feat: implement array concatenation and word search functions

Author: bryanasb251

lesson_11/arrays_ts/src/lesson11.ts

@@ -3,13 +3,27 @@
  * https://leetcode.com/problems/concatenation-of-array
  */
 export function getConcatenation(nums: number[]): number[] {
-  return [];
-}
+  const answer: number[] = new Array(nums.length * 2);
+
+  for (let i = 0; i < nums.length; i++) {
+    answer[i] = nums[i];
+    answer[i + nums.length] = nums[i];
+  }
 
+  return answer;
+}
 /**
  * Provide the solution to LeetCode 2942 here:
  * https://leetcode.com/problems/find-words-containing-character/
  */
 export function findWordsContaining(words: string[], x: string): number[] {
-  return [];
+  const result: number[] = [];
+
+  for (let i = 0; i < words.length; i++) {
+    if (words[i].includes(x)) {
+      result.push(i);
+    }
+  }
+
+  return result;
 }