Create 72-edit-distance.js

Author: everthis

72-edit-distance.js

@@ -0,0 +1,25 @@
+/**
+ * @param {string} word1
+ * @param {string} word2
+ * @return {number}
+ */
+const minDistance = function(word1, word2) {
+    let m = word1.length, n = word2.length;
+    const dp = Array.from({length: m + 1}, ()=> new Array(n+ 1).fill(0))
+    for (let i = 1; i <= m; i++) {
+      dp[i][0] = i;
+    }
+    for (let j = 1; j <= n; j++) {
+      dp[0][j] = j;
+    }
+    for (let i = 1; i <= m; i++) {
+      for (let j = 1; j <= n; j++) {
+        if (word1[i - 1] === word2[j - 1]) {
+          dp[i][j] = dp[i - 1][j - 1];
+        } else {
+          dp[i][j] = Math.min(dp[i - 1][j - 1], Math.min(dp[i][j - 1], dp[i - 1][j])) + 1;
+        }
+      }
+    }
+    return dp[m][n];
+};