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Refactor file handling to file.rs

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This commit is contained in:
Eryn Wells 2022-12-02 08:31:20 -08:00
parent 46b058d619
commit 4cd7570ba9
3 changed files with 30 additions and 8 deletions
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16
2022/aoc2022/src/day1.rs
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@ -1,10 +1,10 @@
use std::fs::File;
use std::io::BufRead;
use std::io::BufReader;
use std::io::Lines;
use std::io::Read;
use std::io::Result;
use crate::file::line_reader_for_file;
fn get_calorie_totals<R: Read + BufRead>(lines: Lines<R>) -> Vec<u32> {
let mut elves: Vec<u32> = Vec::new();
let mut current_calorie_count: u32 = 0;
@ -13,7 +13,6 @@ fn get_calorie_totals<R: Read + BufRead>(lines: Lines<R>) -> Vec<u32> {
let unwrapped_line = line.unwrap();
if unwrapped_line.is_empty() {
elves.push(current_calorie_count);
println!("Elf {}: {} calories", elves.len(), current_calorie_count);
current_calorie_count = 0;
continue;
}
@ -28,12 +27,15 @@ fn get_calorie_totals<R: Read + BufRead>(lines: Lines<R>) -> Vec<u32> {
}
pub fn main(input_filename: &String) -> Result<()> {
let file = File::open(input_filename)?;
let reader = BufReader::new(file);
let line_reader = line_reader_for_file(input_filename.as_str())
.expect(format!("Unable to create line reader for file: {}", input_filename).as_str());
let elves = get_calorie_totals(line_reader);
let elves = get_calorie_totals(reader.lines());
println!("Part 1: Elf with highest calorie count in knapsack: {}", elves[0]);
println!("Elf with highest calorie count in knapsack: {}", elves[0]);
let sum_of_top_three = &elves[0] + &elves[1] + &elves[2];
println!("Part 2: Elves with top 3 highest calorie counts in their knapsacks: {}, {}, {} = {}",
&elves[0], &elves[1], &elves[2], sum_of_top_three);
Ok(())
}