diff --git a/src/main.rs b/src/main.rs
index 0034cbd..57f19db 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -196,16 +196,15 @@ fn parse_file(file: impl io::Read) -> Result<json::JsonValue, Box<std::error::Er
 	Ok(ctx.data.clone())
 }
 
-// split vector to a vector of slices
-#[allow(clippy::ptr_arg)]
-fn split_vec<'a, T>(src: &'a Vec<T>, num: usize) -> Vec<&'a [T]> {
+// split slice to a vector of slices
+fn split_vec<'a, T>(src: &'a [T], num: usize) -> Vec<&'a [T]> {
 	let all_len = src.len();
 	let part_len = all_len / num;
 	let add_len = all_len % num;
 	let mut result = Vec::<&'a [T]>::new();
 
-	if 1 > part_len {
-		result.push(src.as_slice());
+	if 0 == part_len {
+		result.push(src);
 		return result;
 	}
 	for i in 0..num {