stream

问题 How can I do dataflow (pipes and filters, stream processing, flow based) in C? And not with UNIX pipes. I recently came across stream.py. Streams are iterables with a pipelining mechanism to enable data-flow programming and easy parallelization. The idea is to take the output of a function that turns an iterable into another iterable and plug that as the input of another such function. While you can already do this using function composition, this package provides an elegant notation for it

问题 How can I do dataflow (pipes and filters, stream processing, flow based) in C? And not with UNIX pipes. I recently came across stream.py. Streams are iterables with a pipelining mechanism to enable data-flow programming and easy parallelization. The idea is to take the output of a function that turns an iterable into another iterable and plug that as the input of another such function. While you can already do this using function composition, this package provides an elegant notation for it

问题 I'm spawning a child that produces lots of data (I'm using 'ls -lR /' here as an example). I want to asynchronously read the child's stdout 100 bytes at a time. So I want to do: get100().then(process100).then(get100).then(process100).then(... For some reason, this code only loops 3 times and I stop getting Readable events. I can't figure out why? var Promise = require('bluebird'); var spawn = require("child_process").spawn; var exec = spawn( "ls", [ "-lR", "/"] ); var get100 = function () {

问题 I am trying to achieve s3 multipart upload with pause and resume options. I am using s3-upload-stream npm package for this. It works fine until user closes the application. When the user closes the application accidentally it means I have to resume the upload manually, so using I am this method as they mentioned: var upload = s3Stream.upload( { Bucket: "bucket-name", Key: "key-name", ACL: "public-read", StorageClass: "REDUCED_REDUNDANCY", ContentType: "binary/octet-stream" }, { UploadId:

问题 I had audio playing through URL, it is working fine using Wifi network but when i change to 3G or Data, it would give this error and it stuck at loading. > CredStore - performQuery - Error copying matching creds. Error=-25300, query={ class = inet; "m_Limit" = "m_LimitAll"; "r_Attributes" = 1; sync = syna; } <<<< AVOutputDeviceDiscoverySession (FigRouteDiscoverer) >>>> -[AVFigRouteDiscovererOutputDeviceDiscoverySessionImpl outputDeviceDiscoverySessionDidChangeDiscoveryMode:]: Setting device

问题 I had audio playing through URL, it is working fine using Wifi network but when i change to 3G or Data, it would give this error and it stuck at loading. > CredStore - performQuery - Error copying matching creds. Error=-25300, query={ class = inet; "m_Limit" = "m_LimitAll"; "r_Attributes" = 1; sync = syna; } <<<< AVOutputDeviceDiscoverySession (FigRouteDiscoverer) >>>> -[AVFigRouteDiscovererOutputDeviceDiscoverySessionImpl outputDeviceDiscoverySessionDidChangeDiscoveryMode:]: Setting device

问题 I had audio playing through URL, it is working fine using Wifi network but when i change to 3G or Data, it would give this error and it stuck at loading. > CredStore - performQuery - Error copying matching creds. Error=-25300, query={ class = inet; "m_Limit" = "m_LimitAll"; "r_Attributes" = 1; sync = syna; } <<<< AVOutputDeviceDiscoverySession (FigRouteDiscoverer) >>>> -[AVFigRouteDiscovererOutputDeviceDiscoverySessionImpl outputDeviceDiscoverySessionDidChangeDiscoveryMode:]: Setting device

问题 I'm trying to open a binary file for writing without erasing the content. But I do not want to write to eof. I want to write to a specific position in file. Here is a litte example: ofstream out("test.txt", ios::binary | ios::app); for(int i = 0; i < 100; i++) out.put('_'); out.write("Hallo", 5); out.close(); ofstream out2("test.txt", ios::binary | ios::app); out2.seekp(10); out2.write("Welt", 4); out2.close(); If using app, seek doesn't work. If not using app opening file erases data. Does

问题 I'm trying to open a binary file for writing without erasing the content. But I do not want to write to eof. I want to write to a specific position in file. Here is a litte example: ofstream out("test.txt", ios::binary | ios::app); for(int i = 0; i < 100; i++) out.put('_'); out.write("Hallo", 5); out.close(); ofstream out2("test.txt", ios::binary | ios::app); out2.seekp(10); out2.write("Welt", 4); out2.close(); If using app, seek doesn't work. If not using app opening file erases data. Does

问题 I'm working with an ASCII input/output stream over a Socket and speed is critical. I've heard using the right Java technique really makes a difference. I have a textbook that says using Buffers is the best way, but also suggests chaining with DataInputStreamReader. For output I'm using a BufferedOutputStream with OutputStreamWriter which seems to be fine. But I am unsure on what to use for the input stream. I'm working on new lines, so would Scanner be of any use? Speed is critical, I need to