KX Community

Dictionaries require lists to be passed to either side of !. You can use enlist to make lists from atoms:

• https://code.kx.com/q/ref/enlist/
• https://code.kx.com/q/basics/dictsandtables/#construction

q)d:.Q.def[enlist[`num1]!enlist 5].Q.opt .z.x

q)d
num1| 5

If you are using kdb 4.1 you can use the new dictionary syntax which does not need enlist

• https://code.kx.com/q//releases/ChangesIn4.1/#dictionary-literal-syntax

q)d:.Q.def[([num1:5])].Q.opt .z.x

q)d
num1| 5