main
Last change
on this file since 79a0317 was 79a0317, checked in by stefan toskovski <stefantoska84@…>, 3 days ago |
F4 Finalna Verzija
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100644
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File size:
891 bytes
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[d565449] | 1 | 'use strict';
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| 2 |
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| 3 | var $TypeError = require('es-errors/type');
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[79a0317] | 4 | var isNegativeZero = require('math-intrinsics/isNegativeZero');
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[d565449] | 5 |
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| 6 | var IsDetachedBuffer = require('./IsDetachedBuffer');
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| 7 | var IsIntegralNumber = require('./IsIntegralNumber');
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| 8 |
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| 9 | var typedArrayBuffer = require('typed-array-buffer');
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| 10 |
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| 11 | // https://262.ecma-international.org/12.0/#sec-isvalidintegerindex
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| 12 |
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| 13 | module.exports = function IsValidIntegerIndex(O, index) {
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| 14 | // Assert: O is an Integer-Indexed exotic object.
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| 15 | var buffer = typedArrayBuffer(O); // step 1
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| 16 |
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| 17 | if (typeof index !== 'number') {
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| 18 | throw new $TypeError('Assertion failed: Type(index) is not Number');
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| 19 | }
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| 20 |
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| 21 | if (IsDetachedBuffer(buffer)) { return false; } // step 2
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| 22 |
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| 23 | if (!IsIntegralNumber(index)) { return false; } // step 3
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| 24 |
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| 25 | if (isNegativeZero(index)) { return false; } // step 4
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| 26 |
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| 27 | if (index < 0 || index >= O.length) { return false; } // step 5
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| 28 |
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| 29 | return true; // step 6
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| 30 | };
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