On Mon, Jun 20, 2016 at 06:42:57PM -0700, L. A. Walsh wrote: > The local, it seems is sets the local attrib to any future references > of set/unset. Otherwise, it seems you'd have the situation of > local Psx_Cor; unset Psx_Cor, where the "unset", counterintuitively, > would unset the global, and the "local Psx_Cor" would just be > ignored because it wasn't _set_ to a value.
This is very similar to the observations Freddy Vulto made, and from which his "upvar" hack is derived: http://www.fvue.nl/wiki/Bash:_Unset http://www.fvue.nl/wiki/Bash:_Passing_variables_by_reference I'm not saying this is a thing I would recommend using in Bash scripts, but it's a thing that people may *be* using, since it has been known and documented (via third-party sources) for years.
