How to delete only the content of file in python There are several ways of setting the logical size of a file to 0, depending how you access that file: To empty an open file: def deleteContent(pfile): pfile.seek(0) pfile.truncate() To empty an open file whose file descriptor is known: def deleteContent(fd): os.ftruncate(fd, 0) os.lseek(fd, 0, … Read more
You can use v.currentTime = seconds; to seek to a given position. Reference: https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/currentTime
What you’re doing seems perfectly OK, provided you’re using the POSIX “raw” IO syscalls such as read(), write(), lseek() and so forth. If you use C stdio (fread(), fwrite() and friends) or some other language runtime library which has its own userspace buffering, then the answer by “Tilo” is relevant, in that due to the … Read more
To read both the first and final line of a file you could… open the file, … … read the first line using built-in readline(), … … seek (move the cursor) to the end of the file, … … step backwards until you encounter EOL (line break) and … … read the last line from … Read more
ByteArrayInputStream and ByteArrayOutputStream is what you are looking for. These are implementations of the interfaces InputStream and OutputStream that read from and write to a byte array in memory. For ByteArrayOutputStream, the array will grow automatically as you write data to the stream.