End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
instance method
IO#getc
ios.getc → string or nil
io.c
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static VALUE
rb_io_getc(VALUE io)
{
rb_io_t *fptr;
rb_encoding *enc;
GetOpenFile(io, fptr);
rb_io_check_char_readable(fptr);
enc = io_input_encoding(fptr);
READ_CHECK(fptr);
return io_getc(fptr, enc);
}
Reads a one-character string from ios. Returns nil if called at end of file.
Example
f = File.new("testfile") f.getc #=> "h" f.getc #=> "e"