Data commit

Task/Remove-lines-from-a-file/Rust/remove-lines-from-a-file.rust

@@ -0,0 +1,34 @@
+extern crate rustc_serialize;
+extern crate docopt;
+
+use docopt::Docopt;
+
+use std::io::{BufReader,BufRead};
+use std::fs::File;
+
+const USAGE: &'static str = "
+Usage: rosetta <start> <count> <file>
+";
+
+#[derive(Debug, RustcDecodable)]
+struct Args {
+    arg_start: usize,
+    arg_count: usize,
+    arg_file: String,
+}
+
+fn main() {
+    let args: Args = Docopt::new(USAGE)
+        .and_then(|d| d.decode())
+        .unwrap_or_else(|e| e.exit());
+
+    let file = BufReader::new(File::open(args.arg_file).unwrap());
+
+    for (i, line) in file.lines().enumerate() {
+        let cur = i + 1;
+
+        if cur < args.arg_start || cur >= (args.arg_start + args.arg_count) {
+            println!("{}", line.unwrap());
+        }
+    }
+}