Week 22 문제풀이

yujin-level0/Week22/배열_두_배_만들기.js

@@ -0,0 +1,10 @@
+function solution(numbers) {
+    var answer = [];
+    answer = numbers.map(x=>x*2);
+    return answer;
+}
+
+// 다른 풀이
+// function solution(numbers) {
+//     return numbers.reduce((a, b) => [...a, b * 2], []);
+// }

yujin-level0/Week22/중복된_숫자_개수.js

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+function solution(array, n) {
+  let newArr = [];
+  for (let i = 0; i < array.length; i++) {
+    if (array[i] === n) {
+      newArr.push(array[i]);
+    }
+  }
+  return newArr.length;
+}
+
+// 다른 풀이
+// function solution(array, n) {
+//   return array.filter(a => a === n).length;
+// }