# `create`

The `create` static method opens a file in write-only mode. If the file already existed, the old content is destroyed. Otherwise, a new file is created.

    static LOREM_IPSUM: &'static str =
    "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
    tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
    quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
    consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
    cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
    proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
    ";

    use std::error::Error;
    use std::io::prelude::*;
    use std::fs::File;
    use std::path::Path;

    fn main() {
        let path = Path::new("out/lorem_ipsum.txt");
        let display = path.display();

        // Open a file in write-only mode, returns `io::Result<File>`
        let mut file = match File::create(&path) {
            Err(why) => panic!("couldn't create {}: {}",
                               display,
                               why.description()),
            Ok(file) => file,
        };

        // Write the `LOREM_IPSUM` string to `file`, returns `io::Result<()>`
        match file.write_all(LOREM_IPSUM.as_bytes()) {
            Err(why) => {
                panic!("couldn't write to {}: {}", display,
                                                   why.description())
            },
            Ok(_) => println!("successfully wrote to {}", display),
        }
    }

Here's the expected successful output:

    $ mkdir out
    $ rustc create.rs && ./create
    successfully wrote to out/lorem_ipsum.txt
    $ cat out/lorem_ipsum.txt
    Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod
    tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
    quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
    consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
    cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
    proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

(As in the previous example, you are encouraged to test this example under failure conditions.)

There is also a more generic `open_mode` method that can open files in other modes like: read+write, append, etc.