Merge 5615da920f into 97c8701a5a

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).
 
-_1585 TILs and counting..._
+_1582 TILs and counting..._
 
 See some of the other learning resources I work on:
 - [Ruby Operator Lookup](https://www.visualmode.dev/ruby-operators)
@@ -993,7 +993,6 @@ See some of the other learning resources I work on:
 - [Define The Root Path For The App](rails/define-the-root-path-for-the-app.md)
 - [Delete Paranoid Records](rails/delete-paranoid-records.md)
 - [Demodulize A Class Name](rails/demodulize-a-class-name.md)
-- [Determine The Configured Primary Key Type](rails/determine-the-configured-primary-key-type.md)
 - [Different Ways To Add A Foreign Key Reference](rails/different-ways-to-add-a-foreign-key-reference.md)
 - [Disambiguate Where In A Joined Relation](rails/disambiguate-where-in-a-joined-relation.md)
 - [Empty find_by Returns First Record](rails/empty-find-by-returns-first-record.md)
@@ -1279,7 +1278,6 @@ See some of the other learning resources I work on:
 - [Exit A Process With An Error Message](ruby/exit-a-process-with-an-error-message.md)
 - [Expect A Method To Be Called And Actually Call It](ruby/expect-a-method-to-be-called-and-actually-call-it.md)
 - [Extract A Column Of Data From A CSV File](ruby/extract-a-column-of-data-from-a-csv-file.md)
-- [Extract Capture Group Matches With String Slices](ruby/extract-capture-group-matches-with-string-slices.md)
 - [FactoryGirl Sequences](ruby/factory-girl-sequences.md)
 - [Fail](ruby/fail.md)
 - [Fetch Warns About Superseding Block Argument](ruby/fetch-warns-about-superseding-block-argument.md)
@@ -1498,7 +1496,6 @@ See some of the other learning resources I work on:
 - [Count The Lines In A CSV Where A Column Is Empty](unix/count-the-lines-in-a-csv-where-a-column-is-empty.md)
 - [Count The Number Of Matches In A Grep](unix/count-the-number-of-matches-in-a-grep.md)
 - [Count The Number Of ripgrep Pattern Matches](unix/count-the-number-of-ripgrep-pattern-matches.md)
-- [Count The Number Of Words On A Webpage](unix/count-the-number-of-words-on-a-webpage.md)
 - [Create A File Descriptor with Process Substitution](unix/create-a-file-descriptor-with-process-substitution.md)
 - [Create A Sequence Of Values With A Step](unix/create-a-sequence-of-values-with-a-step.md)
 - [Curl With Cookies](unix/curl-with-cookies.md)

rails/determine-the-configured-primary-key-type.md

@@ -1,35 +0,0 @@
-# Determine The Configured Primary Key Type
-
-I noticed an interesting helper function in the database migration generated by
-`bin/rails active_storage:install`.
-
-```ruby
-class CreateActiveStorageTables < ActiveRecord::Migration[8.0]
-  def change
-    # Use Active Record's configured type for primary and foreign keys
-    primary_key_type, foreign_key_type = primary_and_foreign_key_types
-
-    # ...
-  end
-
-  private
-
-    def primary_and_foreign_key_types
-      config = Rails.configuration.generators
-      setting = config.options[config.orm][:primary_key_type]
-      primary_key_type = setting || :primary_key
-      foreign_key_type = setting || :bigint
-      [ primary_key_type, foreign_key_type ]
-    end
-end
-```
-
-The `primary_and_foreign_key_types` method looks in the generators config for
-the ORM (`:active_record`) to determine the configured `:primary_key_type`. By
-default this will return `nil`. This method then uses `:primary_key` as a
-fallback value which will be `bigint`. That's why the `foreign_key_type` falls
-back to `:bigint`.
-
-If desired, this can be manually configured in `config/application.rb` like
-shown in the [ActiveRecord Migrations
-docs](https://guides.rubyonrails.org/active_record_migrations.html#enabling-uuids-in-rails).

ruby/extract-capture-group-matches-with-string-slices.md

@@ -1,37 +0,0 @@
-# Extract Capture Group Matches With String Slices
-
-Ruby's _string slice_ syntax allows us to use the square brackets to access
-portions of a string. It's most common to pass positional integer index
-arguments or a range. However, in true Ruby fashion, another way of thinking
-about defining the slice of a string is based on a regex match.
-
-We can pass a regex and an int (specifying which match we want) to extract some
-portion of a string based on the regex match. That includes capture groups.
-
-Here are a couple examples of extracting matching capture groups as well as
-getting the entire regex match:
-
-```ruby
-> "me+abc123@email.com"[/.+\+(.+)@(.+)/, 1]
-=> "abc123"
-
-> "me+abc123@email.com"[/.+\+(.+)@(.+)/, 2]
-=> "email.com"
-
-> "me+abc123@email.com"[/.+\+(.+)@(.+)/, 0]
-=> "me+abc123@email.com"
-
-> "me+abc123@email.com"[/.+\+(.+)@(.+)/]
-=> "me+abc123@email.com"
-```
-
-The `0`th match (which is the default) corresponds to the full match. Each
-integer position after that corresponds to any capture groups. This maps
-directly to the underlying `MatchData` object:
-
-```ruby
-> /.+\+(.+)@(.+)/.match("me+abc123@email.com")
-=> #<MatchData "me+abc123@email.com" 1:"abc123" 2:"email.com">
-```
-
-[source](https://ruby-doc.org/3.3.6/String.html#class-String-label-String+Slices)

unix/count-the-number-of-words-on-a-webpage.md

@@ -1,25 +0,0 @@
-# Count The Number Of Words On A Webpage
-
-I was reading through a couple sections of the `postfix` documentation and I
-was astounded at how large the webpage is, and that is just for the `main.cf`
-file format.
-
-Curiosity got the best of me and I wanted to get a sense of the magnitude of
-the page. A word count seemed like a good measure.
-
-Using `pandoc` and a couple other unix utilities, I was able to quickly get
-that number.
-
-```bash
-curl -s http://www.postfix.org/postconf.5.html\#virtual_mailbox_maps | pandoc -f html -t plain | wc -w
-   88383
-```
-
-Generically, that is:
-
-```bash
-curl -s url | pandoc -f html -t plain | wc -w
-```
-
-Pandoc produces a plain-text version of the HTML page that was pulled in by
-`curl` and then we use `wc` to get a word (`-w`) count.