From 59b38baace107dcb4ff85befeebf52c5fa527617 Mon Sep 17 00:00:00 2001
From: Mariano Riefolo <rfmariano@protonmail.com>
Date: Wed, 18 Sep 2024 09:14:17 +0200
Subject: [PATCH] Wrote program for Day 55

---
 README.md                                     |  2 +-
 .../day55/Cargo.toml                          |  6 ++++
 .../day55/src/lib.rs                          | 10 +++++++
 .../day55/src/main.rs                         | 30 +++++++++++++++++++
 .../day55/tests/examples.rs                   | 23 ++++++++++++++
 5 files changed, 70 insertions(+), 1 deletion(-)
 create mode 100644 Week-08/Day-55_Filter_Repeating-Character-Strings/day55/Cargo.toml
 create mode 100644 Week-08/Day-55_Filter_Repeating-Character-Strings/day55/src/lib.rs
 create mode 100644 Week-08/Day-55_Filter_Repeating-Character-Strings/day55/src/main.rs
 create mode 100644 Week-08/Day-55_Filter_Repeating-Character-Strings/day55/tests/examples.rs

diff --git a/README.md b/README.md
index d9e8dab..751502f 100644
--- a/README.md
+++ b/README.md
@@ -101,7 +101,7 @@ We encourage you to share your progress and ask questions in the Discussions sec
 | Day #52       | [Switch On The Gravity](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-08/Day-52_Switch-On-The-Gravity)                 | :white_check_mark:      |
 | Day #53       | [Javelin Parabolic Throw](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-08/Day-53_Javelin-Parabolic-Throw)               | :white_check_mark:      |
 | Day #54       | [RGB To Hex Color Convertor](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-08/Day-54_RGB-To-Hex-Color-Converter)            | :white_check_mark:      |
-| Day #55       | [Filter Repeating Character Strings](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-08/Day-55_Filter_Repeating-Character-Strings)    | :white_large_square:      |
+| Day #55       | [Filter Repeating Character Strings](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-08/Day-55_Filter_Repeating-Character-Strings)    | :white_check_mark:      |
 | Day #56       | [Convert To Hex](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-08/Day-56_Convert-To-Hex)                        | :white_large_square:      |
 | Day #57       | [Magic Sigil Generator](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-09/Day-57_Magic-Sigil-Generator)                 | :white_large_square:      |
 | Day #58       | [Create A Dice Roller](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-09/Day-58_Create-A-Dice-Roller)                  | :white_large_square:      |
diff --git a/Week-08/Day-55_Filter_Repeating-Character-Strings/day55/Cargo.toml b/Week-08/Day-55_Filter_Repeating-Character-Strings/day55/Cargo.toml
new file mode 100644
index 0000000..35cb8bf
--- /dev/null
+++ b/Week-08/Day-55_Filter_Repeating-Character-Strings/day55/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "day55"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/Week-08/Day-55_Filter_Repeating-Character-Strings/day55/src/lib.rs b/Week-08/Day-55_Filter_Repeating-Character-Strings/day55/src/lib.rs
new file mode 100644
index 0000000..942a150
--- /dev/null
+++ b/Week-08/Day-55_Filter_Repeating-Character-Strings/day55/src/lib.rs
@@ -0,0 +1,10 @@
+pub fn identical_filter<'a>(strings: &'a [&str]) -> Vec<&'a str> {
+    strings
+        .iter()
+        .filter(|x| {
+            x.chars()
+                .all(|c| x.is_empty() || c == x.chars().next().unwrap())
+        })
+        .cloned()
+        .collect()
+}
diff --git a/Week-08/Day-55_Filter_Repeating-Character-Strings/day55/src/main.rs b/Week-08/Day-55_Filter_Repeating-Character-Strings/day55/src/main.rs
new file mode 100644
index 0000000..d049227
--- /dev/null
+++ b/Week-08/Day-55_Filter_Repeating-Character-Strings/day55/src/main.rs
@@ -0,0 +1,30 @@
+use std::process::exit;
+
+use day55::identical_filter;
+
+fn read_strings() -> Result<Vec<String>, Box<dyn std::error::Error>> {
+    let mut strings = Vec::new();
+    loop {
+        let mut input = String::new();
+        std::io::stdin().read_line(&mut input)?;
+        if input.trim().is_empty() {
+            break;
+        }
+        strings.push(input.trim().to_string());
+    }
+    Ok(strings)
+}
+
+fn main() {
+    println!("Enter a list of strings separated by newlines. Press Enter twice to finish.");
+    let strings = match read_strings() {
+        Ok(strings) => strings,
+        Err(err) => {
+            eprintln!("Error reading strings: {}", err);
+            exit(1);
+        }
+    };
+    let strings = strings.iter().map(|x| x.as_str()).collect::<Vec<&str>>();
+    let filtered = identical_filter(&strings);
+    println!("Filtered strings: {:?}", filtered);
+}
diff --git a/Week-08/Day-55_Filter_Repeating-Character-Strings/day55/tests/examples.rs b/Week-08/Day-55_Filter_Repeating-Character-Strings/day55/tests/examples.rs
new file mode 100644
index 0000000..5f102a4
--- /dev/null
+++ b/Week-08/Day-55_Filter_Repeating-Character-Strings/day55/tests/examples.rs
@@ -0,0 +1,23 @@
+#[cfg(test)]
+mod examples {
+    use day55::identical_filter;
+
+    #[test]
+    fn test_1() {
+        assert_eq!(
+            identical_filter(&["aaaaaa", "bc", "d", "eeee", "xyz"]),
+            ["aaaaaa", "d", "eeee"]
+        );
+    }
+    #[test]
+    fn test_2() {
+        assert_eq!(
+            identical_filter(&["88", "999", "22", "545", "133"]),
+            ["88", "999", "22"]
+        );
+    }
+    #[test]
+    fn test_3() {
+        assert!(identical_filter(&["xxxxo", "oxo", "xox", "ooxxoo", "oxo"]).is_empty());
+    }
+}