From c80ffbb1a8ede80ca4f52a928e84718abebac052 Mon Sep 17 00:00:00 2001
From: Jeon Eonseok <jseokeon@gmail.com>
Date: Sat, 2 Dec 2023 07:31:56 +0900
Subject: [PATCH 1/7] =?UTF-8?q?8=EC=A3=BC=EC=B0=A8=20=EC=B2=AB=20=EB=B2=88?=
 =?UTF-8?q?=EC=A7=B8=20=EB=AC=B8=EC=A0=9C?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 "\354\226\270\354\204\235/week8/1.js" | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 "\354\226\270\354\204\235/week8/1.js"

diff --git "a/\354\226\270\354\204\235/week8/1.js" "b/\354\226\270\354\204\235/week8/1.js"
new file mode 100644
index 0000000..499b826
--- /dev/null
+++ "b/\354\226\270\354\204\235/week8/1.js"
@@ -0,0 +1,15 @@
+// https://school.programmers.co.kr/learn/courses/30/lessons/12935
+// 제일 작은 수 제거하기
+
+function solution(arr) {
+  const minIdx = arr.indexOf(Math.min(...arr));
+  console.log(minIdx);
+  
+  arr.splice(minIdx, 1)
+
+  if (arr.length === 0) {
+    return [-1]
+  }
+
+  return arr;
+}

From c805f5780f9debb6f523724b58322e73ae25391e Mon Sep 17 00:00:00 2001
From: Jeon Eonseok <jseokeon@gmail.com>
Date: Sat, 2 Dec 2023 07:58:33 +0900
Subject: [PATCH 2/7] =?UTF-8?q?8=EC=A3=BC=EC=B0=A8=20=EB=91=90=20=EB=B2=88?=
 =?UTF-8?q?=EC=A7=B8=20=EB=AC=B8=EC=A0=9C?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 "\354\226\270\354\204\235/week8/2.js" | 38 +++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 "\354\226\270\354\204\235/week8/2.js"

diff --git "a/\354\226\270\354\204\235/week8/2.js" "b/\354\226\270\354\204\235/week8/2.js"
new file mode 100644
index 0000000..3d1e7e8
--- /dev/null
+++ "b/\354\226\270\354\204\235/week8/2.js"
@@ -0,0 +1,38 @@
+// https://school.programmers.co.kr/learn/courses/30/lessons/12903
+// 가운데 글자 가져오기
+
+function solution(s) {
+  const strLen = s.length;
+  
+  const midIdx = Math.floor(strLen / 2);
+
+  if (strLen % 2 !== 0) return s[midIdx];
+  if (strLen % 2 === 0) return s[midIdx - 1] + s[midIdx];
+
+  return midIdx;
+}
+
+// 다른 사람 풀이
+
+function solution2(s) {
+    return s.substr(Math.ceil(s.length / 2) - 1, s.length % 2 === 0 ? 2 : 1);
+}
+
+/** 
+ * substr()
+ * 사용을 권장하진 않는다고 한다.
+ * 
+ * substr(start)
+ * substr(start, length)
+ * 
+ * return vale
+ * 해당 부분의 새로운 string
+ * 
+ * const str = 'Mozilla';
+ * 
+ * console.log(str.substr(1, 2));
+ * // Expected output: "oz"
+ * 
+ * console.log(str.substr(2));
+ * // Expected output: "zilla"
+ */
\ No newline at end of file

From 0d8827a5a64efaa728499729955a21c48ca4a27a Mon Sep 17 00:00:00 2001
From: Jeon Eonseok <jseokeon@gmail.com>
Date: Sat, 2 Dec 2023 08:04:18 +0900
Subject: [PATCH 3/7] =?UTF-8?q?8=EC=A3=BC=EC=B0=A8=20=EC=84=B8=20=EB=B2=88?=
 =?UTF-8?q?=EC=A7=B8=20=EB=AC=B8=EC=A0=9C?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 "\354\226\270\354\204\235/week8/3.js" | 28 +++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 "\354\226\270\354\204\235/week8/3.js"

diff --git "a/\354\226\270\354\204\235/week8/3.js" "b/\354\226\270\354\204\235/week8/3.js"
new file mode 100644
index 0000000..e032cad
--- /dev/null
+++ "b/\354\226\270\354\204\235/week8/3.js"
@@ -0,0 +1,28 @@
+// https://school.programmers.co.kr/learn/courses/30/lessons/12917
+// 문자열 내림차순으로 배치하기
+
+function solution(s) {
+  return (Array(...s).sort().reverse().join(''));
+}
+
+// 다른 풀이
+function solution2(s) {
+  return s
+    .split("")
+    .sort()
+    .reverse()
+    .join("");
+}
+
+/**
+ * obj.sort().reverse();
+ * vs
+ * obj.sort((a, b) => (a > b ? -1 : 1))
+ * vs
+ * obj.sort((a, b) => b.localeCompare(a))
+ * 
+ * winner is obj.sort().reverse()
+ * 
+ * ref
+ * https://stackoverflow.com/questions/52030110/sorting-strings-in-descending-order-in-javascript-most-efficiently
+ */
\ No newline at end of file

From a26eaffb0285ec94b501cbed6e915a9fd6660fce Mon Sep 17 00:00:00 2001
From: Jeon Eonseok <jseokeon@gmail.com>
Date: Fri, 8 Dec 2023 11:55:36 +0900
Subject: [PATCH 4/7] =?UTF-8?q?9=EC=A3=BC=EC=B0=A8=20=EC=B2=AB=EB=B2=88?=
 =?UTF-8?q?=EC=A7=B8=20=EB=AC=B8=EC=A0=9C?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 "\354\226\270\354\204\235/week9/1.js" | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 "\354\226\270\354\204\235/week9/1.js"

diff --git "a/\354\226\270\354\204\235/week9/1.js" "b/\354\226\270\354\204\235/week9/1.js"
new file mode 100644
index 0000000..fb7fe4f
--- /dev/null
+++ "b/\354\226\270\354\204\235/week9/1.js"
@@ -0,0 +1,17 @@
+// https://school.programmers.co.kr/learn/courses/30/lessons/12948
+// 핸드폰 번호 가리기
+
+function solution(phone_number) {
+  return '*'.repeat(phone_number.length - 4) + phone_number.slice(phone_number.length - 4);
+}
+
+// 다른 사람 풀이1
+function hide_numbers(s){
+  return s.replace(/\d(?=\d{4})/g, "*");
+}
+
+// 다른 사람 풀이2
+function hide_numbers(s){
+  var result = "*".repeat(s.length - 4) + s.slice(-4);
+  return result;
+}
\ No newline at end of file

From d11e14bbe40eab7ae7cc39632d8844b326cc6732 Mon Sep 17 00:00:00 2001
From: Jeon Eonseok <jseokeon@gmail.com>
Date: Fri, 8 Dec 2023 17:08:23 +0900
Subject: [PATCH 5/7] =?UTF-8?q?9=EC=A3=BC=EC=B0=A8=20=EB=91=90=EB=B2=88?=
 =?UTF-8?q?=EC=A7=B8=20=EB=AC=B8=EC=A0=9C?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 "\354\226\270\354\204\235/week9/2.js" | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 "\354\226\270\354\204\235/week9/2.js"

diff --git "a/\354\226\270\354\204\235/week9/2.js" "b/\354\226\270\354\204\235/week9/2.js"
new file mode 100644
index 0000000..a17d649
--- /dev/null
+++ "b/\354\226\270\354\204\235/week9/2.js"
@@ -0,0 +1,24 @@
+// https://school.programmers.co.kr/learn/courses/30/lessons/12912
+// 두 정수 사이의 합
+
+function solution(a, b) {
+  let sum = 0;
+  if (a < b) {
+    for (let i = a; i <= b; i++) {
+      sum += i;
+    }
+  } else {
+    for (let i = b; i <= a; i++) {
+      sum += i;
+    }
+  }
+
+  return sum;
+}
+
+// 다른 사람 풀이
+function adder(a, b, s = 0){
+  for (var i = Math.min(a, b); i <= Math.max(a, b); i++) s += i;
+
+  return s;
+}

From 568d8c029203c23436ec6e424bf700cdc6634b18 Mon Sep 17 00:00:00 2001
From: Jeon Eonseok <jseokeon@gmail.com>
Date: Sat, 9 Dec 2023 02:04:48 +0900
Subject: [PATCH 6/7] =?UTF-8?q?9=EC=A3=BC=EC=B0=A8=20=EC=84=B8=EB=B2=88?=
 =?UTF-8?q?=EC=A7=B8=20=EB=AC=B8=EC=A0=9C?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 "\354\226\270\354\204\235/week9/3.js" | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 "\354\226\270\354\204\235/week9/3.js"

diff --git "a/\354\226\270\354\204\235/week9/3.js" "b/\354\226\270\354\204\235/week9/3.js"
new file mode 100644
index 0000000..c7eb5c9
--- /dev/null
+++ "b/\354\226\270\354\204\235/week9/3.js"
@@ -0,0 +1,12 @@
+// https://school.programmers.co.kr/learn/courses/30/lessons/86051
+// 없는 숫자 더하기
+
+function solution(numbers) {
+  let answer = 0;
+
+  for (let i = 0; i < 10; i++) {
+    if (!numbers.includes(i)) answer += i;
+  }
+
+  return answer;
+}

From bc5e63f371eb9ac54e4ba8309e1b475fa9859816 Mon Sep 17 00:00:00 2001
From: Jeon Eonseok <jseokeon@gmail.com>
Date: Sun, 10 Dec 2023 12:55:16 +0900
Subject: [PATCH 7/7] =?UTF-8?q?9=EC=A3=BC=EC=B0=A8=204=EB=B2=88=EC=A7=B8?=
 =?UTF-8?q?=20=EB=AC=B8=EC=A0=9C?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 "\354\226\270\354\204\235/week9/4.js" | 8 ++++++++
 1 file changed, 8 insertions(+)
 create mode 100644 "\354\226\270\354\204\235/week9/4.js"

diff --git "a/\354\226\270\354\204\235/week9/4.js" "b/\354\226\270\354\204\235/week9/4.js"
new file mode 100644
index 0000000..9038446
--- /dev/null
+++ "b/\354\226\270\354\204\235/week9/4.js"
@@ -0,0 +1,8 @@
+// https://school.programmers.co.kr/learn/courses/30/lessons/12931
+// 자릿수 더하기
+
+function solution(n) {
+    let answer = String(n).split('').reduce((acc, cur) => +acc + +cur, 0);
+
+    return answer;
+}