instance method

IO::Buffer#resize

(::Integer) -> self

resize(new_size) → self

static VALUE
io_buffer_resize(VALUE self, VALUE size)
{
    rb_io_buffer_resize(self, io_buffer_extract_size(size));

    return self;
}

Resizes a buffer to a new_size bytes, preserving its content. Depending on the old and new size, the memory area associated with the buffer might be either extended, or rellocated at different address with content being copied.

Example

buffer = IO::Buffer.new(4)
buffer.set_string("test", 0)
buffer.resize(8) # resize to 8 bytes
# =>
# #<IO::Buffer 0x0000555f5d1a1630+8 INTERNAL>
# 0x00000000  74 65 73 74 00 00 00 00                         test....

External buffer (created with ::for), and locked buffer can not be resized.

See also #readonly? #set_string #read #set_value also in 3.4 · 3.3 · 3.2 · 3.1

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