get size of json object

Question

i have a json object that gets returned by an AJAX request and I am having some trouble with the  length because it keeps returning undefined  Just wondering if I m using it right   console log data length   console log data phones length     They both return undefined even though they are valid objects   Update  Sample of the JSON object returned     reqStatus  true  phones    one    number   XXXXXXXXXX   type   mobile    two    number   XXXXXXXXXX   type   mobile

User · Answer

use this one    for getting length of object  int length   jsonObject length      or    for getting length of array  int length   jsonArray length

User · Answer

You can use something like this   lt script type  text javascript  gt     var myObject     name   Kasun    address   columbo   age    29      var count   Object keys myObject  length    console log count    lt  script gt

User · Answer

var json    id   431   code   0 85 PSFR01215   price   2457 77   volume   23 0   total   565 29     id   430   code   0 85 PSFR00608   price   1752 45   volume   4 0   total   70 1     id   429   code   0 84 SMAB00060   price   4147 5   volume   2 0   total   82 95     id   428   code   0 84 SMAB00050   price   4077 5   volume   3 0   total   122 32     var obj   JSON parse json   var length   Object keys obj  length    you get length json result 4

User · Answer

Your problem is that your phones object doesn t have a length property  unless you define it somewhere in the JSON that you return  as objects aren t the same as arrays  even when used as associative arrays  If the phones object was an array it would have a length  You have two options  maybe more     Change your JSON structure  assuming this is possible  so that  phones  becomes    phones     number   XXXXXXXXXX   type   mobile     number   XXXXXXXXXX   type   mobile       note there is no word-numbered identifier for each phone as they are returned in a 0-indexed array   In this response phones length will be valid  Iterate through the objects contained within your phones object and count them as you go  e g   var key  count   0  for key in data phones      if data phones hasOwnProperty key         count             If you re only targeting new browsers option 2 could look like this

User · Answer

Consider using underscore js  It will allow you to check the size i e  like that   var data    one   1  two   2  three   3     size data       gt  3   keys data       gt    one    two    three     keys data  length      gt  3

User · Answer

try this    parseJSON data  length

User · Answer

document  ready function              count my data   click function              var count   0          while  true                 try                   var v1   mydata count  TechnologyId toString                    count   count   1                            catch  e                break                      alert count

User · Answer

you dont need to change your JSON format   replace   console log data phones length     with   console log  Object keys  data phones   length

[javascript] get size of json object

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