seek
How to delete only the content of file in python
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
seek to a point in html5 video
You can use v.currentTime = seconds; to seek to a given position. Reference: https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/currentTime
Safe to have multiple processes writing to the same file at the same time? [CentOs 6, ext4]
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
What is the most efficient way to get first and last line of a text file?
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
Memory Stream in Java
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.