Hash :
363281b3
Author :
Date :
2019-06-10T13:29:03
$foo
$* $@ $# $? $$ $! $0
${foo}
$!!!! $????
----------------------------------------------------
[
["variable", "$foo"],
["variable", "$*"],
["variable", "$@"],
["variable", "$#"],
["variable", "$?"],
["variable", "$$"],
["variable", "$!"],
["variable", "$0"],
["variable", ["${foo}"]],
["variable", "$!"],
["operator", ["!"]],
["operator", ["!"]],
["operator", ["!"]],
["variable", "$?"],
"???"
]
----------------------------------------------------
Checks for variables.