Consider writing to a file. This is an expensive operation. If in your code you write one byte at a time, then each write of a byte is going to be very costly. So a common way to improve performance is to store the data that you are writing in a temporary buffer. Only when … Read more
One option is to use the delete method as follows: StringBuffer sb = new StringBuffer(); for (int n = 0; n < 10; n++) { sb.append(“a”); // This will clear the buffer sb.delete(0, sb.length()); } Another option (bit cleaner) uses setLength(int len): sb.setLength(0); See Javadoc for more info:
You can use <C-a> to complete all matches. So if you type :bd *.xml and then hit <C-a>, vim will complete the command to :bd file1.xml file2.xml file3.xml.
For nodejs 10.17.0 and up: const { Readable } = require(‘stream’); const stream = Readable.from(myBuffer);
If you want to do this the C++ way, do it like this: #include <fstream> #include <iterator> #include <algorithm> int main() { std::ifstream input( “C:\\Final.gif”, std::ios::binary ); std::ofstream output( “C:\\myfile.gif”, std::ios::binary ); std::copy( std::istreambuf_iterator<char>(input), std::istreambuf_iterator<char>( ), std::ostreambuf_iterator<char>(output)); } If you need that data in a buffer to modify it or something, do this: #include <fstream> … Read more
This is not how you initialize an array, but for: The first declaration: char buf[10] = “”; is equivalent to char buf[10] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; The second declaration: char buf[10] = ” “; is equivalent to char buf[10] = {‘ ‘, 0, 0, 0, 0, 0, 0, … Read more
The answers to these questions vary depending on whether you are using a stream socket (SOCK_STREAM) or a datagram socket (SOCK_DGRAM) – within TCP/IP, the former corresponds to TCP and the latter to UDP. How do you know how big to make the buffer passed to recv()? SOCK_STREAM: It doesn’t really matter too much. If … Read more
you can try stdbuf $ stdbuf –output=L ./a | tee output.txt (big) part of the man page: -i, –input=MODE adjust standard input stream buffering -o, –output=MODE adjust standard output stream buffering -e, –error=MODE adjust standard error stream buffering If MODE is ‘L’ the corresponding stream will be line buffered. This option is invalid with standard … Read more
You need to stringify the json, not calling toString var buf = Buffer.from(JSON.stringify(obj)); And for converting string to json obj : var temp = JSON.parse(buf.toString());
Optimum buffer size is related to a number of things: file system block size, CPU cache size and cache latency. Most file systems are configured to use block sizes of 4096 or 8192. In theory, if you configure your buffer size so you are reading a few bytes more than the disk block, the operations … Read more