Solve collection tasks
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3 changed files with 315 additions and 0 deletions
140
collections/Cargo.lock
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140
collections/Cargo.lock
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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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[[package]]
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name = "byteorder"
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version = "1.5.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
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[[package]]
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name = "cfg-if"
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version = "1.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
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[[package]]
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name = "collections"
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version = "0.1.0"
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dependencies = [
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"rand",
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]
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[[package]]
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name = "getrandom"
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version = "0.2.15"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
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dependencies = [
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"cfg-if",
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"libc",
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"wasi",
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]
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[[package]]
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name = "libc"
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version = "0.2.169"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "b5aba8db14291edd000dfcc4d620c7ebfb122c613afb886ca8803fa4e128a20a"
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[[package]]
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name = "ppv-lite86"
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version = "0.2.20"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "77957b295656769bb8ad2b6a6b09d897d94f05c41b069aede1fcdaa675eaea04"
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dependencies = [
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"zerocopy",
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]
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[[package]]
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name = "proc-macro2"
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version = "1.0.93"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "60946a68e5f9d28b0dc1c21bb8a97ee7d018a8b322fa57838ba31cc878e22d99"
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dependencies = [
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"unicode-ident",
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]
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[[package]]
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name = "quote"
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version = "1.0.38"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "0e4dccaaaf89514f546c693ddc140f729f958c247918a13380cccc6078391acc"
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dependencies = [
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"proc-macro2",
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]
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[[package]]
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name = "rand"
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version = "0.8.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
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dependencies = [
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"libc",
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"rand_chacha",
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"rand_core",
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]
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[[package]]
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name = "rand_chacha"
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version = "0.3.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
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dependencies = [
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"ppv-lite86",
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"rand_core",
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]
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[[package]]
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name = "rand_core"
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version = "0.6.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
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dependencies = [
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"getrandom",
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]
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[[package]]
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name = "syn"
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version = "2.0.96"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
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dependencies = [
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"proc-macro2",
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"quote",
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"unicode-ident",
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]
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[[package]]
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name = "unicode-ident"
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version = "1.0.15"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "11cd88e12b17c6494200a9c1b683a04fcac9573ed74cd1b62aeb2727c5592243"
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[[package]]
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name = "wasi"
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version = "0.11.0+wasi-snapshot-preview1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
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[[package]]
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name = "zerocopy"
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version = "0.7.35"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "1b9b4fd18abc82b8136838da5d50bae7bdea537c574d8dc1a34ed098d6c166f0"
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dependencies = [
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"byteorder",
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"zerocopy-derive",
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]
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[[package]]
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name = "zerocopy-derive"
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version = "0.7.35"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
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dependencies = [
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"proc-macro2",
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"quote",
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"syn",
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]
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7
collections/Cargo.toml
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7
collections/Cargo.toml
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@ -0,0 +1,7 @@
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[package]
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name = "collections"
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version = "0.1.0"
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edition = "2021"
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[dependencies]
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rand = "0.8.5"
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168
collections/src/main.rs
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168
collections/src/main.rs
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use std::{collections::HashMap, io::{self, Write}};
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use rand::Rng;
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fn main() {
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// Task 1: Statistics
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let median: f32;
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let mode;
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let mut rng = rand::thread_rng();
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let mut values = Vec::new();
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println!("values:");
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for _ in 1..=rng.gen_range(1..10) {
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let value = rng.gen_range(1..5);
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println!("{value}");
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values.push(value);
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}
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median = if values.len() == 1 {
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values[0] as f32
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} else {
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match values.len() % 2 {
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0 => ((values[values.len() / 2] + values[(values.len() / 2) - 1]) as f32) / 2.0,
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_ => values[values.len() / 2] as f32
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}
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};
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let mut occurrences = HashMap::new();
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for number in &values {
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*occurrences.entry(*number).or_insert(0) += 1;
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}
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mode = *occurrences.iter().max_by_key(|e| e.1).unwrap().0;
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println!("number of elements: {}", values.len());
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println!("median: {median}");
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println!("mode: {mode}");
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// Task 2:
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let words = ["first", "apple"];
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for word in words {
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let mut result;
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if ['a','e', 'i', 'o', 'u', 'ä', 'ö', 'ü'].contains(&word.to_lowercase().chars().next().unwrap()) {
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result = String::from(word);
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result.push_str("-h");
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} else {
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result = String::from(&word[1..]);
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result.push('-');
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result.push_str(&word[0..=0]);
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}
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result.push_str("ay");
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println!("input: {word}");
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println!("pig latin: {result}");
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}
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println!();
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// Task 3:
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let mut exit = false;
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let mut employees: HashMap<String, Vec<String>> = HashMap::new();
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println!("Welcome to the human resources management console!");
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println!("Please enter a command or 'help' for the help message.");
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while !exit {
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let mut input = String::new();
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print!("> ");
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io::stdout().flush().expect("An error occurred");
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io::stdin().read_line(&mut input).expect("An error occurred");
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match input.to_lowercase().trim() {
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"q" | "quit" => exit = true,
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"h" | "help" => {
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println!("This program allows you to manage employees and their corresponding department.");
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println!();
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println!("Following commands are available:");
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println!("p, print [department]: prints all employees or the employees of the specified department");
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println!();
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println!("a, add {{employee}} to {{department}}: adds the specified employee to the specified department");
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println!();
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println!("r, remove {{employee}} from {{department}}: adds the specified employee to the specified department");
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println!();
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println!("q, quit: closes the program");
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println!();
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println!("h, help: prints this help message");
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println!();
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}
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_ => {
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let arguments = input.split_whitespace();
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if arguments.clone().count() > 0 {
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let command = arguments.clone().next().expect("An error occurred");
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match command.to_lowercase().as_str() {
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"a" | "add" => {
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match input[command.len()..].split(" to ").collect::<Vec<&str>>().as_slice() {
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[employee, department] => {
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employees.entry(department.trim().to_string()).or_insert(Vec::new()).push(employee.trim().to_string());
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},
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_ => {
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println!("The syntax of the command \"{input}\" is incorrect!");
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println!("Please try again");
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}
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}
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}
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"r" | "remove" => {
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match input[command.len()..].split(" from ").collect::<Vec<&str>>().as_slice() {
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[employee, department] => {
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employees.entry(department.trim().to_string()).and_modify(|e| e.retain(|e| *e != employee.trim()));
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employees.retain(|_, e| !e.is_empty());
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},
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_ => {
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println!("The syntax of the command \"{input}\" is incorrect!");
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println!("Please try again");
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}
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}
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}
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"p" | "print" => {
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if input.trim().len() > command.len() {
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let department = input[command.len()..].trim();
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match employees.get(department) {
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Some(employees) => {
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println!("Employees in {department}:");
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let mut employees: Vec<_> = employees.iter().collect();
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employees.sort();
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for employee in employees {
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println!(" {employee}");
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}
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},
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None => println!("The department {department} does not exist!")
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}
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} else {
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if employees.len() > 0 {
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println!("All employees:");
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println!();
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let mut employees: Vec<_> = employees.iter().collect();
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employees.sort_by_key(|e| e.0);
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for entry in employees {
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let department = entry.0;
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let mut employees: Vec<_> = entry.1.iter().collect();
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employees.sort();
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println!(" {department}:");
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for employee in employees {
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println!(" {employee}");
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}
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}
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} else {
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println!("No employees or departments have been added so far.");
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}
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}
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}
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_ => {
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println!("The specified command \"{}\" is invalid!", input.trim());
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}
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}
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}
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}
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}
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}
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}
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