Determine if a string has all unique characters: Difference between revisions

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→‎{{header|REXX}}: added zkl header
m (elided the forcing of the TOC (table of contents).)
m (→‎{{header|REXX}}: added zkl header)
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The characters in the string aren't all unique.
The character 0 ('30'x) at position 10 is repeated at position 25
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=={{header|zkl}}==
<lang zkl></lang>
<lang zkl></lang>
{{out}}
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