Data commit

Task/Text-processing-Max-licenses-in-use/Rust/text-processing-max-licenses-in-use.rust

@@ -0,0 +1,44 @@
+type Timestamp = String;
+
+fn compute_usage<R, S, E>(lines: R) -> Result<(u32, Vec<Timestamp>), E>
+where
+    S: AsRef<str>,
+    R: Iterator<Item = Result<S, E>>,
+{
+    let mut timestamps = Vec::new();
+    let mut current = 0;
+    let mut maximum = 0;
+
+    for line in lines {
+        let line = line?;
+        let line = line.as_ref();
+
+        if line.starts_with("License IN") {
+            current -= 1;
+        } else if line.starts_with("License OUT") {
+            current += 1;
+
+            if maximum <= current {
+                let date = line.split_whitespace().nth(3).unwrap().to_string();
+
+                if maximum < current {
+                    maximum = current;
+                    timestamps.clear();
+                }
+
+                timestamps.push(date);
+            }
+        }
+    }
+
+    Ok((maximum, timestamps))
+}
+
+fn main() -> std::io::Result<()> {
+    use std::io::{BufRead, BufReader};
+    let file = std::fs::OpenOptions::new().read(true).open("mlijobs.txt")?;
+    let (max, timestamps) = compute_usage(BufReader::new(file).lines())?;
+    println!("Maximum licenses out: {}", max);
+    println!("At time(s): {:?}", timestamps);
+    Ok(())
+}