clippy lint

Author: kosiew

datafusion/core/src/dataframe/mod.rs

@@ -1989,12 +1989,9 @@ impl DataFrame {
         names
             .iter()
             .map(|name| {
-                schema
-                    .field_with_name(None, name)
-                    .map(|f| f.clone())
-                    .map_err(|_| {
-                        DataFusionError::Plan(format!("Column '{}' not found", name))
-                    })
+                schema.field_with_name(None, name).cloned().map_err(|_| {
+                    DataFusionError::Plan(format!("Column '{}' not found", name))
+                })
             })
             .collect()
     }

datafusion/core/tests/dataframe/mod.rs

@@ -5375,7 +5375,7 @@ async fn test_fill_null() -> Result<()> {
         )?;
 
     let results = df_filled.collect().await?;
-    let expected = vec![
+    let expected = [
         "+---+---------+",
         "| a | b       |",
         "+---+---------+",
@@ -5399,7 +5399,7 @@ async fn test_fill_null_all_columns() -> Result<()> {
 
     let results = df_filled.clone().collect().await?;
 
-    let expected = vec![
+    let expected = [
         "+---+---------+",
         "| a | b       |",
         "+---+---------+",
@@ -5414,7 +5414,7 @@ async fn test_fill_null_all_columns() -> Result<()> {
     let df_filled = df_filled.fill_null(ScalarValue::Int32(Some(0)), None)?;
 
     let results = df_filled.collect().await?;
-    let expected = vec![
+    let expected = [
         "+---+---------+",
         "| a | b       |",
         "+---+---------+",