1 | 'use strict';
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2 | var $ = require('../internals/export');
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3 | var uncurryThis = require('../internals/function-uncurry-this');
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4 | var requireObjectCoercible = require('../internals/require-object-coercible');
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5 | var toString = require('../internals/to-string');
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6 |
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7 | var charCodeAt = uncurryThis(''.charCodeAt);
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8 |
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9 |
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10 |
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11 | $({ target: 'String', proto: true }, {
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12 | isWellFormed: function isWellFormed() {
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13 | var S = toString(requireObjectCoercible(this));
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14 | var length = S.length;
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15 | for (var i = 0; i < length; i++) {
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16 | var charCode = charCodeAt(S, i);
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17 |
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18 | if ((charCode & 0xF800) !== 0xD800) continue;
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19 |
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20 | if (charCode >= 0xDC00 || ++i >= length || (charCodeAt(S, i) & 0xFC00) !== 0xDC00) return false;
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21 | } return true;
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22 | }
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23 | });
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