misc cleanup, minor readability fix, cargo clippy

src/day01.rs

@@ -3,7 +3,7 @@
 use crate::utils;
 use anyhow::{anyhow, Result};
 
-fn day01_part1(data: &[i64]) -> Result<i64> {
+fn part1(data: &[i64]) -> Result<i64> {
     for c in utils::combinations(2, data.len()) {
         if data[c[0]] + data[c[1]] == 2020 {
             return Ok(data[c[0]] * data[c[1]]);
@@ -12,7 +12,7 @@ fn day01_part1(data: &[i64]) -> Result<i64> {
     Err(anyhow!("no result found"))
 }
 
-fn day01_part2(data: &[i64]) -> Result<i64> {
+fn part2(data: &[i64]) -> Result<i64> {
     for c in utils::combinations(3, data.len()) {
         if data[c[0]] + data[c[1]] + data[c[2]] == 2020 {
             return Ok(data[c[0]] * data[c[1]] * data[c[2]]);
@@ -25,10 +25,10 @@ pub fn run() -> Result<(i64, i64)> {
     let data = utils::read_i64s("data/input-01.txt")?;
     let answers = utils::read_i64s("data/output-01.txt")?;
 
-    let p1 = day01_part1(&data)?;
+    let p1 = part1(&data)?;
     assert_eq!(p1, answers[0]);
 
-    let p2 = day01_part2(&data)?;
+    let p2 = part2(&data)?;
     assert_eq!(p2, answers[1]);
 
     Ok((p1, p2))