feat(347): completed both challenges

2 files changed, 55 insertions, 0 deletions

diff --git a/challenge-347/benjamin-andre/rust/ch-1.rs b/challenge-347/benjamin-andre/rust/ch-1.rs
new file mode 100755
index 0000000000..fa058a8cfe
--- /dev/null
+++ b/challenge-347/benjamin-andre/rust/ch-1.rs
@@ -0,0 +1,27 @@
+#!/bin/sh
+//usr/bin/env rustc --test $0 -o kachow && ./kachow --nocapture; rm -f kachow ; exit
+
+fn format_date(s: &str) -> String {
+    let months = [
+        "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
+    ];
+    let parts: Vec<_> = s.split_whitespace().collect();
+    let day: u32 = parts[0]
+        .chars()
+        .filter(|c| c.is_ascii_digit())
+        .collect::<String>()
+        .parse()
+        .unwrap();
+    let month = months.iter().position(|&m| m == parts[1]).unwrap() + 1;
+    let year = parts[2];
+    format!("{}-{:02}-{:02}", year, month, day)
+}
+
+#[test]
+fn example() {
+    assert_eq!(format_date("1st Jan 2025"), "2025-01-01");
+    assert_eq!(format_date("22nd Feb 2025"), "2025-02-22");
+    assert_eq!(format_date("15th Apr 2025"), "2025-04-15");
+    assert_eq!(format_date("23rd Oct 2025"), "2025-10-23");
+    assert_eq!(format_date("31st Dec 2025"), "2025-12-31");
+}
diff --git a/challenge-347/benjamin-andre/rust/ch-2.rs b/challenge-347/benjamin-andre/rust/ch-2.rs
new file mode 100755
index 0000000000..5e49813e77
--- /dev/null
+++ b/challenge-347/benjamin-andre/rust/ch-2.rs
@@ -0,0 +1,28 @@
+#!/bin/sh
+//usr/bin/env rustc --test $0 -o kachow && ./kachow --nocapture; rm -f kachow ; exit
+
+fn format_phone_number(phone: &str) -> String {
+    let digits: String = phone.chars().filter(|c| c.is_ascii_digit()).collect();
+    let mut result = Vec::new();
+    let mut i = 0;
+    while i < digits.len() {
+        let remaining = digits.len() - i;
+        let block_size = if remaining <= 4 && remaining != 3 {
+            2
+        } else {
+            3
+        };
+        result.push(&digits[i..i + block_size]);
+        i += block_size;
+    }
+    result.join("-")
+}
+
+#[test]
+fn example() {
+    assert_eq!(format_phone_number("1-23-45-6"), "123-456");
+    assert_eq!(format_phone_number("1234"), "12-34");
+    assert_eq!(format_phone_number("12 345-6789"), "123-456-789");
+    assert_eq!(format_phone_number("123 4567"), "123-45-67");
+    assert_eq!(format_phone_number("123 456-78"), "123-456-78");
+}