autocast.js 3.0 KB

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  1. "use strict";
  2. Object.defineProperty(exports, "__esModule", { value: true });
  3. class Autocast {
  4. constructor() {
  5. this.commonStrings = {
  6. 'true': true,
  7. 'false': false,
  8. 'undefined': undefined,
  9. 'null': null,
  10. 'NaN': NaN
  11. };
  12. }
  13. process(key, value, o) {
  14. if (typeof (value) === 'object')
  15. return;
  16. o[key] = this._cast(value);
  17. }
  18. traverse(o, func) {
  19. for (let i in o) {
  20. func.apply(this, [i, o[i], o]);
  21. if (o[i] !== null && typeof (o[i]) === 'object') {
  22. this.traverse(o[i], func);
  23. }
  24. }
  25. }
  26. autocast(s) {
  27. if (typeof (s) === 'object') {
  28. this.traverse(s, this.process);
  29. return s;
  30. }
  31. return this._cast(s);
  32. }
  33. _cast(s) {
  34. let key;
  35. if (s instanceof Date)
  36. return s;
  37. if (typeof s === 'boolean')
  38. return s;
  39. if (!isNaN(s))
  40. return Number(s);
  41. for (key in this.commonStrings) {
  42. if (s === key)
  43. return this.commonStrings[key];
  44. }
  45. return s;
  46. }
  47. }
  48. exports.default = Autocast;
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