1 files changed, 21 insertions, 0 deletions
diff --git a/util.go b/util.go
new file mode 100644
index 0000000..22f9cb2
--- /dev/null
+++ b/util.go
@@ -0,0 +1,21 @@
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+func Check(err error) {
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}
+
+func Insert[T any](slice []T, elem T, i int) []T {
+	return append(slice[:i], append([]T{elem}, slice[i:]...)...)
+}
+
+func Remove[T any](slice []T, i int) []T {
+	return append(slice[:i], slice[i+1:]...)
+}