Methods for File I/O
Given below are some methods and their syntax for various file I/O operations:
|
Method |
Module |
Syntax |
Description |
|---|---|---|---|
|
fs::write() |
std::fs |
fs::write(“filepath”, “content”)?; |
Write a slice as the entire contents of a file. |
|
fs::read() |
std::fs |
let variable_name = fs::read(“filepath”); |
Read the entire contents of a file into a bytes vector. |
|
fs::read_to_string() |
std::fs |
let variable_name = fs::read_to_string(“filepath”); |
Read the entire contents of a file into a string. |
|
File::create() |
std::fs::File |
let mut variable_file_name = File::create(“filepath”)?; |
Creates a new file and write bytes to it (you can also use write()) |
|
write_all() |
std::io::Write |
variable_file_name.write_all(content.as_bytes())?; |
Attempts to write an entire buffer into this writer. |
|
File::open() |
std::fs::FIle |
let mut variable_file_name = File::open(“filepath”)?; |
Attempts to open a file in read-only mode. |
|
read_to_string() |
std::io::Read |
variable_file_name. read_to_stfing(&mut buffer)?; |
Read all bytes from a reader into a new String. the content will be copied to buffer variable. |
|
remove_file() |
std::fs |
fs::remove_file(“filepath”)?; |
Removes a file from the filesystem. |
|
copy() |
std::fs |
fs::copy(“original_filepath”, “destination_filepath”)?; |
Copies the contents of one file to another. This function will also copy the permission bits of the original file to the destination file. |
File I/O in Rust
File I/O in Rust enables us to read from and write to files on our computer. To write or read or write in a file, we need to import modules (like libraries in C++) that hold the necessary functions. This article focuses on discussing File I/O in Rust.