say we have a read replica follower). If we want to connect
+to that one, we can do so by _color_.
+
+If that database's attachment is `HEROKU_POSTGRESQL_IVORY`, then we'd connect
+to it like so:
+
+```bash
+$ heroku pg:psql ivory --app my-app
+```
+
+[source](https://devcenter.heroku.com/articles/managing-heroku-postgres-using-cli#pg-psql)

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);