Add solution to 1768.

ovidiubute · ovidiubute · commit b008602be5db · 2023-12-27T16:46:53.000+02:00
diff --git a/solutions/1768.merge-strings-alternately.js b/solutions/1768.merge-strings-alternately.js
@@ -0,0 +1,42 @@
+/**
+ * @param {string} word1
+ * @param {string} word2
+ * @return {string}
+ */
+var mergeAlternately = function (word1, word2) {
+  const L1 = word1.length;
+  const L2 = word2.length;
+
+  if (L1 === 0 && L2 === 0) {
+    return word1;
+  } else {
+    if (L1 === 0) {
+      return word1;
+    } else if (L2 === 0) {
+      return word2;
+    }
+  }
+
+  let out = new Array(L1 + L2);
+  let i = 0;
+  let upper = Math.min(L1, L2);
+
+  while (i < upper) {
+    out.push(word1[i]);
+    out.push(word2[i]);
+
+    i++;
+  }
+
+  if (L1 === L2) {
+    return out.join("");
+  }
+
+  if (i === L1) {
+    out.push(word2.slice(i));
+  } else {
+    out.push(word1.slice(i));
+  }
+
+  return out.join("");
+};
