1 files changed, 34 insertions, 0 deletions
diff --git a/src/utils/levenshtein_distance.rs b/src/utils/levenshtein_distance.rs
new file mode 100644
index 0000000..6bdb7e7
--- /dev/null
+++ b/src/utils/levenshtein_distance.rs
@@ -0,0 +1,34 @@
+use std::cmp::min;
+
+pub fn levenshtein_distance(a: &str, b: &str) -> usize {
+    let a_chars: Vec<char> = a.chars().collect();
+    let b_chars: Vec<char> = b.chars().collect();
+    let a_len = a_chars.len();
+    let b_len = b_chars.len();
+
+    if a_len == 0 {
+        return b_len;
+    }
+    if b_len == 0 {
+        return a_len;
+    }
+
+    let mut dp = vec![vec![0; b_len + 1]; a_len + 1];
+
+    for (i, row) in dp.iter_mut().enumerate() {
+        row[0] = i;
+    }
+
+    for (j, cell) in dp[0].iter_mut().enumerate() {
+        *cell = j;
+    }
+
+    for (i, a_char) in a_chars.iter().enumerate() {
+        for (j, b_char) in b_chars.iter().enumerate() {
+            let cost = if a_char == b_char { 0 } else { 1 };
+            dp[i + 1][j + 1] = min(dp[i][j + 1] + 1, min(dp[i + 1][j] + 1, dp[i][j] + cost));
+        }
+    }
+
+    dp[a_len][b_len]
+}