Question

我正在尝试从JSON数组中删除一段数据。例如，我有这个数组;

var users = [];
io.on('connection',function(socket){
   socket.on('nickname', function(nick){
      socket.nick = nick;
       users.push({
         user:socket.nick,
         userid:socket.id,
         socket:socket
       });
    });

我试图以这种方式删除用户;

socket.on('disconnect', function(){
    delete users[{
        user,
        userid,
        socket
    }];
   });
 });

我该怎么做？

Answer 1

您可以尝试使用lodash方法来实现您的目标： -

 // Contact Form
    add_shortcode('contact_form', 'theme_shortcode_contact_form');
    function theme_shortcode_contact_form($atts, $content = null, $code) {
        extract(shortcode_atts(array(
            'mail_to' => '',
            'form_id' => false,
            'button_color' => 'black'
        ), $atts));

        $id = mt_rand(0, 1000);
        $template_directory = get_template_directory_uri();
        $ajax_url = admin_url('admin-ajax.php');

        $mail_to = str_replace('@','[at]',$mail_to);

        $name_text = __('Name', 'theme_front');
        $email_text = __('Email', 'theme_front');
            $phonenumber_text = __('Phone Number', 'theme_front');
            $address_text = __('Property Address', 'theme_front');
        $message_text = __('Message', 'theme_front');
        $submit_text = __('Submit', 'theme_front');

        $form_id = ( $form_id ) ? '<input type="hidden" name="form-id" value="' . $form_id . '" />' : '';

        return <<<RET
    [raw]
    <form method="post" action="$ajax_url" id="form-$id" class="contact-form ajax-form validate-form">
        <div class="form-input-item clearfix">
            <label for="contact-form-$id-contact-name">$name_text <span class="required-star">*</span></label>
            <input type="text" class="input-text" name="contact-name-h" id="contact-form-contact-name-h">
            <input type="text" tabindex="8" size="22" value="" class="input-text {required:true}" name="contact-name" id="contact-form-$id-contact-name">
            <div class="form-error-box"></div>
        </div>

        <div class="form-input-item clearfix">
            <label for="contact-form-$id-contact-email">$email_text <span class="required-star">*</span></label>
            <input type="text" tabindex="9" size="22" value="" class="input-text {required:true, email:true}" name="contact-email" id="contact-form-$id-contact-email">
            <div class="form-error-box"></div>
        </div>

            <div class="form-input-item clearfix">
            <label for="contact-form-$id-contact-phonenumber">$phonenumber_text <span class="required-star">*</span></label>
            <input type="text" tabindex="9" size="22" value="" class="input-text {required:true}" name="contact-phonenumber" id="contact-form-$id-contact-phonenumber">
            <div class="form-error-box"></div>
        </div>

            <div class="form-input-item clearfix">
            <label for="contact-form-$id-contact-address">$address_text <span class="required-star">*</span></label>
            <input type="text" tabindex="9" size="22" value="" class="input-text {required:true}" name="contact-address" id="contact-form-$id-contact-address">
            <div class="form-error-box"></div>
        </div>

        <div class="form-input-item clearfix">
            <label for="contact-form-$id-contact-content">$message_text <span class="required-star">*</span></label>
            <textarea tabindex="10" rows="3" cols="30" class="input-textarea {required:true}" id="contact-form-$id-contact-content" name="contact-content"></textarea>
            <div class="form-error-box"></div>
        </div>

        <div class="form-response"></div>

        <div class="form-input-item form-input-item-last clearfix">
            <button class="button medium $button_color" type="submit"><span>$submit_text</span></button>
        </div>
        $form_id
        <input type="hidden" name="mail_to" value="$mail_to">
        <input type="hidden" name="action" value="do_contact" />
    </form>

看看这是否有效..

Answer 2

如果您知道每个用户对象的每个属性的值，您可以将值传递给函数并循环通过users数组以查找匹配的对象，然后将其从数组中拼接（更新的答案通过在对象中起作用）：

＆＃13;

var users = [];
for (var i = 1; i < 10; i++) {
  users.push({
    user: i,
    userId: i,
    socket: i
  });
}

/**
 * Loop through the users array to find matching 
 * object to remove
 **/
var deleteUser = function(userToDelete) {
  for (var userObj in users) {
    var userObject = users[userObj];
    if (typeof userObject === "object" &&
      userObject.user === userToDelete.user &&
      userObject.userId === userToDelete.userId &&
      userObject.socket === userToDelete.socket) {
      users.splice(userObj, 1);
      break;
    }
  }
  console.log(users);
};

deleteUser({
  user: 2,
  userId: 2,
  socket: 2
});

＆＃13;

删除数组中的JSON数据

2 个答案: