Data commit

Task/Abbreviations-automatic/Rust/abbreviations-automatic.rust

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+/**
+ * Abbreviations from tintenalarm.de
+ */
+use std::fs::File;
+use std::io;
+use std::io::{BufRead, BufReader};
+
+fn main() {
+    let table = read_days("weekdays.txt").expect("Error in Function read_days:");
+    for line in table {
+        if line.len() == 0 {
+            continue;
+        };
+        let mut max_same = 0;
+        for i in 0..(line.len() - 1) {
+            for j in i + 1..line.len() {
+                max_same = max_same.max(begins_with_num_same_chars(&line[i], &line[j]));
+            }
+        }
+        println!("{}\t{:?}", max_same + 1, line);
+    }
+}
+
+fn read_days(filename: &str) -> io::Result<Vec<Vec<String>>> {
+    let f = File::open(filename)?;
+    let reader = BufReader::new(f);
+    let mut table: Vec<Vec<String>> = Vec::new();
+    for line in reader.lines() {
+        let mut days: Vec<String> = Vec::with_capacity(7);
+        for day in line?.split_whitespace() {
+            days.push(day.to_string());
+        }
+        table.push(days);
+    }
+    Ok(table)
+}
+
+fn begins_with_num_same_chars(str_a: &str, str_b: &str) -> u32 {
+    let mut num = 0;
+    for (pos, char_a) in str_a.chars().enumerate() {
+        match str_b.chars().nth(pos) {
+            Some(char_b) => {
+                if char_a == char_b {
+                    num = num + 1;
+                } else {
+                    return num;
+                }
+            }
+            None => return num,
+        }
+    }
+    num
+}