1 files changed, 10 insertions, 1 deletions

diff --git a/util.lua b/util.lua
index bb9b2e8..157d7ad 100644
--- a/util.lua
+++ b/util.lua
@@ -49,4 +49,13 @@ function filter(a, pred)
         end
     end
     return filtered
-end
\ No newline at end of file
+end
+
+function fmt(x)
+    t = type(x)
+    if t == "number" then return "" .. x
+    elseif t == "string" then return x
+    elseif t == "boolean" and x then return "true"
+    elseif t == "boolean" and not x then return "false" end
+    return "NA"
+end