定义多维数组

Question

我正在尝试使用Gmail API在CMS上创建邮件功能，但我在创建数组时遇到了问题。

$Message = {}; 
      $Message['Date'] = getHeader(message.payload.headers, 'Date'); 
      $Message['From'] = getHeader(message.payload.headers, 'From'); 
      $Message['Subject'] = getHeader(message.payload.headers, 'Subject'); 
      $Message['Reply-to'] = getHeader(message.payload.headers, 'Reply-to'); 
      $Message['Body'] = getBody(message.payload); 
      $Message['ID'] = message.id; 

      $PartCount = 0; 

      for (var _ in message['payload']['parts']) $PartCount++; 

      if($PartCount > 2) { 
      $Message['hasAttachment'] = 'true'; 
      } else { 
      $Message['hasAttachment'] = 'false'; 
      } 

      if($PartCount > 2) { 
       $AttachmentCount = 1; 
       while($AttachmentCount <= $PartCount) { 
        $LocalAttachmentCount = ($AttachmentCount - 1); 
        if($Message.Subject == "AttachmentTest") { 
         console.log($Message); 
         console.log(message); 
        } 
        $Message['Attachment'] = {}; 
        $Message['Attachment'][($LocalAttachmentCount)] = {}; 
        $Message['Attachment'][($LocalAttachmentCount)]['FileName'] = message['payload']['parts'][$AttachmentCount]['filename']; 
        $AttachmentCount++; 
       } 
      } 

我收到的错误是如下

getgmail:551 Uncaught TypeError: Cannot read property 'filename' of undefined 
appendMessageRow 
@ getgmail:551(anonymous function) 
@ cb=gapi.loaded_0:628(anonymous function) 
@ cb=gapi.loaded_0:601(anonymous function) 
@ cb=gapi.loaded_0:167_.T.E.__cb 
@ cb=gapi.loaded_0:99g 
@ cb=gapi.loaded_0:93c 
@ cb=gapi.loaded_0:84 

，因为我此刻转圈圈任何建议，将不胜感激。

非常感谢，卢克。

编辑：我附上了我正在使用的数据的图像。这是写在jQuery的，但我的主要语言是PHP :)

原始JSON

{"id":"155e987feb707c32","threadId":"155e987feb707c32","labelIds":["SENT","INBOX","IMPORTANT"],"snippet":"Test for getting attachments in Expert.","historyId":"873165","internalDate":"1468501851000","payload":{"mimeType":"multipart/mixed","filename":"","headers":[{"name":"MIME-Version","value":"1.0"},{"name":"Received","value":"by 10.237.32.135 with HTTP; Thu, 14 Jul 2016 06:10:51 -0700 (PDT)"},{"name":"Date","value":"Thu, 14 Jul 2016 14:10:51 +0100"},{"name":"Delivered-To","value":"[email protected]"},{"name":"Message-ID","value":"<[email protected]om>"},{"name":"Subject","value":"AttachmentTest"},{"name":"From","value":"Sender <[email protected]>"},{"name":"To","value":"Receiver <[email protected]>"},{"name":"Content-Type","value":"multipart/mixed; boundary=001a113e81f03989b70537983b20"}],"body":{"size":0},"parts":[{"mimeType":"multipart/alternative","filename":"","headers":[{"name":"Content-Type","value":"multipart/alternative; boundary=001a113e81f03989aa0537983b1e"}],"body":{"size":0},"parts":[{"partId":"0.0","mimeType":"text/plain","filename":"","headers":[{"name":"Content-Type","value":"text/plain; charset=UTF-8"}],"body":{"size":41,"data":"VGVzdCBmb3IgZ2V0dGluZyBhdHRhY2htZW50cyBpbiBFeHBlcnQuDQo="}},{"partId":"0.1","mimeType":"text/html","filename":"","headers":[{"name":"Content-Type","value":"text/html; charset=UTF-8"}],"body":{"size":62,"data":"PGRpdiBkaXI9Imx0ciI-VGVzdCBmb3IgZ2V0dGluZyBhdHRhY2htZW50cyBpbiBFeHBlcnQuPC9kaXY-DQo="}}]},{"partId":"1","mimeType":"text/plain","filename":"text.txt","headers":[{"name":"Content-Type","value":"text/plain; charset=US-ASCII; name=\"text.txt\""},{"name":"Content-Disposition","value":"attachment; filename=\"text.txt\""},{"name":"Content-Transfer-Encoding","value":"base64"},{"name":"X-Attachment-Id","value":"f_iqmc263q1"}],"body":{"attachmentId":"ANGjdJ-R1qc49sxpIHWRJpj6_zPF70sshHhNsKvCAqxHkYzltyxfwme_or6vK069GaKpDJzjHrtVsZqtQkHjTUSzSYg5yUOqM5y618mmOOIJUL_NnnOvrmTWVh0fKfMY1FAMGy1RJeUkb7vrbdv6lYXnAHYwojPMVx1aIG6DPWqqieQdBdE9p0704yxvbfoUu9XjeueV1FRs4b1B7x9mcS8Jj_7-uKo7a4l9nVr2HfrdnL4RS8D1JwHe1-DZiF4xiEX2j4Gre-36FooEcOnuZ_1RQryecIh5Fq_kobtFco-4_jd-w8gIMZYSHVDzUiw","size":12}},{"partId":"2","mimeType":"image/png","filename":"White.png","headers":[{"name":"Content-Type","value":"image/png; name=\"White.png\""},{"name":"Content-Disposition","value":"attachment; filename=\"White.png\""},{"name":"Content-Transfer-Encoding","value":"base64"},{"name":"X-Attachment-Id","value":"f_iqmc1so00"}],"body":{"attachmentId":"ANGjdJ-6dRpb4OteV9kWWbffdzDBmaG-9uVd8HR3Ws7SmkrmxDN3x4kFxOzoZ7g_fHiEyTYxr4ntUDr9BkKd3ID4n4PXW9kCIdbJW_YxKPLF_9qo3Nkb9pphENvrk-sIt_uw7oB2GugjahjGclTdA4o4OmD99mWQ_A7a-b3ltDQc3qiek8KrhJ-lEi8nNo3PGu1PdRqLpNWqz3wgPE12NuhZRJngjNKOuymBw_DzSieO9qBKTNYHgVHyI0n7CQCTbT5C89Brdg3zsY_mQcME5EzzXc2AKMRvqj--pX_FSrEcvWez3aKrm0HJxkgWciQ","size":238}},{"partId":"3","mimeType":"image/jpeg","filename":"Black.jpg","headers":[{"name":"Content-Type","value":"image/jpeg; name=\"Black.jpg\""},{"name":"Content-Disposition","value":"attachment; filename=\"Black.jpg\""},{"name":"Content-Transfer-Encoding","value":"base64"},{"name":"X-Attachment-Id","value":"f_iqmc2wi72"}],"body":{"attachmentId":"ANGjdJ8vs2lX1yfy9JPaxb7Ugy1wROlbSMCwgJRsWrNeKlDDdVrIpePkfreijftYoi5uQGHAFYIyblwcDfFH4v9vuNXAbT-JpozA9RFHtpHdsIq-98wp7sW6hvqirNphvzzCD7TCg4fG-emzxsqPFvQF6Oc85EEZ0in7EMagtunwkd-z9VAcqzQd-i3u8134B7y4YiY_lDI2gtnjv6ioVJONbDFzYiAVxELEVuvNFJwlb4ZrCdAVExA4OZO0Xqgjvm1RfsiPNiHu3PNbXhX4lrdJLKImmdDkIpQMU2CbOjmiSyPcxy47St4mC1USr68","size":74292}}]},"sizeEstimate":76042,"result":{"id":"155e987feb707c32","threadId":"155e987feb707c32","labelIds":["SENT","INBOX","IMPORTANT"],"snippet":"Test for getting attachments in Expert.","historyId":"873165","internalDate":"1468501851000","payload":{"mimeType":"multipart/mixed","filename":"","headers":[{"name":"MIME-Version","value":"1.0"},{"name":"Received","value":"by 10.237.32.135 with HTTP; Thu, 14 Jul 2016 06:10:51 -0700 (PDT)"},{"name":"Date","value":"Thu, 14 Jul 2016 14:10:51 +0100"},{"name":"Delivered-To","value":"[email protected]"},{"name":"Message-ID","value":"<[email protected]om>"},{"name":"Subject","value":"AttachmentTest"},{"name":"From","value":"Sender <[email protected]>"},{"name":"To","value":"Receiver <[email protected]>"},{"name":"Content-Type","value":"multipart/mixed; boundary=001a113e81f03989b70537983b20"}],"body":{"size":0},"parts":[{"mimeType":"multipart/alternative","filename":"","headers":[{"name":"Content-Type","value":"multipart/alternative; boundary=001a113e81f03989aa0537983b1e"}],"body":{"size":0},"parts":[{"partId":"0.0","mimeType":"text/plain","filename":"","headers":[{"name":"Content-Type","value":"text/plain; charset=UTF-8"}],"body":{"size":41,"data":"VGVzdCBmb3IgZ2V0dGluZyBhdHRhY2htZW50cyBpbiBFeHBlcnQuDQo="}},{"partId":"0.1","mimeType":"text/html","filename":"","headers":[{"name":"Content-Type","value":"text/html; charset=UTF-8"}],"body":{"size":62,"data":"PGRpdiBkaXI9Imx0ciI-VGVzdCBmb3IgZ2V0dGluZyBhdHRhY2htZW50cyBpbiBFeHBlcnQuPC9kaXY-DQo="}}]},{"partId":"1","mimeType":"text/plain","filename":"text.txt","headers":[{"name":"Content-Type","value":"text/plain; charset=US-ASCII; name=\"text.txt\""},{"name":"Content-Disposition","value":"attachment; filename=\"text.txt\""},{"name":"Content-Transfer-Encoding","value":"base64"},{"name":"X-Attachment-Id","value":"f_iqmc263q1"}],"body":{"attachmentId":"ANGjdJ-R1qc49sxpIHWRJpj6_zPF70sshHhNsKvCAqxHkYzltyxfwme_or6vK069GaKpDJzjHrtVsZqtQkHjTUSzSYg5yUOqM5y618mmOOIJUL_NnnOvrmTWVh0fKfMY1FAMGy1RJeUkb7vrbdv6lYXnAHYwojPMVx1aIG6DPWqqieQdBdE9p0704yxvbfoUu9XjeueV1FRs4b1B7x9mcS8Jj_7-uKo7a4l9nVr2HfrdnL4RS8D1JwHe1-DZiF4xiEX2j4Gre-36FooEcOnuZ_1RQryecIh5Fq_kobtFco-4_jd-w8gIMZYSHVDzUiw","size":12}},{"partId":"2","mimeType":"image/png","filename":"White.png","headers":[{"name":"Content-Type","value":"image/png; name=\"White.png\""},{"name":"Content-Disposition","value":"attachment; filename=\"White.png\""},{"name":"Content-Transfer-Encoding","value":"base64"},{"name":"X-Attachment-Id","value":"f_iqmc1so00"}],"body":{"attachmentId":"ANGjdJ-6dRpb4OteV9kWWbffdzDBmaG-9uVd8HR3Ws7SmkrmxDN3x4kFxOzoZ7g_fHiEyTYxr4ntUDr9BkKd3ID4n4PXW9kCIdbJW_YxKPLF_9qo3Nkb9pphENvrk-sIt_uw7oB2GugjahjGclTdA4o4OmD99mWQ_A7a-b3ltDQc3qiek8KrhJ-lEi8nNo3PGu1PdRqLpNWqz3wgPE12NuhZRJngjNKOuymBw_DzSieO9qBKTNYHgVHyI0n7CQCTbT5C89Brdg3zsY_mQcME5EzzXc2AKMRvqj--pX_FSrEcvWez3aKrm0HJxkgWciQ","size":238}},{"partId":"3","mimeType":"image/jpeg","filename":"Black.jpg","headers":[{"name":"Content-Type","value":"image/jpeg; name=\"Black.jpg\""},{"name":"Content-Disposition","value":"attachment; filename=\"Black.jpg\""},{"name":"Content-Transfer-Encoding","value":"base64"},{"name":"X-Attachment-Id","value":"f_iqmc2wi72"}],"body":{"attachmentId":"ANGjdJ8vs2lX1yfy9JPaxb7Ugy1wROlbSMCwgJRsWrNeKlDDdVrIpePkfreijftYoi5uQGHAFYIyblwcDfFH4v9vuNXAbT-JpozA9RFHtpHdsIq-98wp7sW6hvqirNphvzzCD7TCg4fG-emzxsqPFvQF6Oc85EEZ0in7EMagtunwkd-z9VAcqzQd-i3u8134B7y4YiY_lDI2gtnjv6ioVJONbDFzYiAVxELEVuvNFJwlb4ZrCdAVExA4OZO0Xqgjvm1RfsiPNiHu3PNbXhX4lrdJLKImmdDkIpQMU2CbOjmiSyPcxy47St4mC1USr68","size":74292}}]},"sizeEstimate":76042}} 

我的JSON

{"Date":"Thu, 14 Jul 2016 14:10:51 +0100","From":"Sender <[email protected]>","Subject":"AttachmentTest","Reply-to":"","Body":"<div dir=\"ltr\">Test for getting attachments in Expert.</div>\r\n","ID":"155e987feb707c32","hasAttachment":"true"} 

EDIT2：

这是代码已经为我工作，attachment1用于调试目的

$Message = {}; 
         $Message['Date'] = getHeader(message.payload.headers, 'Date'); 
         $Message['From'] = getHeader(message.payload.headers, 'From'); 
         $Message['Subject'] = getHeader(message.payload.headers, 'Subject'); 
         $Message['Reply-to'] = getHeader(message.payload.headers, 'Reply-to'); 
         $Message['Body'] = getBody(message.payload); 
         $Message['ID'] = message.id; 

         $Message['Attachment1'] = {}; 
         $Message['Attachment'] = {}; 
         for (let key in message['payload']['parts']) { 
          if(message['payload']['parts'][key]['filename'] != "") { 
           $Message['Attachment1'][key] = message['payload']['parts'][key]; 
           console.log(message['payload']['parts'][key]['filename']); 
           $Message['Attachment'][key] = {}; 
           $Message['Attachment'][key]['FileName'] = message['payload']['parts'][key]['filename']; 
          } 
         } 

Answer 1

看来，您在每个变量前面都使用$，这是PHP的一项要求，但绝对不是JavaScript所必需的。括号()约($LocalAttachmentCount)也不是必需的。

Btw：{}初始化不是一个数组，而是一个对象（通过空的对象字面值）。但是JavaScript中的对象与PHP中的关联数组有一些相似之处，所以你可以这样使用它，如你的例子所示。

下面的代码实际上是运行对我很好，因为你可以看到，如果你运行它：

Message = {}; 
 
AttCount = 1; 
 
while(AttCount <= 4) { 
 
    LocalAttCount = (AttCount - 1); 
 
    Message['Attachment'] = {}; // reset to empty Object here! 
 
    Message['Attachment'][LocalAttCount] = {}; 
 
    Message['Attachment'][LocalAttCount]['FileName'] = 'ac' + AttCount; 
 
    document.writeln(Message['Attachment'][LocalAttCount]['FileName']); 
 
    document.writeln('<br>'); 
 
    AttCount++; 
 
}

但意外的行为可能来自标记线：Message['Attachment'] = {};套每个循环中的Message['Attachment']回到一个空的对象。因此它会删除所有前[LocalAttCount]。因此，只要移动这条线圈外的，你可能会得到您预期的行为：

Message = {}; 
 
Message['Attachment'] = {}; // move this line here! 
 
AttCount = 1; 
 
while(AttCount <= 4) { 
 
    LocalAttCount = (AttCount - 1); 
 
    Message['Attachment'][LocalAttCount] = {}; 
 
    Message['Attachment'][LocalAttCount]['FileName'] = 'ac' + AttCount; 
 
    for (let key in Message['Attachment']) { 
 
    if (Message['Attachment'].hasOwnProperty(key)) { 
 
     document.writeln(Message['Attachment'][key]['FileName']); 
 
    } 
 
    } 
 
    document.writeln('<br>'); 
 
    AttCount++; 
 
}