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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Remove-duplicate-elements/REXX/remove-duplicate-elements-2.rexx Normal file
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/*REXX program removes any duplicate elements (items) that are in a list (using a list).*/
$= '2 3 5 7 11 13 17 19 cats 222 -100.2 +11 1.1 +7 7. 7 5 5 3 2 0 4.4 2' /*item list.*/
say 'original list:' $
say right( words($), 17, '─') 'words in the original list.'
#= words($) /*process all the words in the list. */
do j=# by -1 for #; y= word($, j) /*get right-to-Left. */
_= wordpos(y, $, j + 1); if _\==0 then $= delword($, _, 1) /*Dup? Then delete it*/
end /*j*/
say
say 'modified list:' space($) /*stick a fork in it, we're all done. */
say right( words(z), 17, '─') 'words in the modified list.'