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September 2017 Update

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Ingy döt Net 2017-09-23 10:01:46 +02:00
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Task/Remove-duplicate-elements/REXX/remove-duplicate-elements-2.rexx
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@ -1,12 +1,12 @@
/*REXX program to remove duplicate elements (items) in 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'
/*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($),13) ' words in the original list.'; say
do j=words($) by -1 to 1; y=word($,j) /*process words in the list, */
_=wordpos(y, $, j+1); if _\==0 then $=delword($, _, 1) /*del if dup.*/
end /*j*/
say 'modified list:' space($)
say right(words($),13) ' words in the modified list.'
/*stick a fork in it, we're done.*/
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($)
say right( words(z), 17, '─') 'words in the modified list.'
/*stick a fork in it, we're all done. */