ARGF.eof? รข true or false
Instance Public methods
Returns true if the current file in ARGF is at end of file,
i.e. it has no data to read. The stream must be opened for reading or an
IOError will be raised.
$ echo "eof" | ruby argf.rb
ARGF.eof? #=> false
3.times { ARGF.readchar }
ARGF.eof? #=> false
ARGF.readchar #=> "\n"
ARGF.eof? #=> true
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