[FIX] fix issues with clippy errors and rename files

Author: carpecodeum

parquet-variant/examples/variant_to_json.rs renamed to parquet-variant/examples/variant_to_json_examples.rs

@@ -17,4 +17,4 @@
 
 //! Encoder module for converting Variant values to other formats
 
-pub mod json; 
+pub mod variant_to_json; 

parquet-variant/src/encoder.rs

@@ -37,4 +37,4 @@ mod variant;
 mod utils;
 
 pub use variant::*;
-pub use encoder::json::{variant_to_json, variant_to_json_string, variant_to_json_value};
+pub use encoder::variant_to_json::{variant_to_json, variant_to_json_string, variant_to_json_value};

parquet-variant/src/encoder/json.rs renamed to parquet-variant/src/encoder/variant_to_json.rs

@@ -393,11 +393,7 @@ impl<'m, 'v> VariantArray<'m, 'v> {
             };
 
             // Skip the header byte to read the num_elements
-            if let Ok(num_elements) = num_elements_size.unpack_usize(self.value, 1, 0) {
-                num_elements
-            } else {
-                0 // Return 0 if we can't parse the length
-            }
+            num_elements_size.unpack_usize(self.value, 1, 0).unwrap_or(0)
         } else {
             0 // Return 0 if we can't read the header
         }
@@ -1117,6 +1113,14 @@ impl From<(i32, u8)> for Variant<'_, '_> {
         }
     }
 }
+impl From<bool> for Variant<'_, '_> {
+    fn from(value: bool) -> Self {
+        match value {
+            true => Variant::BooleanTrue,
+            false => Variant::BooleanFalse,
+        }
+    }
+}
 
 impl From<(i64, u8)> for Variant<'_, '_> {
     fn from(value: (i64, u8)) -> Self {