first imml

src/desktop.rs

@@ -79,6 +79,49 @@ pub fn app_id_or_fallback_matches(app_id: &str, entry: &DesktopEntryData) -> boo
         || app_id.to_lowercase() == entry.name.to_lowercase()
 }
 
+
+
+
+pub fn lcs(s1: &str, s2: &str) -> usize {
+
+    let mut mat: Vec<Vec<i32>> = vec![vec![0; s1.len() + 1]; s2.len() + 1];
+
+    for (i, u) in s1.char_indices() {
+        for (j, v) in s2.char_indices() {
+            if i == 0 || j == 0 {
+                mat[i][j] = 0;
+            } else if u == v {
+                mat[i][j] = mat[i - 1][j - 1] + 1;
+            } else {
+                mat[i][j] = max(mat[i - 1][j], mat[i][j - 1]);
+            }
+        }
+    }
+
+    let mut s1_iter = s1.char_indices().rev().peekable();
+    let mut s2_iter = s1.char_indices().rev().peekable();
+
+    let mut res = 0;
+
+    dbg!(&mat);
+    
+    while let (Some((i, u)), Some((j, v))) = (s1_iter.peek(), s2_iter.peek()) {
+        if u == v {
+            res += 1;
+            s1_iter.next();
+            s2_iter.next();
+        } else if mat[i - 1][*j] > mat[*i][j - 1] {
+            s1_iter.next();
+        } else {
+            s2_iter.next();
+        }
+    }
+
+    println!("res = {res}");
+    res
+}
+
+
 /// lower is better
 fn match_entry(id: &str, de: &DesktopEntry) -> f32 {