In kdb I would like to have a function which takes a string as a parameter.

```
myfunc: {[strParam]
    .... 
}

```

However when I tried to invoke the function.

```
q) myfunc["test"]

```

It complains of `length` error. It seems that function sees `"test"` as passing 4 char parameters. How can I make the function expect a string?