stringlisteachkdb+

kdb uses the symbol ' to compare strings one by one

I want to use ' to compare strings in a list, the code is as follows: "tbl" ~'("customer";"tbl") but reported an error：“length: Incompatible list lengths”。

The result I want to get is 01b This can be done with each： {"tbl"~ x} each ("customer";"tbl") Please tell me how to accomplish this task with '

Solution

  • Instead of each-both ' you want to use each-right /:

    "tbl"~/:("customer";"tbl")
01b

    https://code.kx.com/q/ref/maps/#each-left-and-each-right