isFinite.js 797 B

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  1. var root = require('./_root');
  2. /* Built-in method references for those with the same name as other `lodash` methods. */
  3. var nativeIsFinite = root.isFinite;
  4. /**
  5. * Checks if `value` is a finite primitive number.
  6. *
  7. * **Note:** This method is based on
  8. * [`Number.isFinite`](https://mdn.io/Number/isFinite).
  9. *
  10. * @static
  11. * @memberOf _
  12. * @since 0.1.0
  13. * @category Lang
  14. * @param {*} value The value to check.
  15. * @returns {boolean} Returns `true` if `value` is a finite number,
  16. * else `false`.
  17. * @example
  18. *
  19. * _.isFinite(3);
  20. * // => true
  21. *
  22. * _.isFinite(Number.MIN_VALUE);
  23. * // => true
  24. *
  25. * _.isFinite(Infinity);
  26. * // => false
  27. *
  28. * _.isFinite('3');
  29. * // => false
  30. */
  31. function isFinite(value) {
  32. return typeof value == 'number' && nativeIsFinite(value);
  33. }
  34. module.exports = isFinite;