Add Block Syntaxes Have Different Precedence as a Ruby TIL

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).
 
-_1519 TILs and counting..._
+_1520 TILs and counting..._
 
 ---
 
@@ -1188,6 +1188,7 @@ _1519 TILs and counting..._
 - [Audit Your Ruby Project For Any CVEs](ruby/audit-your-ruby-project-for-any-cves.md)
 - [Assoc For Hashes](ruby/assoc-for-hashes.md)
 - [Block Comments](ruby/block-comments.md)
+- [Block Syntaxes Have Different Precedence](ruby/block-syntaxes-have-different-precedence.md)
 - [Build HTTP And HTTPS URLs](ruby/build-http-and-https-urls.md)
 - [Chaining Multiple RSpec Change Matchers](ruby/chaining-multiple-rspec-change-matchers.md)
 - [Check For Any Overlaps In List Of Ranges](ruby/check-for-any-overlaps-in-list-of-ranges.md)

ruby/block-syntaxes-have-different-precedence.md

@@ -0,0 +1,29 @@
+# Block Syntaxes Have Different Precedence
+
+There are two syntaxes for defining a block in Ruby. The semantically shorthand
+syntax uses the curly braces (`{}`). The semantically multi-line syntax uses
+`do` and `end`. For nearly all intents and purposes they are interchangable.
+
+It is, however, worth noting that the `do`/`end` version has a lower precedence
+than the already low precedence of `{}`. That said, you have to write some
+weird code for this to become an issue.
+
+Let's say we have two methods, `method_one` and `method_two`. They are both
+called on the same line like below and then followed by a block argument. Which
+method receives the block argument?
+
+```ruby
+method_one method_two { |n|
+  puts "Executing a block: #{n}"
+}
+
+method_one method_two do |n|
+  puts "Executing a block: #{n}"
+end
+```
+
+In the first case, with the curly braces, `method_two` receives the block as an
+argument. In the second case, with the `do`/`end`, `method_one` receives the
+block as an argument.
+
+[source](http://localhost:3131/ruby-operators/curly-braces#block-shorthand)