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

   1 'use strict';
   2
   3 var toArray  = require('./to-array')
   4   , isDate   = require('../date/is-date')
   5   , isRegExp = require('../reg-exp/is-reg-exp')
   6
   7   , isArray = Array.isArray, stringify = JSON.stringify
   8   , keyValueToString = function (value, key) { return stringify(key) + ':' + exports(value); };
   9
  10 var sparseMap = function (arr) {
  11         var i, l = arr.length, result = new Array(l);
  12         for (i = 0; i < l; ++i) {
  13                 if (!arr.hasOwnProperty(i)) continue;
  14                 result[i] = exports(arr[i]);
  15         }
  16         return result;
  17 };
  18
  19 module.exports = exports = function (obj) {
  20         if (obj == null) return String(obj);
  21         switch (typeof obj) {
  22         case 'string':
  23                 return stringify(obj);
  24         case 'number':
  25         case 'boolean':
  26         case 'function':
  27                 return String(obj);
  28         case 'object':
  29                 if (isArray(obj)) return '[' + sparseMap(obj) + ']';
  30                 if (isRegExp(obj)) return String(obj);
  31                 if (isDate(obj)) return 'new Date(' + obj.valueOf() + ')';
  32                 return '{' + toArray(obj, keyValueToString) + '}';
  33         default:
  34                 throw new TypeError("Serialization of " + String(obj) + "is unsupported");
  35         }
  36 };