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rubyunbuffered

Unbuffered Read from File--Ruby

I need a way to read from a file, but reloading the data from the disk each time. How can this be done, short of using File.reopen every time?

Solution

  • You could use IO#rewind:

    fp = File.open('pancakes.txt')
s  = fp.read
# Something changes the first part pancakes.txt...
fp.rewind
s = fp.read # This reads again from the beginning

    This does of course require a seekable file but that shouldn't be a problem if you're using plain disk files.