fix warnings

Author: friendlymatthew

src/json_to_variant.rs

@@ -155,7 +155,7 @@ mod tests {
 
         let return_field = udf
             .return_field_from_args(ReturnFieldArgs {
-                arg_fields: &[arg_field.clone()],
+                arg_fields: std::slice::from_ref(&arg_field),
                 scalar_arguments: &[],
             })
             .unwrap();
@@ -186,7 +186,7 @@ mod tests {
         let arg_field = Arc::new(Field::new("input", DataType::Utf8, true));
         let return_field = udf
             .return_field_from_args(ReturnFieldArgs {
-                arg_fields: &[arg_field.clone()],
+                arg_fields: std::slice::from_ref(&arg_field),
                 scalar_arguments: &[],
             })
             .unwrap();
@@ -241,7 +241,7 @@ mod tests {
         let arg_field = Arc::new(Field::new("input", DataType::Utf8, true));
         let return_field = udf
             .return_field_from_args(ReturnFieldArgs {
-                arg_fields: &[arg_field.clone()],
+                arg_fields: std::slice::from_ref(&arg_field),
                 scalar_arguments: &[],
             })
             .unwrap();
@@ -274,7 +274,7 @@ mod tests {
         let arg_field = Arc::new(Field::new("input", DataType::Utf8, true));
         let return_field = udf
             .return_field_from_args(ReturnFieldArgs {
-                arg_fields: &[arg_field.clone()],
+                arg_fields: std::slice::from_ref(&arg_field),
                 scalar_arguments: &[],
             })
             .unwrap();

src/shared.rs

@@ -317,7 +317,7 @@ pub fn build_variant_get_args(
 pub fn build_variant_array_from_json_array(jsons: &[Option<serde_json::Value>]) -> VariantArray {
     let mut builder = VariantArrayBuilder::new(jsons.len());
 
-    jsons.into_iter().for_each(|v| match v.as_ref() {
+    jsons.iter().for_each(|v| match v.as_ref() {
         Some(json) => builder.append_json(json.to_string().as_str()).unwrap(),
         None => builder.append_null(),
     });

src/variant_normalize.rs

@@ -160,7 +160,7 @@ mod tests {
         );
         let return_field = udf
             .return_field_from_args(ReturnFieldArgs {
-                arg_fields: &[arg_field.clone()],
+                arg_fields: std::slice::from_ref(&arg_field),
                 scalar_arguments: &[],
             })
             .unwrap();
@@ -195,7 +195,7 @@ mod tests {
         );
         let return_field = udf
             .return_field_from_args(ReturnFieldArgs {
-                arg_fields: &[arg_field.clone()],
+                arg_fields: std::slice::from_ref(&arg_field),
                 scalar_arguments: &[],
             })
             .unwrap();
@@ -377,7 +377,7 @@ mod tests {
         );
         let return_field = udf
             .return_field_from_args(ReturnFieldArgs {
-                arg_fields: &[arg_field.clone()],
+                arg_fields: std::slice::from_ref(&arg_field),
                 scalar_arguments: &[],
             })
             .unwrap();
@@ -448,7 +448,7 @@ mod tests {
         );
         let return_field = udf
             .return_field_from_args(ReturnFieldArgs {
-                arg_fields: &[arg_field.clone()],
+                arg_fields: std::slice::from_ref(&arg_field),
                 scalar_arguments: &[],
             })
             .unwrap();