3 changed files with 298 additions and 0 deletions
@ -0,0 +1,231 @@ |
|||||||
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# This file is automatically @generated by Cargo. |
||||||
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# It is not intended for manual editing. |
||||||
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version = 3 |
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|
||||||
|
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||||||
|
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||||||
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|
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|
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"termcolor", |
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||||||
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"clap", |
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"errno-dragonfly", |
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] |
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"winapi", |
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] |
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|
[[package]] |
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name = "winapi-x86_64-pc-windows-gnu" |
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|
dependencies = [ |
||||||
|
"windows_aarch64_gnullvm", |
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|
"windows_aarch64_msvc", |
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"windows_i686_gnu", |
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"windows_i686_msvc", |
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"windows_x86_64_gnu", |
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"windows_x86_64_gnullvm", |
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"windows_x86_64_msvc", |
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] |
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|
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|
[[package]] |
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name = "windows_aarch64_gnullvm" |
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|
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|
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name = "windows_aarch64_msvc" |
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|
||||||
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[[package]] |
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|
name = "windows_i686_msvc" |
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|
|
||||||
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[[package]] |
||||||
|
name = "windows_x86_64_gnu" |
||||||
|
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||||||
|
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checksum = "bf7b1b21b5362cbc318f686150e5bcea75ecedc74dd157d874d754a2ca44b0ed" |
||||||
|
|
||||||
|
[[package]] |
||||||
|
name = "windows_x86_64_gnullvm" |
||||||
|
version = "0.42.0" |
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|
source = "registry+https://github.com/rust-lang/crates.io-index" |
||||||
|
checksum = "09d525d2ba30eeb3297665bd434a54297e4170c7f1a44cad4ef58095b4cd2028" |
||||||
|
|
||||||
|
[[package]] |
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|
name = "windows_x86_64_msvc" |
||||||
|
version = "0.42.0" |
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|
source = "registry+https://github.com/rust-lang/crates.io-index" |
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|
checksum = "f40009d85759725a34da6d89a94e63d7bdc50a862acf0dbc7c8e488f1edcb6f5" |
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@ -0,0 +1,9 @@ |
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|
[package] |
||||||
|
name = "day2" |
||||||
|
version = "0.1.0" |
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edition = "2021" |
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|
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|
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html |
||||||
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|
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[dependencies] |
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clap = "4.0.29" |
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@ -0,0 +1,58 @@ |
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use std::fs::File; |
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use std::io::BufRead; |
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use std::io::BufReader; |
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use std::io::Lines; |
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|
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use clap::Arg; |
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use clap::Command; |
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|
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struct Accumulator<B> { |
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lines: Lines<B>, |
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current: u32, |
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} |
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|
||||||
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trait Elvish<B> { |
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fn elf(self) -> Accumulator<B>; |
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} |
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|
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impl<B> Elvish<B> for Lines<B> { |
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fn elf(self) -> Accumulator<B> { |
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Accumulator { |
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lines: self, |
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current: 0, |
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} |
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} |
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} |
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|
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impl<B: BufRead> Iterator for Accumulator<B> { |
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type Item = u32; |
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|
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fn next(&mut self) -> Option<Self::Item> { |
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while let Some(Ok(line)) = self.lines.next() { |
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let line = line.trim(); |
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if line.is_empty() { |
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let result = self.current; |
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self.current = 0; |
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return Some(result); |
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} else { |
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self.current += line.parse::<u32>().unwrap(); |
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} |
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} |
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None |
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} |
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} |
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|
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fn main() { |
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let matches = Command::new("Day1").arg(Arg::new("filename")).get_matches(); |
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let filename = matches |
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.get_one::<String>("filename") |
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.expect("Need a filename"); |
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println!("Processing {}...", filename); |
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let file = File::open(filename).expect("Can't read file"); |
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let reader = BufReader::new(file); |
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let mut calories = reader.lines().elf().collect::<Vec<u32>>(); |
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calories.sort_by(|a, b| b.cmp(a)); |
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println!("Sum: {:?}", calories.iter().take(3).sum::<u32>()) |
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} |
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Loading…
Reference in new issue