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eof? 

        # IO.eof?

(from ruby core)
---
    eof?()

---

Returns `true` if the stream is positioned at its end, `false`
otherwise; see [Position](#class-IO-label-Position):

    f = File.open('t.txt')
    f.eof           # => false
    f.seek(0, :END) # => 0
    f.eof           # => true

Raises an exception unless the stream is opened for reading; see
[Mode](#class-IO-label-Mode).

If `self` is a stream such as pipe or socket, this method blocks until
the other end sends some data or closes it:

    r, w = IO.pipe
    Thread.new { sleep 1; w.close }
    r.eof? # => true # After 1-second wait.

    r, w = IO.pipe
    Thread.new { sleep 1; w.puts "a" }
    r.eof?  # => false # After 1-second wait.

    r, w = IO.pipe
    r.eof?  # blocks forever

Note that this method reads data to the input byte buffer.  So
IO#sysread may not behave as you intend with IO#eof?, unless you call
IO#rewind first (which is not available for some streams).

I#eof? is an alias for IO#eof.


(This method is an alias for IO#eof.)

Returns `true` if the stream is positioned at its end, `false`
otherwise; see [Position](#class-IO-label-Position):

    f = File.open('t.txt')
    f.eof           # => false
    f.seek(0, :END) # => 0
    f.eof           # => true

Raises an exception unless the stream is opened for reading; see
[Mode](#class-IO-label-Mode).

If `self` is a stream such as pipe or socket, this method blocks until
the other end sends some data or closes it:

    r, w = IO.pipe
    Thread.new { sleep 1; w.close }
    r.eof? # => true # After 1-second wait.

    r, w = IO.pipe
    Thread.new { sleep 1; w.puts "a" }
    r.eof?  # => false # After 1-second wait.

    r, w = IO.pipe
    r.eof?  # blocks forever

Note that this method reads data to the input byte buffer.  So
IO#sysread may not behave as you intend with IO#eof?, unless you call
IO#rewind first (which is not available for some streams).

I#eof? is an alias for IO#eof.

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