Get index of a key in json

Question

I have a json like so   json      key1     watevr1    key2     watevr2    key3     watevr3      Now  I want to know the index of a key  say  key2  in json - which is 1  Is there a way

User · Accepted Answer

Its too late  but it may be simple and useful  var json      key1     watevr1    key2     watevr2    key3     watevr3     var keytoFind    key2   var index   Object keys json  indexOf keytoFind   alert index

User · Answer

Try this  var json       key1     watevr1    key2     watevr2    key3     watevr3      json     parseJSON json    var i   0  req index         each json  function index  value       if index     key2            req index   i            i        alert req index

User · Answer

What you are after are numerical indexes in the way classic arrays work  however there is no such thing with json object associative arrays     key1    key2  themeselves are the indexes and there is no numerical index associated with them  If you want to have such functionality you have to assiciate them yourself

User · Answer

What you have is a string representing a JSON serialized javascript object  You need to deserialize it back a javascript object before being able to loop through its properties  Otherwise you will be looping through each individual character of this string   var resultJSON       key1     watevr1    key2     watevr2    key3     watevr3          var result     parseJSON resultJSON         each result  function k  v              display the key and value pair         alert k     is     v             or simply   arr forEach function  val  index  theArray          do stuff

User · Answer

In principle  it is wrong to look for an index of a key  Keys of a hash map are unordered  you should never expect specific order

User · Answer

You don t need a numerical index for an object key  but many others have told you that   Here s the actual answer   var json      key1     watevr1    key2     watevr2    key3     watevr3      console log  getObjectKeyIndex json   key2          Returns int 1   or null if the key doesn t exist   function getObjectKeyIndex obj  keyToFind        var i   0  key       for  key in obj            if  key    keyToFind                return i                     i               return null      Though you re PROBABLY just searching for the same loop that I ve used in this function  so you can go through the object   for  var key in json        console log key     is     json key        Which will output  key1 is watevr1 key2 is watevr2 key3 is watevr3

[javascript] Get index of a key in json

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