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Is it possible to clear empty :-tied elements?

Hi,

I'm using typeset -UT to unique a scalar variable:

export -UT CMAKE_PREFIX_PATH="$ZPFX:$CMAKE_PREFIX_PATH" cmake_prefix_path

The problem is that the variable/array will contain empty element if the variable is empty when export is run.

I wonder if is it possible to somehow clear such empty entry (i.e.: to remove :: from "a::b") without another line of code?

Best regards,

Sebastian Gniazdowski

Follow-Ups:
- Re: Is it possible to clear empty :-tied elements?
  - From: Phil Pennock
- Re: Is it possible to clear empty :-tied elements?
  - From: Bart Schaefer

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