distinct

From The K Language Wiki
(Redirected from Unique)
Distinct
?x

distinct, a.k.a. unique or uniq, returns a copy of its argument without duplicate items (according to the definition of match). K9 additionally sorts the result.

 ?"abracadabra"
"abrcd"
 ?"abracadabra" /k9
"abcdr"
{x@&(x?x)=!#x}  /k9 unsorted unique