AIコードレビュー比較：Claude Code vs Qwen 3.5（35B）でJavaScriptリファクタリングを検証

const fs = require('fs');

// ユーザーの注文データを読み込んで月別売上レポートを出力するバッチ
// CSV形式: id,name,email,amount,date,category

var data = fs.readFileSync('orders.csv', 'utf-8');
var lines = data.split('\n');

var results = [];
var totalAmount = 0;
var categoryTotals = {};
var monthlyTotals = {};
var userPurchaseCount = {};
var errors = [];

// ヘッダースキップ
for (var i = 1; i < lines.length; i++) {
  if (lines[i] == '') {
    continue;
  }

  var columns = lines[i].split(',');
  var id = columns[0];
  var name = columns[1];
  var email = columns[2];
  var amount = columns[3];
  var date = columns[4];
  var category = columns[5];

  // バリデーション
  if (amount == undefined || amount == '' || amount == null) {
    errors.push('行 ' + i + ': 金額が空です');
    continue;
  }

  if (Number(amount) < 0) {
    errors.push('行 ' + i + ': 金額がマイナスです');
    continue;
  }

  // 金額を合計
  totalAmount = totalAmount + Number(amount);

  // カテゴリ別集計
  if (categoryTotals[category] == undefined) {
    categoryTotals[category] = 0;
  }
  categoryTotals[category] = categoryTotals[category] + Number(amount);

  // 月別集計
  var month = date.split('-')[0] + '-' + date.split('-')[1];
  if (monthlyTotals[month] == undefined) {
    monthlyTotals[month] = 0;
  }
  monthlyTotals[month] = monthlyTotals[month] + Number(amount);

  // ユーザーごとの購入回数
  if (userPurchaseCount[email] == undefined) {
    userPurchaseCount[email] = 0;
  }
  userPurchaseCount[email] = userPurchaseCount[email] + 1;

  // 結果に追加
  results.push({
    id: id,
    name: name,
    email: email,
    amount: Number(amount),
    date: date,
    category: category,
    month: month
  });
}

// レポート出力
var report = '';
report = report + '=== 売上レポート ===\n';
report = report + '処理件数: ' + results.length + '\n';
report = report + '総売上: ¥' + totalAmount + '\n';
report = report + '\n';

// カテゴリ別
report = report + '--- カテゴリ別売上 ---\n';
var categoryKeys = Object.keys(categoryTotals);
for (var i = 0; i < categoryKeys.length; i++) {
  var key = categoryKeys[i];
  var percent = categoryTotals[key] / totalAmount * 100;
  report = report + key + ': ¥' + categoryTotals[key] + ' (' + Math.round(percent) + '%)\n';
}
report = report + '\n';

// 月別
report = report + '--- 月別売上 ---\n';
var monthKeys = Object.keys(monthlyTotals);
for (var i = 0; i < monthKeys.length; i++) {
  var key = monthKeys[i];
  report = report + key + ': ¥' + monthlyTotals[key] + '\n';
}
report = report + '\n';

// トップ購入者
report = report + '--- 購入回数トップ5 ---\n';
var userKeys = Object.keys(userPurchaseCount);
var userList = [];
for (var i = 0; i < userKeys.length; i++) {
  userList.push({ email: userKeys[i], count: userPurchaseCount[userKeys[i]] });
}
// ソート
for (var i = 0; i < userList.length; i++) {
  for (var j = i + 1; j < userList.length; j++) {
    if (userList[j].count > userList[i].count) {
      var temp = userList[i];
      userList[i] = userList[j];
      userList[j] = temp;
    }
  }
}
for (var i = 0; i < 5; i++) {
  if (userList[i] != undefined) {
    report = report + (i + 1) + '位: ' + userList[i].email + ' (' + userList[i].count + '回)\n';
  }
}
report = report + '\n';

// エラー出力
if (errors.length > 0) {
  report = report + '--- エラー ---\n';
  for (var i = 0; i < errors.length; i++) {
    report = report + errors[i] + '\n';
  }
}

// ファイルに書き出し
fs.writeFileSync('report.txt', report);
console.log('レポートを出力しました: report.txt');
console.log('エラー件数: ' + errors.length);