buffer

问题 I am facing the issue.I changed the db.php file and unfortunately I put the spaces before and after the php tags.I used this in the image.php file.I am getting the error header already sent.I know that it is because of the space in db.php but I used ob_clean in image.php. Below is the code. spaceishere<?php $con=mysql_connect("localhost", "username", "password") or die ('I cannot connect to the database because: ' . mysql_error()); mysql_select_db("dbname",$con) or die ("Cannot Connect to

问题 I am wondering if there is an easy way to determine the length of a readStream in node js. I am writing a worker to upload PDFs to S3 and it is puking with the error: 'Cannot determine length of [object PDFDocument]'. The pdf is a readable stream (I can pipe it to a file in memory currently and view the generated pdf). Some stuff I was thinking about doing: 1. Piping the entire pdf to memory (such as to a buffer) and then call fstat on that buffer to determine the size. Creating some method

问题 I'm writing windows store app (8.1) and I have sample (probably for win 8.0): private WriteableBitmap WriteableBitmap; … WriteableBitmap = new WriteableBitmap(500,500); … using (Stream stream = WriteableBitmap.PixelBuffer.AsStream()) { … } So I have created new win 8.1 project and trying to do it same way, but when I get to: using (Stream stream = WriteableBitmap.PixelBuffer.AsStream()) My project dont recognize *.AsStream() method, can anyone tell me why? 回答1: using System.Runtime

问题 Say you have a buffer of size N which must be set to definite values (say to zero, or something else). This value setting in the buffer is divided over M threads, each handling N / M elements of the buffer. The buffer cannot be immutable , since we change the values. Message passing won't work either, since it is forbidden to pass ref or array (= pointer) types. So it must happen through shared ? No, since in my case the buffer elements are of type creal and thus arithmetics are not atomic.

问题 I am building a web site using googles Map API. However, as I am on a shared server, I do not have access to a database with spatial extensions. Given an itinerary, which is nothing more than a series of line segments, I need to build a polygon at a given distance. For example 10km either side of the itinerary. This is the classic buffering request, which I have seen as being referenced as the " Minkowski sum " algorithm. After having searched, I have not found a working example of an

问题 I think what glBindBuffer(target, buffer) do is to store the buffer's address on the target, which is a special address. But I found the glBindBufferBase(target, index, buffer) . I think target should be a array, this operation stores the buffer address to the array according to the index. If what I thought is right, then the glBindBuffer is equivalent to glBindBufferBase(target, someindex, buffer) ? Maybe someindex is 0? 回答1: They're not used for the same purpose. glBindBuffer is used to

问题 I'm having trouble serving binary data from node. I worked on a node module called node-speak which does TTS (text to Speech) and return a base64 encoded audio file. So far I'm doing this to convert from base64 to Buffer/binary and then serve it: // var src = Base64 data var binAudio = new Buffer(src.replace("data:audio/x-wav;",""), 'base64'); Now I'm trying to serve this audio from node with the headers like so: res.writeHead(200, { 'Content-Type': 'audio/x-wav', 'Content-Length': binAudio

问题 I'm using mod_proxy_fcgi with apache 2.4 on a debian Jessie with my C++ application which does ServerSentEvents with libfcgipp. My problem is, that apache still buffers my response data. I confirmed that it isn't buffered by the libfcgipp library by using wireshark: After starting the fcgi application via spawn-fcgi , the data gets send to the apache web server as soon as possible. But in my browser (which I use for testing, later there will be a C++ client) it only shows up after I "killed"

问题 If I have the following example file where each number is represents a byte (123 has bytes 1, 2, and 3): 123456789 Let's say I create a FileInputStream. This reads in the binary byte by byte. So .read() returns 1, then 2, etc. Now let's say I create a buffer. The initial chunk it reads in (if I understand buffers correctly) is 1-5. This allows it to not only read in byte by byte, but in the case of characters whole lines, etc. But if I hit .read() again, I start at 6, and NOT where the

问题 I need to save the contents of a pixel editor application into a .png file but I am having trouble finding the best way to accomplish this. The pixel data is stored in a 32 bit RGBA buffer. Can anyone suggest any good tools I could use to accomplish this? EDIT: Unfortunately, CGImage and representationUsingType: are not supported by cocotron and I need to be able to target my app for PC release as well, can anyone suggest a third way of accomplishing this task? 回答1: NSBitmapImageRep should