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instance method

IO::Buffer#empty?

() -> bool

empty? → true or false

static VALUE
rb_io_buffer_empty_p(VALUE self)
{
    struct rb_io_buffer_view *buffer = get_io_buffer_view(self);

    return RBOOL(buffer->size == 0);
}

Returns whether the buffer has zero size.

A buffer can be empty but have a non-null address, for example a zero-sized slice or a buffer created with ::for from an empty string. Therefore empty? does not imply null?.

See also #each_byte #get_string #each #get_value also in 4.0 · 3.4 · 3.3 · 3.2 · 3.1

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