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node_modules/es-abstract/2019/AbstractRelationalComparison.js
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1lostsun
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05 май 2025, 11:35
05 май 2025, 11:35
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'use strict'; var GetIntrinsic = require('get-intrinsic'); var $Number = GetIntrinsic('%Number%'); var $TypeError = require('es-errors/type'); var $isNaN = require('math-intrinsics/isNaN'); var $isFinite = require('math-intrinsics/isFinite'); var IsStringPrefix = require('./IsStringPrefix'); var ToNumber = require('./ToNumber'); var ToPrimitive = require('./ToPrimitive'); // https://262.ecma-international.org/9.0/#sec-abstract-relational-comparison module.exports = function AbstractRelationalComparison(x, y, LeftFirst) { if (typeof LeftFirst !== 'boolean') { throw new $TypeError('Assertion failed: LeftFirst argument must be a Boolean'); } var px; var py; if (LeftFirst) { px = ToPrimitive(x, $Number); py = ToPrimitive(y, $Number); } else { py = ToPrimitive(y, $Number); px = ToPrimitive(x, $Number); } if (typeof px === 'string' && typeof py === 'string') { if (IsStringPrefix(py, px)) { return false; } if (IsStringPrefix(px, py)) { return true; } return px < py; // both strings, neither a prefix of the other. shortcut for steps 3 c-f } var nx = ToNumber(px); var ny = ToNumber(py); if ($isNaN(nx) || $isNaN(ny)) { return undefined; } if ($isFinite(nx) && $isFinite(ny) && nx === ny) { return false; } if (nx === Infinity) { return false; } if (ny === Infinity) { return true; } if (ny === -Infinity) { return false; } if (nx === -Infinity) { return true; } return nx < ny; // by now, these are both nonzero, finite, and not equal };