From 23e1afb245f66ec91adf29ffd2b035110d5cbd67 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=AE=AE=E6=9C=AC=E6=A2=A8=E6=B2=99?=
 <r_miyamoto@chitech.co.jp>
Date: Wed, 14 Jul 2021 19:33:31 +0900
Subject: [PATCH 1/2] =?UTF-8?q?=E3=83=A9=E3=83=B3=E3=82=AD=E3=83=B3?=
 =?UTF-8?q?=E3=82=B0=E3=81=AE=E5=AE=9F=E8=A3=85=E5=AE=8C=E4=BA=86?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app.js | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/app.js b/app.js
index ad9a93a7..f1c09a12 100644
--- a/app.js
+++ b/app.js
@@ -1 +1,49 @@
 'use strict';
+const fs = require('fs');
+const readline = require('readline');
+const rs = fs.createReadStream('./popu-pref.csv');
+const rl = readline.createInterface({ input: rs, output: {} });
+const prefectureDataMap = new Map(); // key: 都道府県 value: 集計データのオブジェクト
+rl.on('line', lineString => {
+  const columns = lineString.split(',');
+  const year = parseInt(columns[0]);
+  const prefecture = columns[1];
+  const popu = parseInt(columns[3]);
+  if (year === 2010 || year === 2015) {
+    let value = prefectureDataMap.get(prefecture);
+    if (!value) {
+      value = {
+        popu10: 0,
+        popu15: 0,
+        change: null
+      };
+    }
+    if (year === 2010) {
+      value.popu10 = popu;
+    }
+    if (year === 2015) {
+      value.popu15 = popu;
+    }
+    prefectureDataMap.set(prefecture, value);
+  }
+});
+rl.on('close', () => {
+    for (let [key, value] of prefectureDataMap) {
+      value.change = value.popu15 / value.popu10;
+    }
+    const rankingArray = Array.from(prefectureDataMap).sort((pair1, pair2) => {
+      return pair2[1].change - pair1[1].change;
+    });
+    const rankingStrings = rankingArray.map(([key, value]) => {
+      return (
+        key +
+        ': ' +
+        value.popu10 +
+        '=>' +
+        value.popu15 +
+        ' 変化率:' +
+        value.change
+      );
+    });
+    console.log(rankingStrings);
+  });
\ No newline at end of file

From 6cc919bb3e41ba5bcc5dbe7b7431114ced1bc004 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=AE=AE=E6=9C=AC=E6=A2=A8=E6=B2=99?=
 <r_miyamoto@chitech.co.jp>
Date: Wed, 14 Jul 2021 19:52:58 +0900
Subject: [PATCH 2/2] =?UTF-8?q?=E3=83=A9=E3=83=B3=E3=82=AD=E3=83=B3?=
 =?UTF-8?q?=E3=82=B0=E9=A0=86=E4=BD=8D=E5=AE=9F=E8=A3=85=E5=AE=8C=E4=BA=86?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 intro-curriculum-3002 | 1 +
 1 file changed, 1 insertion(+)
 create mode 160000 intro-curriculum-3002

diff --git a/intro-curriculum-3002 b/intro-curriculum-3002
new file mode 160000
index 00000000..097ee46e
--- /dev/null
+++ b/intro-curriculum-3002
@@ -0,0 +1 @@
+Subproject commit 097ee46e5520e8eac4a650ec7a5331f2cf196553