Data update
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Ingy döt Net
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2347 changed files with 62432 additions and 16731 deletions
260
Task/Natural-sorting/Rust/natural-sorting.rs
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260
Task/Natural-sorting/Rust/natural-sorting.rs
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use regex::Regex;
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use std::cmp::Ordering;
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// Only covers ISO-8859-1 accented characters plus, for consistency, Ÿ
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const UC_ACCENTS: [&str; 8] = ["ÀÁÂÃÄÅ", "Ç", "ÈÉÊË", "ÌÍÎÏ", "Ñ", "ÒÓÔÕÖØ", "ÙÚÛÜ", "ÝŸ"];
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const LC_ACCENTS: [&str; 8] = ["àáâãäå", "ç", "èéêë", "ìíîï", "ñ", "òóôõöø", "ùúûü", "ýÿ"];
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const UC_UNACCENTS: [&str; 8] = ["A", "C", "E", "I", "N", "O", "U", "Y"];
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const LC_UNACCENTS: [&str; 8] = ["a", "c", "e", "i", "n", "o", "u", "y"];
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// Only the more common ligatures
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const UC_LIGATURES: [&str; 3] = ["Æ", "IJ", "Œ"];
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const LC_LIGATURES: [&str; 3] = ["æ", "ij", "œ"];
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const UC_SEPARATES: [&str; 3] = ["AE", "IJ", "OE"];
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const LC_SEPARATES: [&str; 3] = ["ae", "ij", "oe"];
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// Miscellaneous replacements
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const MISC_LETTERS: [&str; 3] = ["ß", "ſ", "ʒ"];
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const MISC_REPLACEMENTS: [&str; 3] = ["ss", "s", "s"];
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// Remove leading spaces
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fn left_trim(text: &str) -> String {
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text.trim_start().to_string()
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}
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// Replace multiple spaces with a single space
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fn replace_spaces(text: &str) -> String {
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let regex_expr = Regex::new(r" {2,}").unwrap();
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regex_expr.replace_all(text, " ").to_string()
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}
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// Replace whitespace with a single space
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fn replace_whitespace(text: &str) -> String {
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let regex_expr = Regex::new(r"\s+").unwrap();
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regex_expr.replace_all(text, " ").to_string()
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}
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// Display strings including whitespace as if the latter were literal characters
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fn to_display_string(text: &str) -> String {
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let whitespace_1 = ["\t", "\n", "\u{000b}", "\u{000c}", "\r"];
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let whitespace_2 = ["\\t", "\\n", "\\u000b", "\\u000c", "\\r"];
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let mut result = text.to_string();
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for i in 0..whitespace_1.len() {
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result = result.replace(whitespace_1[i], whitespace_2[i]);
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}
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result
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}
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// Transform the string into lower case
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fn to_lower_case(text: &str) -> String {
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text.to_lowercase()
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}
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// Pad each numeric character with leading zeros to a total length of 20
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fn zero_padding(text: &str) -> String {
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let digits = Regex::new(r"-?\d+").unwrap();
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let mut result = text.to_string();
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let mut extra_index = 0;
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for cap in digits.captures_iter(text) {
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let match_str = &cap[0];
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let start_pos = text.find(match_str).unwrap() + extra_index;
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let padding = "0".repeat(20 - match_str.len());
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result = format!("{}{}{}",
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&result[..start_pos],
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padding,
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&result[start_pos..]);
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extra_index += 20 - match_str.len();
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}
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result
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}
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fn remove_title(text: &str) -> String {
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let regex = Regex::new(r"^(The|An|A)\s+").unwrap();
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regex.replace(text, "").to_string()
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}
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// Replace accented letters with their unaccented equivalent
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fn replace_accents(text: &str) -> String {
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let mut result = String::new();
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let chars: Vec<char> = text.chars().collect();
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for i in 0..chars.len() {
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if (chars[i] as u32) < 128 {
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result.push(chars[i]);
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continue;
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}
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let length = result.len();
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let letter = chars[i].to_string();
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for j in 0..UC_ACCENTS.len() {
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if UC_ACCENTS[j].contains(&letter) {
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result.push_str(UC_UNACCENTS[j]);
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break;
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}
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}
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if length == result.len() {
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for j in 0..LC_ACCENTS.len() {
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if LC_ACCENTS[j].contains(&letter) {
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result.push_str(LC_UNACCENTS[j]);
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break;
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}
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}
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}
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}
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result
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}
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// Replace ligatures with separated letters
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fn replace_ligatures(text: &str) -> String {
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let mut result = text.to_string();
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for i in 0..UC_LIGATURES.len() {
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result = result.replace(UC_LIGATURES[i], UC_SEPARATES[i]);
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}
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for i in 0..LC_LIGATURES.len() {
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result = result.replace(LC_LIGATURES[i], LC_SEPARATES[i]);
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}
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result
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}
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// Replace miscellaneous letters with their equivalent replacements
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fn replace_characters(text: &str) -> String {
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let mut result = text.to_string();
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for i in 0..MISC_LETTERS.len() {
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result = result.replace(MISC_LETTERS[i], MISC_REPLACEMENTS[i]);
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}
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result
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}
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fn main() {
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println!("The 9 string lists, sorted 'naturally':");
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let mut s1 = vec![
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"ignore leading spaces: 2-2".to_string(),
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" ignore leading spaces: 2-1".to_string(),
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" ignore leading spaces: 2+0".to_string(),
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" ignore leading spaces: 2+1".to_string()
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];
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println!();
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s1.sort_by(|lhs, rhs| left_trim(lhs).cmp(&left_trim(rhs)));
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for s in &s1 {
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println!("{}", s);
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}
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let mut s2 = vec![
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"ignore m.a.s spaces: 2-2".to_string(),
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"ignore m.a.s spaces: 2-1".to_string(),
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"ignore m.a.s spaces: 2+0".to_string(),
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"ignore m.a.s spaces: 2+1".to_string()
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];
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println!();
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s2.sort_by(|lhs, rhs| replace_spaces(lhs).cmp(&replace_spaces(rhs)));
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for s in &s2 {
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println!("{}", s);
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}
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let mut s3 = vec![
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"Equiv. spaces: 3-3".to_string(),
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"Equiv.\rspaces: 3-2".to_string(),
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"Equiv.\u{000c}spaces: 3-1".to_string(),
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"Equiv.\u{000b}spaces: 3+0".to_string(),
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"Equiv.\nspaces: 3+1".to_string(),
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"Equiv.\tspaces: 3+2".to_string()
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];
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println!();
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s3.sort_by(|lhs, rhs| replace_whitespace(lhs).cmp(&replace_whitespace(rhs)));
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for s in &s3 {
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println!("{}", to_display_string(s));
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}
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let mut s4 = vec![
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"cASE INDEPENENT: 3-2".to_string(),
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"caSE INDEPENENT: 3-1".to_string(),
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"casE INDEPENENT: 3+0".to_string(),
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"case INDEPENENT: 3+1".to_string()
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];
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println!();
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s4.sort_by(|lhs, rhs| to_lower_case(lhs).cmp(&to_lower_case(rhs)));
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for s in &s4 {
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println!("{}", s);
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}
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let mut s5 = vec![
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"foo100bar99baz0.txt".to_string(),
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"foo100bar10baz0.txt".to_string(),
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"foo1000bar99baz10.txt".to_string(),
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"foo1000bar99baz9.txt".to_string()
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];
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println!();
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s5.sort_by(|lhs, rhs| zero_padding(lhs).cmp(&zero_padding(rhs)));
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for s in &s5 {
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println!("{}", s);
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}
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let mut s6 = vec![
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"The Wind in the Willows".to_string(),
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"The 40th step more".to_string(),
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"The 39 steps".to_string(),
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"Wanda".to_string()
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];
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println!();
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s6.sort_by(|lhs, rhs| remove_title(lhs).cmp(&remove_title(rhs)));
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for s in &s6 {
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println!("{}", s);
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}
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let mut s7 = vec![
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"Equiv. ý accents: 2-2".to_string(),
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"Equiv. Ý accents: 2-1".to_string(),
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"Equiv. y accents: 2+0".to_string(),
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"Equiv. Y accents: 2+1".to_string()
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];
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println!();
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s7.sort_by(|lhs, rhs| replace_accents(lhs).cmp(&replace_accents(rhs)));
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for s in &s7 {
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println!("{}", s);
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}
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let mut s8 = vec![
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"IJ ligatured ij".to_string(),
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"no ligature".to_string()
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];
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println!();
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s8.sort_by(|lhs, rhs| replace_ligatures(lhs).cmp(&replace_ligatures(rhs)));
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for s in &s8 {
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println!("{}", s);
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}
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let mut s9 = vec![
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"Start with an ʒ: 2-2".to_string(),
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"Start with an ſ: 2-1".to_string(),
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"Start with an ß: 2+0".to_string(),
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"Start with an s: 2+1".to_string()
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];
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println!();
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s9.sort_by(|lhs, rhs| replace_characters(lhs).cmp(&replace_characters(rhs)));
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for s in &s9 {
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println!("{}", s);
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}
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}
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