I think the documentation is correct, I think this is an implementation bug/limitation. J addons and base library append an & to y as workaround.
Чт, 01 дек 2016, Xiao-Yong Jin написал(а): > Dictionary says: > > 2!:1 y Spawn. (Unix only.) Like 2!:0, but yields '' without waiting > for the host to finish. Any output is ignored. For example, 2!:1 can be used > to invoke a text-editor. > > But I tested on Linux and Mac, 2!:1 on both still waits for the process to > finish. > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm -- regards, ==================================================== GPG key 1024D/4434BAB3 2008-08-24 gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3 gpg --keyserver subkeys.pgp.net --armor --export 4434BAB3 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm