topic

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Summary: When I use a "for" loop to add layers to a violin plot (in ggplot), the only layer that is added is the one created by the final loop iteration. Yet in explicit code that mimics the code that the loop would produce, all the layers are added. Details: I am trying to create violin graphs with overlapping layers, to show the extent that estimate distributions do or do not overlap for several survey question responses, stratified by place. I want to be able to include any number of places, so I have one column in by dataframe for each

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: can anyone tell me, how to retrieve joined result from multiple tables in cakePHP ( using cakePHP mvc architecture). For example, I have three tables to join (tbl_topics, tbl_items, tbl_votes. Their relationship is defined as following: a topic can have many items and an item can have many votes. Now I want to retrieve a list of topics with the count of all votes on all items for each topic. The SQL query for this is written below: SELECT Topic.*, count(Vote.id) voteCount FROM tbl_topics AS Topic LEFT OUTER JOIN tbl_items AS Item ON (Topic

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I am using kafka 0.8 version and very much new to it. I want to know the list of topics created in kafka server along with it's metadata. Is there any API available to find out this? Basically, I need to write a Java consumer that should auto-discover any topic in kafka server .There is API to fetch TopicMetadata , but this needs name of topic as input parameters.I need information for all topics present in server. 回答1: A good place to start would be the sample shell scripts shipped with Kafka. In the /bin directory of the

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have issued the command to delete a topic: ./bin/kafka-topics.sh --zookeeper localhost:2181 --delete --topic vip_ips_alerts It seemed to give a happy response: [2014-05-31 20:58:10,112] INFO zookeeper state changed (SyncConnected) (org.I0Itec.zkclient.ZkClient) Topic "vip_ips_alerts" queued for deletion. But now 10 minutes later the topic still appears in the --list command: ./bin/kafka-topics.sh --zookeeper localhost:2181 --list vip_ips_alerts - marked for deletion So what does that mean? When will the topic be really deleted? How do I

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am using 'lda' package in R for topic modeling. I want to predict new topics(collection of related words in a document) using a fitted Latent Dirichlet Allocation(LDA) model for new dataset. In the process, I came across predictive.distribution() function. But the function takes document_sums as input parameter which is an output of the result after fitting the new model. I need help to understand the use of existing model on new dataset and predict topics. Here is the example code present in the documentation written by Johnathan Chang

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: i'm trying to get model objects instance in another one. And i raise this error : Manager isn't accessible via topic instance Here's my model : class forum(models.Model): # Some attributs class topic(models.Model): # Some attributs class post(models.Model): # Some attributs def delete(self): forum = self.topic.forum super(post, self).delete() forum.topic_count = topic.objects.filter(forum = forum).count() Here's my view : def test(request, post_id): post = topic.objects.get(id = int(topic_id)) post.delete() And i get : post.delete() forum

RabbitMQ 整体上是一个生产者与消费者模型，主要负责接收、存储和转发消息。可以把消息传递的过程想象成：当你讲一个包裹送到邮局，邮局会暂存并最终将邮件通过邮递员送到收件人的手上，RabbitMQ 就好比由邮局、邮箱和邮递员组成的一个系统。从计算机术语层面来说，RabbitMQ 模型更像是一种交换机模型。 RabbitMQ 的整体模型架构如下图： 生产者和消费者 Producer：生产者，就是投递消息的一方。 生产者创建消息，然后发不到 RabbitMQ 中。消息一般可以包含 2 个部分：消息体和标签（Label）。消息体也可以称之为 payload，在实际应用中，消息体一般是一个带有业务逻辑结构的数据，比如一个 JSON 字符串。当然可以进一步对这个消息体进行序列化操作。消息的标签用来表述这条消息，比如一个交换器的名称和一个路由键。生产者把消息交由 RabbitMQ，RabbitMQ 之后会根据标签把消息发送给感兴趣的消费者（Consumer）。 Consumer：消费者，就是接收消息的一方。 消费者连接到 RabbitMQ 服务器，并订阅到队列上。当消费者消费一条消息时，只是消费消息的消息体（payload）。在消息路由的过程中，消息的标签会丢弃，存入到队列中的消息只有消息体，消费者也会消费到消息体，也就不知道消息的生产者是谁，当然消费者也不需要知道。 Broker

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: When I tried to relate an attribute with another one which has an M to M relation I received this error: get() returned more than one topic -- it returned 2! Can you guys tell me what that means and maybe tell me in advance how to avoid this error ? models class LearningObjective(models.Model): learning_objective=models.TextField() class Topic(models.Model): learning_objective_topic=models.ManyToManyField(LearningObjective) topic=models.TextField() output of LearningObjective.objects.all() [ , , ] output of Topic.objects.all() [ , , , , , ,

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: We have a design approach which is creating a topic for each registered user. Creating a new user Save it to our database with a generated token Subscribe to /topics/{user-token} when user login on android or ios device. So if user have more than one device and if we want to send a user specific notification, we just send it to /topics/{user-token} so it received by all devices. We've not encountered any problem with a few users yet, but is that ok for Firebase limitations and is it a good approach? 回答1: (I am moving my comments into an

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I want to get data from socket and put it to kafka topic that my flink program can read data from topic and process it. I can do that on one node. But I want to have a kafka cluster with at least three different nodes(different IP address) and poll data from socket to distribute it among nodes.I do not know how to do this and change this code. My simple program is in following: public class WordCount { public static void main(String[] args) throws Exception { kafka_test objKafka=new kafka_test(); // Checking input parameters final