JSON stringify doesn t work with normal Javascript array

Question

I must be missing something here  but the following code  Fiddle  returns an empty string   var test   new Array    test  a      test   test  b      test b   var json   JSON stringify test   alert json     What is the correct way of JSON ing this array

User · Answer

Json has to have key-value pairs  Tho you can still have an array as the value part  Thus add a  key  of your chousing   var json   JSON stringify  whatver  test

User · Answer

I posted a fix for this here  You can use this function to modify JSON stringify to encode arrays  just post it near the beginning of your script  check the link above for more detail       Upgrade for JSON stringify  updated to allow arrays  function           Convert array to object     var convArrToObj   function array           var thisEleObj   new Object            if typeof array     object                for var i in array                   var thisEle   convArrToObj array i                    thisEleObj i    thisEle                         else               thisEleObj   array                    return thisEleObj             var oldJSONStringify   JSON stringify      JSON stringify   function input           if oldJSONStringify input                       return oldJSONStringify convArrToObj input            else             return oldJSONStringify input

User · Answer

Alternatively you can use like this  var test   new Array    test 0      test 0   a      test   test 1      test 1   b      test b   var json   JSON stringify test   alert json     Like this you JSON-ing a array

User · Answer

JavaScript arrays are designed to hold data with numeric indexes  You can add named properties to them because an array is a type of object  and this can be useful when you want to store metadata about an array which holds normal  ordered  numerically indexed data   but that isn t what they are designed for    The JSON array data type cannot have named keys on an array   When you pass a JavaScript array to JSON stringify the named properties will be ignored   If you want named properties  use an Object  not an Array    x000D   x000D  const test          Object x000D  test a    test   x000D  test b          Array x000D  test b push  item    x000D  test b push  item2    x000D  test b push  item3    x000D  test b item4    A value      Ignored by JSON stringify x000D  const json   JSON stringify test   x000D  console log json   x000D   x000D   x000D

User · Answer

Nice explanation and example above  I found this  JSON stringify   array bizarreness with Prototype js  to complete the answer  Some sites implements  its own toJSON with JSONFilters  so delete it    if window Prototype        delete Object prototype toJSON      delete Array prototype toJSON      delete Hash prototype toJSON      delete String prototype toJSON      it works fine and the output of the test   console log json     Result       a   test   b    item   item2   item3

[javascript] JSON.stringify doesn't work with normal Javascript array

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