1 files changed, 15 insertions, 0 deletions
diff --git a/core/source/core/scala/com/rockymadden/stringmetric/filter/AsciiLetterNumberOnlyFilter.scala b/core/source/core/scala/com/rockymadden/stringmetric/filter/AsciiLetterNumberOnlyFilter.scala
new file mode 100755
index 0000000..7cf97ba
--- /dev/null
+++ b/core/source/core/scala/com/rockymadden/stringmetric/filter/AsciiLetterNumberOnlyFilter.scala
@@ -0,0 +1,15 @@
+package com.rockymadden.stringmetric.filter
+
+import com.rockymadden.stringmetric.StringFilter
+
+/** Ensures only ASCII letters and numbers matter. */
+trait AsciiLetterNumberOnlyFilter extends StringFilter {
+	abstract override def filter(charArray: Array[Char]): Array[Char] =
+		super.filter(
+			charArray.filter(c =>
+				((c >= 48 && c <= 57 ) || (c >= 65 && c <= 90 ) || (c >= 97 && c <= 122))
+			)
+		)
+
+	abstract override def filter(string: String): String = filter(string.toCharArray).mkString
+}