delete x? false | |
typeof x = number | |
delete f? true | |
typeof f = undefined | |
delete foo? false | |
typeof foo = number | |
delete func? false | |
typeof func = function | |
delete foo? false | |
typeof foo? number | |
foo = 33 | |
x in function = local | |
delete x? = true | |
x after delete = global | |
x = global |