flush

问题 In Java, flush() method is used in streams. But I don\'t understand what are all the purpose of using this method? fin.flush(); tell me some suggestions. 回答1: From the docs of the flush method: Flushes the output stream and forces any buffered output bytes to be written out. The general contract of flush is that calling it is an indication that, if any bytes previously written have been buffered by the implementation of the output stream, such bytes should immediately be written to their

问题 I have a php script that only produces logs to the client. When I echo something, I want it to be transferred to client on-the-fly. (Because while the script is processing, the page is blank) I had already played around with ob_start() and ob_flush() , but they didn\'t work. What\'s the best solution? PS: it is a little dirty to put a flush at the end of the echo call... EDIT: Neither the Answers worked, PHP or Apache Fault? 回答1: Edit: I was reading the commends on the manual page and came

问题 How often does Python flush to a file? How often does Python flush to stdout? I\'m unsure about (1). As for (2), I believe Python flushes to stdout after every new line. But, if you overload stdout to be to a file, does it flush as often? 回答1: For file operations, Python uses the operating system's default buffering unless you configure it do otherwise. You can specify a buffer size, unbuffered, or line buffered. For example, the open function takes a buffer size argument. http://docs.python

问题 How do I force Python\'s print function to output to the screen? This is not a duplicate of Disable output buffering - the linked question is attempting unbuffered output, while this is more general. The top answers in that question are too powerful or involved for this one (they\'re not good answers for this), and this question can be found on Google by a relative newbie. 回答1: On Python 3, print can take an optional flush argument print("Hello world!", flush=True) On Python 2 you'll have to

问题 Why does printf not flush after the call unless a newline is in the format string? Is this POSIX behavior? How might I have printf immediately flush every time? 回答1: The stdout stream is line buffered by default, so will only display what's in the buffer after it reaches a newline (or when it's told to). You have a few options to print immediately: Print to stderr instead using fprintf ( stderr is unbuffered by default): fprintf(stderr, "I will be printed immediately"); Flush stdout whenever