http://www.perlmonks.org?node_id=11132339


in reply to Re^2: Attempting to use $_ in "sub" inside "map"
in thread Attempting to use $_ in "sub" inside "map"

In languages without lexically scoped variables or something approximating them, there's not really any such thing as a closure. You can still have first-class functions (i.e. coderefs); they just have no need to close over anything.