diff --git a/src/lib.zig b/src/lib.zig
index 6d399e6f0cb46c82a122afd9cd54c764b56acce8..7d7e8872f7a6f9d3dae4182fef1d6f5c33ad7c9a 100644
--- a/src/lib.zig
+++ b/src/lib.zig
@@ -461,3 +461,10 @@ pub fn nullifyS(s: ?string) ?string {
     if (s.?.len == 0) return null;
     return s.?;
 }
+
+pub fn sliceTo(comptime T: type, haystack: []const T, needle: T) []const T {
+    if (std.mem.indexOfScalar(T, haystack, needle)) |index| {
+        return haystack[0..index];
+    }
+    return haystack;
+}