On 2015-12-20 12:54 AM, funny.falcon / gmail.com wrote: > I like optional arg to pop: > Either `pop?` or `pop(on_close: value)` Another possibility is a default proc similar to how Hash#fetch interface works. Unsubscribe: <mailto:ruby-core-request / ruby-lang.org?subject=unsubscribe> <http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>