Merge 5615da920f into 4f2399de13

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).
 
-_1513 TILs and counting..._
+_1514 TILs and counting..._
 
 ---
 
@@ -190,7 +190,7 @@ _1513 TILs and counting..._
 - [Aliasing An Ansible Host](devops/aliasing-an-ansible-host.md)
 - [Allow Cross-Origin Requests To Include Cookies](devops/allow-cross-origin-requests-to-include-cookies.md)
 - [Allow HTTPS Through Your UFW Firewall](devops/allow-https-through-your-ufw-firewall.md)
-- [Check For Cached Site Assocation File For iOS](devops/check-for-cached-site-association-file-for-ios.md)
+- [Check For Cached Site Association File For iOS](devops/check-for-cached-site-association-file-for-ios.md)
 - [Check The Status of All Services](devops/check-the-status-of-all-services.md)
 - [Check The Syntax Of nginx Files](devops/check-the-syntax-of-nginx-files.md)
 - [Connect To An RDS PostgreSQL Database](devops/connect-to-an-rds-postgresql-database.md)
@@ -723,7 +723,7 @@ _1513 TILs and counting..._
 - [Check If Clusters Are Upgrade Compatible](postgres/check-if-clusters-are-upgrade-compatible.md)
 - [Check If The Local Server Is Running](postgres/check-if-the-local-server-is-running.md)
 - [Check If User Role Exists For Database](postgres/check-if-user-role-exists-for-database.md)
-- [Check Table For Any Oprhaned Records](postgres/check-table-for-any-orphaned-records.md)
+- [Check Table For Any Orphaned Records](postgres/check-table-for-any-orphaned-records.md)
 - [Checking Inequality](postgres/checking-inequality.md)
 - [Checking The Type Of A Value](postgres/checking-the-type-of-a-value.md)
 - [Clear The Screen In psql](postgres/clear-the-screen-in-psql.md)
@@ -1040,6 +1040,7 @@ _1513 TILs and counting..._
 - [Update Column Versus Update Attribute](rails/update-column-versus-update-attribute.md)
 - [Upgrading Your Manifest For Sprocket's 4](rails/upgrading-your-manifest-for-sprockets-4.md)
 - [Use IRB And Ruby Flags With Rails Console](rails/use-irb-and-ruby-flags-with-rails-console.md)
+- [Useful ActiveSupport Constants For Durations](rails/useful-active-support-constants-for-durations.md)
 - [Validate Column Data With Check Constraints](rails/validate-column-data-with-check-constraints.md)
 - [Verify And Read A Signed Cookie Value](rails/verify-and-read-a-signed-cookie-value.md)
 - [Where Am I In The Partial Iteration?](rails/where-am-i-in-the-partial-iteration.md)

rails/useful-active-support-constants-for-durations.md

@@ -0,0 +1,45 @@
+# Useful ActiveSupport Constants For Durations
+
+Whenever I'm passing a duration to a function, I like to [name it with the
+unit](https://ruudvanasseldonk.com/2022/03/20/please-put-units-in-names)
+relative to the value it represents. For instance, if I need to pass in an hour
+duration in seconds, I might write the following line:
+
+```ruby
+hour_in_seconds = 60 * 60
+
+# or
+
+hour_in_seconds = 3600
+```
+
+ActiveSupport has a [Duration
+class](https://api.rubyonrails.org/classes/ActiveSupport/Duration.html) with a
+series of constants that we can reach for.
+
+```ruby
+> ActiveSupport::Duration::SECONDS_PER_MINUTE
+=> 60
+> ActiveSupport::Duration::SECONDS_PER_HOUR
+=> 3600
+> ActiveSupport::Duration::SECONDS_PER_DAY
+=> 86400
+> ActiveSupport::Duration::SECONDS_PER_WEEK
+=> 604800
+> ActiveSupport::Duration::SECONDS_PER_MONTH
+=> 2629746
+> ActiveSupport::Duration::SECONDS_PER_YEAR
+=> 31556952
+```
+
+Though it is fun to know about these, we should keep in mind that this class
+provides support for what is likely to be a more useful abstraction layer:
+
+```ruby
+> 1.hour
+=> 1 hour
+> 3.hours
+=> 3 hours
+> 1.day.to_i
+=> 86400
+```