Determine if a string has all unique characters: Difference between revisions
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→{{header|Haskell}}: Edit to preamble of alternative draft (fold string to Map) |
m →{{header|JavaScript}}: Update to preamble of draft – folding a string down to a dictionary of indices |
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Or, as an alternative to sorting and grouping – folding a string down to a dictionary of indices:
<lang javascript>(() => {
'use strict';
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