1 files changed, 20 insertions, 0 deletions
diff --git a/concat.go b/concat.go
new file mode 100644
index 0000000..a516dae
--- /dev/null
+++ b/concat.go
@@ -0,0 +1,20 @@
+package badtudexo
+
+import (
+	st "saggytrousers"
+	"errors"
+)
+
+// Take two sheets, and concatenate them. 
+// Note: this done wrong at the moment, it should take [][]string not []string.
+func Concat(fst, snd []string) []string {
+	return append(append([]string{}, fst...), snd...)
+} 
+
+func ConcatCheckHeaders(fst, snd, fsthd, sndhd []string) ([]string, error) {
+	if !st.SliceEq(fsthd, sndhd) {
+		return []string{}, errors.New("Header mismatch")
+	}
+
+	return Concat(fst, snd), nil
+}