io.open() is the preferred, higher-level interface to file I/O. It wraps the OS-level file descriptor in an object that you can use to access the file in a Pythonic manner. os.open() is just a wrapper for the lower-level POSIX syscall. It takes less symbolic (and more POSIX-y) arguments, and returns the file descriptor (a number) … Read more
In Windows, async operations are done by file operation, not by descriptor. There are several ways to wait on file operations to complete asynchronously. For example, if you want to know when data is available on a network socket, issue an async read request on the socket and when it completes, the data was available … Read more
This is prob not the best solution, BUT it worked for me. var reader = new FileReader(); reader.fileName = file.name // file came from a input file element. file = el.files[0]; reader.onload = function(readerEvt) { console.log(readerEvt.target.fileName); }; Not the best answer, but a working one.
Applying the answer given here I used dir() to print all the attributes of the results object. After that I searched for the one that contained the std err value and it turned out to be: print results.bse (Not sure what the b stands for in bse, but I guess the se stands for “standard … Read more
Streams handle bytes, Writers handle characters. Bytes != characters. A character may take more than one byte to represent. The mapping from characters to bytes is called an encoding. A FileStream refers to the bytes being written to a file, similar to how a MemoryStream refers to the bytes written to an in-memory buffer. In … Read more
Example using C++11: #include <iostream> #include <future> #include <thread> #include <chrono> static std::string getAnswer() { std::string answer; std::cin >> answer; return answer; } int main() { std::chrono::seconds timeout(5); std::cout << “Do you even lift?” << std::endl << std::flush; std::string answer = “maybe”; //default to maybe std::future<std::string> future = std::async(getAnswer); if (future.wait_for(timeout) == std::future_status::ready) answer = … Read more
read is slow. For bulk parsing, use bytestring or text primitives, or attoparsec. I did some benchmarking. Your original version ran in 23,9 secs on my computer. The version below ran in 0.35 secs: import qualified Data.ByteString.Char8 as B import Control.Applicative import Data.Maybe import Data.List import Data.Char main = print . sum =<< getIntList getIntList … Read more
The short answer to your question is that each of these three methods of reading bits of a file have different use cases. As noted above, f.read() reads the file as an individual string, and so allows relatively easy file-wide manipulations, such as a file-wide regex search or substitution. f.readline() reads a single line of … Read more
You need to use an ifstream if you just want to read (use an ofstream to write, or an fstream for both). To open a file in text mode, do the following: ifstream in(“filename.ext”, ios_base::in); // the in flag is optional To open a file in binary mode, you just need to add the “binary” … Read more
How about calling getBuffer().setLength(0)?