commit a4f69cc2c251c9498537e15ff1903d52be5ee523
Author: Patrick MARIE <pm@mkz.me>
Date:   Sun Jan 17 17:20:54 2021 +0100

    Initial commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..96ef6c0
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/target
+Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
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index 0000000..aa02585
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "mkz_aoc"
+version = "0.1.0"
+authors = ["Patrick MARIE <pm@mkz.me>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/src/file.rs b/src/file.rs
new file mode 100644
index 0000000..8056f6c
--- /dev/null
+++ b/src/file.rs
@@ -0,0 +1,25 @@
+use std::fs;
+
+pub fn read_to_lines(_filename: &str) -> Result<Vec<String>, String> {
+    let _contents = fs::read_to_string(_filename);
+    if let Err(v) = _contents {
+        return Err(format!("Could not read file: {}", v));
+    }
+
+    let lines = _contents.unwrap().lines().map(|x| x.to_string()).collect::<Vec<String>>();
+
+    Ok(lines)
+}
+
+pub fn read_to_string(_filename: &str) -> Result<String, String> {
+    let _lines = read_to_lines(_filename);
+
+    match _lines {
+        Ok(lines) => if lines.len() >= 1 {
+            Ok(lines[0].clone())
+        } else {
+            Err(String::from("Missing content"))
+        },
+        Err(v) => Err(v)
+    }
+}
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diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..99e3888
--- /dev/null
+++ b/src/lib.rs
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+pub mod file;
+pub mod parse;
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diff --git a/src/parse.rs b/src/parse.rs
new file mode 100644
index 0000000..f5648fb
--- /dev/null
+++ b/src/parse.rs
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+pub fn string_to_usize_vec(input: String) -> Vec<usize> {
+    input.chars().map(|x| x.to_digit(10).unwrap() as usize).collect()
+}
+
+#[test]
+fn test_string_to_usize_vec() {
+    assert_eq!(vec![1, 2, 3, 4], string_to_usize_vec(String::from("1234")));
+}
\ No newline at end of file