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davidaurelio/fearNotLetter.js

Created March 19, 2020 19:18
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fearNotLetter.js
function fearNotLetter(str) {
let last = str.charCodeAt(0);
for (let i = 1; i < str.length; ++i) {
const code = str.charCodeAt(i);
if (code !== last + 1) return String.fromCharCode(last + 1);
last = code;
}
}
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