Add Load A Module And Execute A Statement as a Ruby TIL

README.md

@@ -10,7 +10,7 @@ working across different projects via [VisualMode](https://www.visualmode.dev/).
 
 For a steady stream of TILs, [sign up for my newsletter](https://visualmode.kit.com/newsletter).
 
-_1755 TILs and counting..._
+_1756 TILs and counting..._
 
 See some of the other learning resources I work on:
 
@@ -1451,6 +1451,7 @@ If you've learned something here, support my efforts writing daily TILs by
 - [Limit Split](ruby/limit-split.md)
 - [List The Running Ruby Version](ruby/list-the-running-ruby-version.md)
 - [Listing Local Variables](ruby/listing-local-variables.md)
+- [Load A Module And Execute A Statement](ruby/load-a-module-and-execute-a-statement.md)
 - [Make A Long String Of Text Readable](ruby/make-a-long-string-of-text-readable.md)
 - [Make An Executable Ruby Script](ruby/make-an-executable-ruby-script.md)
 - [Make Structs Easier To Use With Keyword Initialization](ruby/make-structs-easier-to-use-with-keyword-initialization.md)

ruby/load-a-module-and-execute-a-statement.md

@@ -0,0 +1,25 @@
+# Load A Module And Execute A Statement
+
+Here is a nice one-liner pattern for use with the `ruby` executable.
+
+```bash
+$ ruby -r file.rb -e 'MyClass.do_something'
+```
+
+The `-r` flag loads (requires, really) a Ruby file at the specified path. The
+`-e` flag will execute the line of Ruby code that you give it, in that context.
+In combination that means I can load some module into the execution environment
+and then I can run some code that uses that module.
+
+A more practical example of that is how I demonstrated the behavior of a
+`MarkdownHelpers` module in [Create A Module Of Utility
+Functions](create-a-module-of-utility-functions.md).
+
+```bash
+$ ruby -r ./markdown_helpers.rb -e 'puts MarkdownHelpers.link("Click here", "https://example.com")'
+[Click here](https://example.com)
+```
+
+The `MarkdownHelpers` module that I've defined in `./markdown_helpers.rb` is
+loaded into context and I can now access and execute that module to try out
+parts of it. All in a single line in the terminal.