From 5070cd414f9be1b63fba61e7b2be7b47b510f92e Mon Sep 17 00:00:00 2001
From: Thomas Ruoff <truoff@brandwatch.com>
Date: Thu, 30 Dec 2021 00:27:30 +0100
Subject: [PATCH] day01 in rust

---
 .gitignore               |  2 +-
 day01/Cargo.lock         |  7 +++++++
 day01/Cargo.toml         |  8 ++++++++
 day01/{ => data}/input   |  0
 day01/{ => js}/index.mjs | 16 ++++++++++-----
 day01/src/main.rs        | 44 ++++++++++++++++++++++++++++++++++++++++
 6 files changed, 71 insertions(+), 6 deletions(-)
 create mode 100644 day01/Cargo.lock
 create mode 100644 day01/Cargo.toml
 rename day01/{ => data}/input (100%)
 rename day01/{ => js}/index.mjs (69%)
 create mode 100644 day01/src/main.rs

diff --git a/.gitignore b/.gitignore
index ea8c4bf..eb5a316 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1 @@
-/target
+target
diff --git a/day01/Cargo.lock b/day01/Cargo.lock
new file mode 100644
index 0000000..683c0b9
--- /dev/null
+++ b/day01/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day01"
+version = "0.1.0"
diff --git a/day01/Cargo.toml b/day01/Cargo.toml
new file mode 100644
index 0000000..5a61072
--- /dev/null
+++ b/day01/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day01"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/day01/input b/day01/data/input
similarity index 100%
rename from day01/input
rename to day01/data/input
diff --git a/day01/index.mjs b/day01/js/index.mjs
similarity index 69%
rename from day01/index.mjs
rename to day01/js/index.mjs
index 0053038..0030cf5 100644
--- a/day01/index.mjs
+++ b/day01/js/index.mjs
@@ -1,18 +1,24 @@
 import * as readline from 'node:readline';
 import * as fs from 'node:fs';
 
+
+const data = [];
 const rl = readline.createInterface({ 
     input: fs.createReadStream('./input') 
 });
 
-let last = null;
-let counter = 0;
-
 for await (const line of rl) {
-    const v = parseInt(line, 10);
+    data.push(parseInt(line, 10));
+}
+
+
+let last = null;
+let part1 = 0;
+
+for (const v in data) {
     if (last !== null && v > last) counter++;
     last = v;    
 }
 
-console.log(counter);
+console.log('part1', part1);
 
diff --git a/day01/src/main.rs b/day01/src/main.rs
new file mode 100644
index 0000000..9bcb64d
--- /dev/null
+++ b/day01/src/main.rs
@@ -0,0 +1,44 @@
+use std::fs;
+
+fn main() {
+    let input = fs::read_to_string("./data/input").expect("Unable to read file");
+    let data = parse(&input);
+
+    println!("Task 1: {:?}", count_inc(1, &data));
+    println!("Task 2: {:?}", count_inc(3, &data));
+}
+
+fn count_inc(window_count: usize, data: &Vec<i32>) -> i32 {
+    let mut last: i32 = i32::MAX;
+    let mut counter = 0;
+    for (pos, _) in data.iter().enumerate() {
+        let e = get_last_n(pos, window_count, data)
+            .into_iter()
+            .reduce(|accum, item| accum + item)
+            .unwrap_or(0);
+
+        if last < e {
+            counter += 1;
+        }
+
+        last = e;
+    }
+    return counter;
+}
+
+fn get_last_n(index: usize, n: usize, data: &Vec<i32>) -> Vec<i32> {
+    let data_len = data.len();
+    if index > data_len || index + n > data_len {
+        return vec![];
+    }
+    return data.get(index..(n + index)).unwrap().to_vec();
+}
+
+fn parse(data: &String) -> Vec<i32> {
+    let mut result: Vec<i32> = vec![];
+    for line in data.lines() {
+        result.push(line.parse::<i32>().unwrap());
+    }
+
+    return result;
+}