15 lines
331 B
JavaScript
15 lines
331 B
JavaScript
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(() => {
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'use strict';
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// stringSucc :: Maybe String -> Maybe String
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const stringSucc = s =>
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isNaN(s) ? undefined : (Number(s) + 1).toString();
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// show :: a -> String
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const show = x => JSON.stringify(x, null, 2);
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return show(
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['2', '4', '8', '16', 'anomaly'].map(stringSucc)
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);
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})();
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