| 1 | var toInteger = require('../internals/to-integer');
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| 2 | var toLength = require('../internals/to-length');
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| 3 |
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| 4 | // `ToIndex` abstract operation
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| 5 | // https://tc39.github.io/ecma262/#sec-toindex
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| 6 | module.exports = function (it) {
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| 7 | if (it === undefined) return 0;
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| 8 | var number = toInteger(it);
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| 9 | var length = toLength(number);
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| 10 | if (number !== length) throw RangeError('Wrong length or index');
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| 11 | return length;
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| 12 | };
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