如何格式化此文本文件

Question

我有一个文本文件，内容如下

   customer-1 Product-2
   customer-1 Product-3
   customer-1 Product-7
   customer-2 Product-20
   customer-2 Product-12
   ...

我想把它格式化为

  customer-1 Product-2, Product-3, Product-7, Product-20
  customer-2 Product-20, Product-12
  ...

如何在shell脚本或php中实现？

谢谢

Answer 1

通过管道将您的文件传输到此awk脚本。将在BOF中有一个额外的行，如果你需要删除它，使用'head‘。

awk 'BEGIN { one = ""; } { if ( one != $1 ) { printf("\n%s %s",$1,$2); one = $1; } else { printf(" %s",$2); } } END { printf("\n"); }'

Answer 2

使用PHP：

在每个新行\n

• loop上使用file_get_contents()

• explode()获得文本文件的内容，通过在每个空格

上使用结果数组和explode()获取文本文件的内容

然后将数据加载到多维数组中，并可以循环将其转换为所需的格式。

添加了代码示例(未测试)：

$file = file_get_contents('../path/to/file.txt');
$rows = explode('\n', $file);

$customers = array();

foreach($rows as $row) {
    $rowPieces = explode(' ',$row);
    $customers[$rowPieces[0]][] = $rowPieces[1];
}

foreach($customers as $c => $products) {
    $customers[$c] = implode(', ',$products);
}

echo implode('\n', $customers);

Answer 3

下面是你可以如何分解它：

• 为每行加载内容
• ，查找客户和产品
• 组 products per customer
  • output

例如：

// preg_match_all will find all "customer-" (digits) and "product-" (digits)
if (preg_match_all('/(customer-\d+)\s*(product-\d+)/i', $s, $matches, PREG_SET_ORDER)) {
        $purchases = array();
        foreach ($matches as $match) {
                // $match[1] contains customer id
                // $match[2] contains product id
                $purchases[$match[1]][] = $match[2];
        }
        // $purchases now contains a list of products, grouped by customer
        foreach ($purchases as $customer => $products) {
                echo $customer, ' ', join(', ', $products), PHP_EOL;
        }
}