! Enumeration
Enumerated symbol list
x!y ![x;y]
Where
xis a handle to a symbol listyis an int vector in the domaintil count x
returns an enumerated symbol list. Enumeration is a uniform function.
q)x:`a`b`c`d
q)`x!1 2 3
`x$`b`c`d
Enum Extend,
Enumerate,
! bang
Q for Mortals §7.5 Enumerations, §8.5 Foreign Keys and Virtual Columns