SetDataIndex.js 856 B

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  1. 'use strict';
  2. var $TypeError = require('es-errors/type');
  3. var CanonicalizeKeyedCollectionKey = require('./CanonicalizeKeyedCollectionKey');
  4. var SameValue = require('./SameValue');
  5. var isArray = require('../helpers/IsArray');
  6. // https://262.ecma-international.org/16.0/#sec-setdataindex
  7. module.exports = function SetDataIndex(setData, value) {
  8. if (!isArray(setData) && setData !== 'EMPTY') {
  9. throw new $TypeError('Assertion failed: `setData` must be a List or ~EMPTY~');
  10. }
  11. var canonValue = CanonicalizeKeyedCollectionKey(value); // step 1
  12. var size = setData.length; // step 2
  13. var index = 0; // step 3
  14. while (index < size) { // step 4
  15. var e = setData[index]; // step 4.a
  16. if (/* e !== ~EMPTY~ && */ SameValue(e, canonValue)) { // step 4.b
  17. return index; // step 4.b.i
  18. }
  19. index += 1; // step 4.c
  20. }
  21. return 'NOT-FOUND'; // step 5
  22. };