git.r.bdr.sh - rbdr/dotfiles/blob

   1 'use strict';
   2
   3 var toString = Object.prototype.toString
   4
   5   , id = toString.call(1);
   6
   7 module.exports = function (x) {
   8         return ((typeof x === 'number') ||
   9                 ((x instanceof Number) ||
  10                         ((typeof x === 'object') && (toString.call(x) === id))));
  11 };