To append to a file in Rust, you can use the OpenOptions
struct from the std::fs
module to open the file in append mode. Then, you can use the write
method from the Write
trait to write data to the end of the file.
Here's an example:
main.rs245 chars13 lines
In this example, we create OpenOptions
with the append
method set to true to open the file in append mode. We then call the open
method to open the file, which returns a std::io::Result<File>
object that we unwrap to get the file object.
Finally, we call the write
method on the file object to write data to the end of the file. Note that we convert the data to a byte slice using the as_bytes
method before passing it to the write
method.
If successful, this code will append the string "Hello, world!\n" to the end of the file "myfile.txt".
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