6 ms·

They are... s = "hello" s << " world" s # hello world

• dbaupp 13y ago
  Is that allocating a new buffer, leaving the "hello" string to be collected by the GC?
  • tedunangst 13y ago
    No, it expands the existing buffer. (leaving " world" to be collected). Note that the following is different and more like what you're thinking. a = a + " world"
  • jeorgun 13y ago
    No, it's operating in place: def append_world(str) str << " world" end a = "hello" append_world(a) a #=> "hello world"