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Error handling ways updated

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This commit is contained in:
kivancgnlp 2025-12-12 08:42:50 +03:00
parent aef794d020
commit 55c6d574f6
4 changed files with 58 additions and 74 deletions
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41
exercises/24_file_io/file_io2.rs
View File

@ -7,26 +7,22 @@ const TEST_OUTPUT_FILE_NAME: &str = "MultiLineOutputFile.txt";
fn main() {
create_required_files();
let input_file = fs::File::open(TEST_INPUT_FILE_NAME);
if input_file.is_err() {
panic!("Input file open error");
}
let input_file = match fs::File::open(TEST_INPUT_FILE_NAME) {
Ok(f) => f,
Err(e) => panic!("Input file open error : {}", e),
};
let buffered_input_file = BufReader::new(input_file);
let output_file = match fs::File::create(TEST_OUTPUT_FILE_NAME){
Ok(f) => f,
Err(e) => panic!("Output file open error : {}", e),
};
// TODO : How to create a new BufReader using input file
let buffered_input_file =;
let output_file = fs::File::create(TEST_OUTPUT_FILE_NAME);
if output_file.is_err() {
eprintln!(
"Output file open error : {}",
output_file.as_ref().unwrap_err()
);
panic!("Output file open error");
}
let mut buffered_file_writer = BufWriter::new(output_file.ok().unwrap());
let mut line_number = 1;
for line in buffered_input_file.lines() {
@ -59,16 +55,13 @@ fn create_required_files() {
if file_write_result.is_ok() {
println!("Multi line file created successfully!");
}else {
eprintln!(
"Error creating file : {} , error : {:?}",
file_path.display(),
file_write_result.err()
);
eprintln!("Error creating file : {} , error : {:?}", file_path.display(), file_write_result.err());
}
}
}
fn file_cleanup() {
let file_names = vec![TEST_INPUT_FILE_NAME, TEST_OUTPUT_FILE_NAME];
for file_name in file_names {
@ -79,14 +72,12 @@ fn file_cleanup() {
if remove_status.is_ok() {
println!("Successfully deleted file {}", file_name);
}else {
eprintln!(
"Error deleting file {}, err : {:?}",
file_name,
remove_status.err()
);
eprintln!("Error deleting file {}, err : {:?}", file_name, remove_status.err());
}
}else {
println!("No cleanup necassary since {} not exist.", file_name);
}
}
}

19
exercises/24_file_io/file_io3.rs
View File

@ -11,19 +11,20 @@ fn main() {
// TODO : How to get metadata using path_buffer ?
let meta_data_result = path_buffer.
if let Ok(meta_data) = meta_data_result {
match meta_data_result {
Ok(meta_data) => {
println!("Metadata about the file : {:?}", path_buffer);
println!("File creation time {:?}", meta_data.created());
println!("File size {}", meta_data.len());
assert_eq!(meta_data.len(), 117);
println!("File permissions {:?}", meta_data.permissions());
assert!(!meta_data.permissions().readonly());
} else {
eprintln!(
"Could not get metadata. Error: {:?}",
meta_data_result.err()
);
}
Err(error) => {
eprintln!("Could not get metadata. Error: {:?}", error);
}
}
file_cleanup();
}
@ -49,11 +50,7 @@ fn create_required_files() {
if file_write_result.is_ok() {
println!("Multi line file created successfully!");
}else {
eprintln!(
"Error creating file : {} , error : {:?}",
file_path.display(),
file_write_result.err()
);
eprintln!("Error creating file : {} , error : {:?}", file_path.display(), file_write_result.err());
}
}
}

24
solutions/24_file_io/file_io2.rs
View File

@ -7,24 +7,20 @@ const TEST_OUTPUT_FILE_NAME: &str = "MultiLineOutputFile.txt";
fn main() {
create_required_files();
let input_file = fs::File::open(TEST_INPUT_FILE_NAME);
if input_file.is_err() {
panic!("Input file open error");
}
let input_file = match fs::File::open(TEST_INPUT_FILE_NAME) {
Ok(f) => f,
Err(e) => panic!("Input file open error : {}", e),
};
let buffered_input_file = BufReader::new(input_file.unwrap());
let buffered_input_file = BufReader::new(input_file);
let output_file = fs::File::create(TEST_OUTPUT_FILE_NAME);
let output_file = match fs::File::create(TEST_OUTPUT_FILE_NAME) {
Ok(f) => f,
Err(e) => panic!("Output file open error : {}", e),
};
if output_file.is_err() {
eprintln!(
"Output file open error : {}",
output_file.as_ref().unwrap_err()
);
panic!("Output file open error");
}
let mut buffered_file_writer = BufWriter::new(output_file.ok().unwrap());
let mut buffered_file_writer = BufWriter::new(output_file);
let mut line_number = 1;

12
solutions/24_file_io/file_io3.rs
View File

@ -10,18 +10,18 @@ fn main() {
let meta_data_result = path_buffer.metadata();
if let Ok(meta_data) = meta_data_result {
match meta_data_result {
Ok(meta_data) => {
println!("Metadata about the file : {:?}", path_buffer);
println!("File creation time {:?}", meta_data.created());
println!("File size {}", meta_data.len());
assert_eq!(meta_data.len(), 117);
println!("File permissions {:?}", meta_data.permissions());
assert!(!meta_data.permissions().readonly());
} else {
eprintln!(
"Could not get metadata. Error: {:?}",
meta_data_result.err()
);
}
Err(error) => {
eprintln!("Could not get metadata. Error: {:?}", error);
}
}
file_cleanup();