Method: IO#readbyte

Defined in:

io.c

#readbyte ⇒ Integer

Reads and returns the next byte (in range 0..255) from the stream; raises EOFError if already at end-of-stream. See Byte IO.

f = File.open('t.txt')
f.readbyte # => 70
f.close
f = File.open('t.rus')
f.readbyte # => 209
f.close

Related: IO#getbyte (will not raise EOFError).

Returns:

• (Integer)

# File 'io.c', line 5122

static VALUE
rb_io_readbyte(VALUE io)
{
    VALUE c = rb_io_getbyte(io);

    if (NIL_P(c)) {
        rb_eof_error();
    }
    return c;
}