POC: Feature random code snippet on landing page

_data/featured_snippets.yml

@@ -0,0 +1,35 @@
+- |
+  let names = ["Anna", "Alex", "Brian", "Jack"]
+  for name in names {
+      print("Hello, \(name)!")
+  }
+  // Hello, Anna!
+  // Hello, Alex!
+  // Hello, Brian!
+  // Hello, Jack!
+- |
+  func greet(person: String, alreadyGreeted: Bool) -> String {
+      if alreadyGreeted {
+          return greetAgain(person: person)
+      } else {
+          return greet(person: person)
+      }
+  }
+  print(greet(person: "Tim", alreadyGreeted: true))
+  // Prints "Hello again, Tim!"
+- |
+  func oneMore(than number: Int) -> Int {
+      return number + 1
+  }
+
+  var myNumber = 1
+  myNumber = oneMore(than: myNumber)
+  print(myNumber)
+  // Prints "2"
+- |
+  enum Beverage: CaseIterable {
+      case coffee, tea, juice
+  }
+  let numberOfChoices = Beverage.allCases.count
+  print("\(numberOfChoices) beverages available")
+  // Prints "3 beverages available"

assets/stylesheets/pages/_landing.scss

@@ -25,6 +25,26 @@
   }
 }
 
+.featured-snippet {
+  display: none;
+
+  &.visible {
+    display: block;
+  }
+
+  &.highlighter-rouge {
+    margin-left: 0px;
+  }
+
+  pre {
+    height: 15rem;
+    border: 1px solid var(--color-fill-tertiary);
+    border-radius: 4px;
+    padding: 1.25rem 1.5rem;
+    margin: 0px;
+  }
+}
+
 .link-grid {
   ul {
     display: grid;
@@ -55,9 +75,11 @@
       .flex-container {
         display: flex;
         flex-direction: column;
+        align-items: center;
         height: 100%;
 
         .latest-release-container {
+          height: 64px;
           flex-grow: 1;
           display: flex;
           align-items: center;

index.md

@@ -8,6 +8,13 @@ atom: true
 
 Swift is a general-purpose programming language built using a modern approach to safety, performance, and software design patterns.
 
+{% for snippet in site.data.featured_snippets %}
+```swift
+{{ snippet -}}
+```
+{: class="featured-snippet {% if forloop.first %}visible{% endif %}" }
+{% endfor %}
+
 <div class="link-grid" markdown="1">
   <ul>
     <li>
@@ -126,3 +133,12 @@ Stay up-to-date with the latest in the Swift community.
   - [Visit the Swift forums](https://forums.swift.org)
   - [Follow @Swiftlang on Twitter](https://twitter.com/swiftlang){:target="_blank" class="link-external"}
 </div>
+
+<script>
+  var featuredSnippets = document.querySelectorAll('.featured-snippet');
+  var visibleSnippet = document.querySelector('.featured-snippet.visible');
+  var randomIndex = Math.floor(Math.random() * featuredSnippets.length);
+
+  visibleSnippet?.classList.remove('visible');
+  featuredSnippets[randomIndex]?.classList.add('visible');
+</script>