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14 lines
279 B
JavaScript
14 lines
279 B
JavaScript
function isIsogram(str){
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str = str.toLowerCase();
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let encountered = new Set();
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for (let character of str.split('')) {
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if (!encountered.has(character)) {
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encountered.add(character);
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} else {
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return false;
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}
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}
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return true;
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}
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