12 lines
724 B
Rexx
12 lines
724 B
Rexx
/*REXX program removes any duplicate elements (items) that are in a list (using a hash).*/
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$= '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.*/
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say 'original list:' $
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say right( words($), 17, '─') 'words in the original list.'
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z=; @.= /*initialize the NEW list & index list.*/
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do j=1 for words($); y= word($, j) /*process the words (items) in the list*/
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if @.y=='' then z= z y; @.y= . /*Not duplicated? Add to Z list,@ array*/
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end /*j*/
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say
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say 'modified list:' space(z) /*stick a fork in it, we're all done. */
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say right( words(z), 17, '─') 'words in the modified list.'
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