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code-point-at
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Editing: index.js
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/* eslint-disable babel/new-cap, xo/throw-new-error */ 'use strict'; module.exports = function (str, pos) { if (str === null || str === undefined) { throw TypeError(); } str = String(str); var size = str.length; var i = pos ? Number(pos) : 0; if (Number.isNaN(i)) { i = 0; } if (i < 0 || i >= size) { return undefined; } var first = str.charCodeAt(i); if (first >= 0xD800 && first <= 0xDBFF && size > i + 1) { var second = str.charCodeAt(i + 1); if (second >= 0xDC00 && second <= 0xDFFF) { return ((first - 0xD800) * 0x400) + second - 0xDC00 + 0x10000; } } return first; };
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