"Property currentLabel not found on String"

Question

This is the error message I keep getting with the following setup:
I have several button instances onstage named "1gun", "2gun", "3gun" and so on.
There are also several button instances onstage named "1bullseye","2bullseye" and so on.
When I use this code and click on a button containing an index of gun,it returns the number preceding the string "gun", just as I want it to do.:
{trace (e.currentTarget.name.slice(0,1))}
When I use this code and click on a gun button, it returns  the name of the "bullseye" button that corresponds with the "gun": button:
{trace ("bullseye" + e.currentTarget.name.slice(0,1))}
However, when I use this code, I get the output error in the title of this thread:
{trace("bullseye" + e.currentTarget.name.slice(0,1).currentLabel)}
Property currentLabel not found on String and there is no default value.
The code is intended to trace the current frame of a bullseye when the corresponding gun is clicked. So if "1gun" is clicked, it would trace the currentFrame of "1bullseye".
Any ideas about why this isn't working?

Answer 1

The following is just a String, which does not have a property named currentLabel...
"bullseye" + e.currentTarget.name.slice(0,1)
If there is a MovieClip that has an instance name of bullseye#  (where # is some number), then you need to use bracket notation to have that String interpretted as an instance of an object....
{trace(this[ "bullseye" + e.currentTarget.name.slice(0,1)].currentLabel)}