append

szabgab · Aug 15, 2023 · cc722ed · cc722ed
1 parent 6fb3c83
commit cc722ed
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diff --git a/rust/examples/files/append.rs b/rust/examples/files/append.rs
@@ -0,0 +1,13 @@
+use std::fs::File;
+use std::io::Write;
+
+fn main() {
+    let filename = "data.txt";
+    let mut fh = match File::options().append(true).open(filename) {
+        Ok(fh) => fh,
+        Err(_) => {
+            File::create(filename).unwrap()
+        }
+    };
+    writeln!(&mut fh, "Hello").unwrap();
+}
diff --git a/rust/files.md b/rust/files.md
@@ -8,6 +8,9 @@
 {i: create}
 {i: writeln!}
 
+* [std::fs::File](https://doc.rust-lang.org/std/fs/struct.File.html)
+* [std::io::Write](https://doc.rust-lang.org/std/io/trait.Write.html)
+
 ![](examples/files/write.rs)
 
 ## Rust - read content of a file as a string
@@ -98,3 +101,8 @@
 
 ![](examples/files/open_file_handling.rs)
 
+## Appand to file
+{id: append-to-file}
+
+![](examples/files/append.rs)
+