Unique characters: Difference between revisions

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(→‎{{header|J}}: simplify)
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=={{header|J}}==
<lang J>uniques =: [:/:~~.@;#~1=+#/"1@=@;.~</lang>
{{out}}
<pre> uniques ;'133252abcdeeffd';'a6789798st';'yxcdfgxcyz'
156bgstz</pre>
 
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