Text diff

use diff.qweruse diff_lines, diff_words from diff      // Quillo 0.6: only these

similar = "2"

// What changed between two versions of a page.////   quillo run diff.qwe      then open http://localhost:8080/changesuse "diff.qwer"let before = "Quillo is a language.\nIt runs on the server.\n"let after = "Quillo is a web language.\nIt runs on the server.\nAnd in the browser.\n"route GET /changes = diff_lines(before, after)route GET /patch = unified_diff(before, after, "page.md", "page.md", 3)route GET /alike = { ratio: diff_ratio(before, after) }

//! Differences between two texts: line by line, word by word, as a unified diff, and how alike they are.//! version: 1.0.0//!//! [dependencies]//! similar = "2"use serde_json::{json, Value};use similar::{ChangeTag, TextDiff};fn changes<'a, 'b>(d: &TextDiff<'a, 'a, 'b, str>) -> Vec<Value> {    d.iter_all_changes().map(|c| {        let op = match c.tag() { ChangeTag::Equal => "equal", ChangeTag::Insert => "insert", ChangeTag::Delete => "delete" };        json!({ "op": op, "text": c.value() })    }).collect()}/// The lines of `old` and `new` as changes: `[{ op: "equal" | "insert" | "delete", text }]`, ready to show in green and red.pub fn diff_lines(old: &str, new: &str) -> Vec<Value> {    changes(&TextDiff::from_lines(old, new))}/// The same, word by word (spaces kept as their own changes), for a sentence or a title.pub fn diff_words(old: &str, new: &str) -> Vec<Value> {    changes(&TextDiff::from_words(old, new))}/// A unified diff, as `git diff` writes one, with `context` lines around each change.pub fn unified_diff(old: &str, new: &str, old_name: &str, new_name: &str, context: i64) -> String {    TextDiff::from_lines(old, new).unified_diff().context_radius(context.max(0) as usize).header(old_name, new_name).to_string()}/// How alike two texts are, from 0 to 1, by their characters.pub fn diff_ratio(old: &str, new: &str) -> f64 {    TextDiff::from_chars(old, new).ratio() as f64}