1 files changed, 16 insertions, 0 deletions
diff --git a/doc-tool/src/dotty/tools/dottydoc/staticsite/filters.scala b/doc-tool/src/dotty/tools/dottydoc/staticsite/filters.scala
index 2239f5a50..1569d3873 100644
--- a/doc-tool/src/dotty/tools/dottydoc/staticsite/filters.scala
+++ b/doc-tool/src/dotty/tools/dottydoc/staticsite/filters.scala
@@ -23,4 +23,20 @@ object filters {
       else array.reverse
     }
   }
+
+  /** Used to get the first element of arrays and strings:
+    *
+    * ```html
+    * {% assign array = "1,2,3,4,5" | split: "," %}
+    * {{ array | first }}
+    * ```
+    * The above snippet will render "1"
+    */
+  final class First extends Filter("first") {
+    override def apply(value: Any, params: AnyRef*): AnyRef = value match {
+      case str: String if str.nonEmpty => str.charAt(0).toString
+      case xs: Array[String] if xs.nonEmpty => xs.head
+      case _ => null
+    }
+  }
 }