[ast-users] Are there any other ways to remove duplicated token values without re-ordering? nmake edit operator

[Sang . Hwan . Lee]

Hi,
How can I remove duplicated token values without sorting?
If I have duplicated values in an expanded variable, I could remove  
duplicated values with the heap sort operator ":H<=U".
But most of case I can not the heap sort operator because the order of  
token list is important. Are there any other ways to remove duplicated  
token values without re-ordering?

Thanks
Sang
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