Fix examples

docs/src/rust/Cargo.toml

@@ -35,6 +35,9 @@ path = "user-guide/basics/joins.rs"
 name = "user-guide-basics-reading-writing"
 path = "user-guide/basics/reading-writing.rs"
 required-features = ["polars/json"]
+[[bin]]
+name = "user-guide-basics-series-dataframes"
+path = "user-guide/basics/series-dataframes.rs"
 
 [[bin]]
 name = "user-guide-concepts-contexts"

docs/src/rust/user-guide/basics/series-dataframes.rs

@@ -1,55 +1,51 @@
-use polars::prelude::*;
+fn main() {
+    // --8<-- [start:series]
+    use polars::prelude::*;
 
-fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let s = Series::new("a", &[1, 2, 3, 4, 5]);
 
-// --8<-- [start:series]
-	let s = Series::new("a", &[1, 2, 3, 4, 5])
+    println!("{}", s);
+    // --8<-- [end:series]
 
-	println!("{}", s)
-// --8<-- [end:series]
+    // --8<-- [start:dataframe]
+    use chrono::NaiveDate;
 
-// --8<-- [start:dataframe]
-	use chrono::NaiveDate;
+    let df: DataFrame = df!(
+        "integer" => &[1, 2, 3, 4, 5],
+        "date" => &[
+            NaiveDate::from_ymd_opt(2025, 1, 1).unwrap().and_hms_opt(0, 0, 0).unwrap(),
+            NaiveDate::from_ymd_opt(2025, 1, 2).unwrap().and_hms_opt(0, 0, 0).unwrap(),
+            NaiveDate::from_ymd_opt(2025, 1, 3).unwrap().and_hms_opt(0, 0, 0).unwrap(),
+            NaiveDate::from_ymd_opt(2025, 1, 4).unwrap().and_hms_opt(0, 0, 0).unwrap(),
+            NaiveDate::from_ymd_opt(2025, 1, 5).unwrap().and_hms_opt(0, 0, 0).unwrap(),
+        ],
+        "float" => &[4.0, 5.0, 6.0, 7.0, 8.0]
+    )
+    .unwrap();
 
-	let df: DataFrame = df!(
-		"integer" => &[1, 2, 3, 4, 5],
-		"date" => &[
-				NaiveDate::from_ymd_opt(2025, 1, 1).unwrap().and_hms_opt(0, 0, 0).unwrap(),
-				NaiveDate::from_ymd_opt(2025, 1, 2).unwrap().and_hms_opt(0, 0, 0).unwrap(),
-				NaiveDate::from_ymd_opt(2025, 1, 3).unwrap().and_hms_opt(0, 0, 0).unwrap(),
-				NaiveDate::from_ymd_opt(2025, 1, 4).unwrap().and_hms_opt(0, 0, 0).unwrap(),
-				NaiveDate::from_ymd_opt(2025, 1, 5).unwrap().and_hms_opt(0, 0, 0).unwrap(),
-		],
-		"float" => &[4.0, 5.0, 6.0, 7.0, 8.0]
-	)
-	.unwrap();
+    println!("{}", df);
+    // --8<-- [end:dataframe]
 
-	println!("{}", df)
-// --8<-- [end:dataframe]
+    // --8<-- [start:head]
+    let df_head = df.head(Some(3));
 
-// --8<-- [start:head]
-	let df_head = df.head(Some(3))
+    println!("{}", df_head);
+    // --8<-- [end:head]
 
-	println("{}", df_head)
-// --8<-- [end:head]
+    // --8<-- [start:tail]
+    let df_tail = df.tail(Some(3));
 
-// --8<-- [start:tail]
-	let df_tail = df.tail(Some(3))
+    println!("{}", df_tail);
+    // --8<-- [end:tail]
 
-	println!("{}", df_tail)
-// --8<-- [end:tail]
+    // --8<-- [start:sample]
+    let n = Series::new("", &[2]);
+    let sampled_df = df.sample_n(&n, false, false, None).unwrap();
 
-// --8<-- [start:sample]
-	let s1 = Series::new("", &[2]);
+    println!("{}", sampled_df);
+    // --8<-- [end:sample]
 
-	let sampled_df = df.sample_n(&s1, false, false, None);
-
-	println!("{:?}", sampled_df);
-// --8<-- [end:sample]
-
-// --8<-- [start:describe]
-	    // Not available in Rust
-// --8<-- [end:describe]
-
-	Ok(())
-}
+    // --8<-- [start:describe]
+    // Not available in Rust
+    // --8<-- [end:describe]
+}