Is IstringMap interface the best to find a string in a list?

[ldarrambide]

OK, cleaned some codes from advices given in last questions.

Now arise a new question:

I have _s containing some paths
_s=
c:\program files\myexe51.exe
c:\program files\myexe2.exe
c:\program files\myexe3.exe
c:\program files\myexe4.exe
c:\program files\myexe5.exe


and i have an array or another string variable of words

ARRAY(str) a1 or str s1="myexe1 mystuff anotherone somethingelse"

All tricks (IStringmaps, SelStr, StrCompare) will work on words alone, not with a find function.

I'd like to make another string/array with words in s1 or a1 matched in _s, and one with unmatched.

I tried many ways, found one with an intermediate array which works, but sure there must be simpler way.

What I did
foreach str'r _s
foreach str'rr s1
if(find(rr r)>-1) doaction
but i can't get the place to put unmatched words.

Thanks for help.