stream

问题 Consider the following code: StreamBuilder<QuerySnapshot> _createDataStream(){ return StreamBuilder<QuerySnapshot>( stream: Firestore.instance.collection("data").limit.(_myLimit).snapshots(), builder: (context, snapshot){ return Text(_myLimit.toString); } ); } I want that the StreamBuilder refreshes when the _myLimit Variable changes. It's possible doing it like this: void _incrementLimit(){ setState(() =>_myLimit++); } My Question is if there is another, faster way, except the setState((){})

问题 I'm trying to append some data to a stream. This works well with FileStream , but not for MemoryStream due to the fixed buffer size. The method which writes data to the stream is separated from the method which creates the stream (I've simplified it greatly in the below example). The method which creates the stream is unaware of the length of data to be written to the stream. public void Foo(){ byte[] existingData = System.Text.Encoding.UTF8.GetBytes("foo"); Stream s1 = new FileStream(

问题 I'm dealing with some Java code in which there's an InputStream that I read one time and then I need to read it once again in the same method. The problem is that I need to reset it's position to the start in order to read it twice. I've found a hack-ish solution to the problem: is.mark(Integer.MAX_VALUE); //Read the InputStream is fully // { ... } try { is.reset(); } catch (IOException e) { e.printStackTrace(); } Does this solution lead to some unespected behaviours? Or it will work in it's

问题 I'm trying to create video stream server and client with node fluent-ffmpeg , express and ejs . And a haven't solve this for a while. What I want to do is to play video beginning by certain time. The following codes make it with Safari browser on windows but with others it makes a loop of a few seconds or it says video format not supported server code (run.js) : app.get('/video', function(req, res) { //define file path,time to seek the beegining and set ffmpeg binary var pathToMovie = '..

问题 I'm trying to create video stream server and client with node fluent-ffmpeg , express and ejs . And a haven't solve this for a while. What I want to do is to play video beginning by certain time. The following codes make it with Safari browser on windows but with others it makes a loop of a few seconds or it says video format not supported server code (run.js) : app.get('/video', function(req, res) { //define file path,time to seek the beegining and set ffmpeg binary var pathToMovie = '..

问题 I can't open a connection with Twitter Stream API. The only response I can get, no matter what I try, is 401 Unauthorized . I've made all kinds of tests, even using some libraries I've found on GitHub. Even outside my code, using cURL, I can't make it work. $oauth = array( 'oauth_consumer_key' => $this->m_oauth_consumer_key, 'oauth_nonce' => time(), 'oauth_signature_method' => 'HMAC-SHA1', 'oauth_token' => $this->m_oauth_token, 'oauth_timestamp' => time(), 'oauth_version' => '1.0' ); $base

问题 Right now each module is writing to stderr, thus I cannot turnoff output of an individual one. Does anyone know how I can associate a stream with stdout thus each module will write to independent stream so I can turn it off. For example: fprintf(newStdout, "hello"); newStdout is writing to the screen. I don't know how to associate newStdout with the screen. 回答1: If your aim is to just have newStdout behave like stdout some of the time and silence it some of the time, you can do something like

问题 The title basically explains itself. I have a REST endpoint with VertX . Upon hitting it, I have some logic which results in an AWS-S3 object. My previous logic was not to upload to S3 , but to save it locally. So, I can do this at the response routerCxt.response().sendFile(file_path...) . Now that the file is in S3, I have to download it locally before I could call the above code. That is slow and inefficient. I would like to stream S3 object directly to the response object. In Express , it

问题 The title basically explains itself. I have a REST endpoint with VertX . Upon hitting it, I have some logic which results in an AWS-S3 object. My previous logic was not to upload to S3 , but to save it locally. So, I can do this at the response routerCxt.response().sendFile(file_path...) . Now that the file is in S3, I have to download it locally before I could call the above code. That is slow and inefficient. I would like to stream S3 object directly to the response object. In Express , it

问题 The title basically explains itself. I have a REST endpoint with VertX . Upon hitting it, I have some logic which results in an AWS-S3 object. My previous logic was not to upload to S3 , but to save it locally. So, I can do this at the response routerCxt.response().sendFile(file_path...) . Now that the file is in S3, I have to download it locally before I could call the above code. That is slow and inefficient. I would like to stream S3 object directly to the response object. In Express , it