Merge pull request #68 from front-studium/sujin

`week11`, `week12`, `week13`, `week14` 문제 풀었습니다

Author: pappaya109

sujin-level0/15. 배열의 평균값.js

@@ -0,0 +1,4 @@
+function solution(numbers) {
+  const sum = numbers.reduce((acc, cur) => acc + cur);
+  return sum / numbers.length;
+}

sujin-level0/16. 배열 뒤집기.js

@@ -0,0 +1,7 @@
+function solution(num_list) {
+  const answer = [];
+  for (let i = num_list.length - 1; i >= 0; i--) {
+    answer.push(num_list[i]);
+  }
+  return answer;
+}

sujin-level0/17.제곱수 판별하기.js

@@ -0,0 +1,4 @@
+function solution(n) {
+  const answer = Math.sqrt(n);
+  return Number.isInteger(answer) ? 1 : 2;
+}

sujin-level0/18.짝수 홀수 개수.js

@@ -0,0 +1,7 @@
+function solution(num_list) {
+  const answer = [0, 0];
+  for (let i = 0; i < num_list.length; i++) {
+    num_list[i] % 2 === 0 ? (answer[0] += 1) : (answer[1] += 1);
+  }
+  return answer;
+}

sujin-level0/19.특정문자 제거하기.js

@@ -0,0 +1,7 @@
+function solution(my_string, letter) {
+  let answer = "";
+  for (const e of my_string) {
+    e !== letter ? (answer += e) : answer;
+  }
+  return answer;
+}

sujin-level0/20. 뒤집힌 문자열.js

@@ -0,0 +1,7 @@
+function solution(my_string) {
+  let answer = "";
+  for (let i = my_string.length - 1; i >= 0; i--) {
+    answer += my_string[i];
+  }
+  return answer;
+}

sujin-level0/21.문자 반복 출력하기.js

@@ -0,0 +1,7 @@
+function solution(my_string, n) {
+  let answer = "";
+  for (let i = 0; i < my_string.length; i++) {
+    [...new Array(n)].forEach((e) => (answer += my_string[i]));
+  }
+  return answer;
+}

sujin-level0/22.편지.js

@@ -0,0 +1,3 @@
+function solution(message) {
+  return message.length * 2;
+}