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  1. 'use strict';
  2. var ToNumber = require('./ToNumber');
  3. var abs = require('math-intrinsics/abs');
  4. var floor = require('math-intrinsics/floor');
  5. var $isNaN = require('math-intrinsics/isNaN');
  6. var $isFinite = require('math-intrinsics/isFinite');
  7. var $sign = require('math-intrinsics/sign');
  8. // http://262.ecma-international.org/5.1/#sec-9.4
  9. module.exports = function ToInteger(value) {
  10. var number = ToNumber(value);
  11. if ($isNaN(number)) { return 0; }
  12. if (number === 0 || !$isFinite(number)) { return number; }
  13. return $sign(number) * floor(abs(number));
  14. };