Create edit-distance.js

Author: varun93

edit-distance.js

@@ -0,0 +1,20 @@
+// insertion i,j-1
+// substitution i-1,j-1
+// delete i-1, j
+const backtrack = (i, j) => {
+  if (i < 0 || j < 0) {
+    return Math.max(i, j, 0);
+  }
+  if (A[i] === B[j]) {
+    return backtrack(i - 1, j - 1);
+  }
+  return (
+    1 +
+    Math.min(backtrack(i - 1, j - 1), backtrack(i, j - 1), backtrack(i - 1, j))
+  );
+};
+
+const A = "saturn";
+const B = "sat";
+
+console.log(backtrack(A.length - 1, B.length - 1));