Remove json element

Question

I want to remove JSON element or one whole row from JSON   I have following JSON string         result                         FirstName    Test1               LastName     User                                  FirstName    user               LastName     user                                  FirstName    Ropbert               LastName     Jones                                  FirstName    hitesh               LastName     prajapti

User · Answer

You can try to delete the JSON as follows:

var bleh = {first: '1', second: '2', third:'3'}

alert(bleh.first);

delete bleh.first;

alert(bleh.first);

Alternatively, you can also pass in the index to delete an attribute:

delete bleh[1];

However, to understand some of the repercussions of using deletes, have a look here

User · Answer

if we want to remove one attribute say  quot firstName quot  from the array we can use map function along with delete as mentioned above    var result                         quot FirstName quot    quot Test1 quot               quot LastName quot     quot User quot                                  quot FirstName quot    quot user quot               quot LastName quot     quot user quot                                  quot FirstName quot    quot Ropbert quot               quot LastName quot     quot Jones quot                                  quot FirstName quot    quot hitesh quot               quot LastName quot     quot prajapti quot                  result map  el  gt       delete el  quot FirstName quot      console log  quot OUT quot  result

User · Answer

I recommend splice method to remove an object from JSON objects array   jQuery json  each function  index           if json index  FirstName     Test1                json splice index 1      This will remove the object that first name equals to Test1             return false     This will stop the execution of jQuery each loop                  I use this because when I use delete method  I get null object after I do JSON stringify json

User · Answer

try this  json     grep newcurrPayment paymentTypeInsert  function  el  idx    return el FirstName     Test1     true

User · Answer

var json            var key    foo   delete json key      Removes json foo from the dictionary    You can use splice to remove elements from an array

User · Answer

As described by  mplungjan  I though it was right  Then right away I click the up rate button  But by following it  I finally got an error    lt script gt  var data     result        FirstName   Test1   LastName   User   Email   test test com   City   ahmedabad   State   sk   Country   canada   Status   False   iUserID   23        FirstName   user   LastName   user   Email   u u com   City   ahmedabad   State   Gujarat   Country   India   Status   True   iUserID   41        FirstName   Ropbert   LastName   Jones   Email   Robert gmail com   City   NewYork   State   gfg   Country   fgdfgdfg   Status   True   iUserID   48        FirstName   hitesh   LastName   prajapti   Email   h prajapati zzz com   City      State      Country      Status   True   iUserID   78         alert data result  delete data result 3  alert data result   lt  script gt    Delete is just remove the data  but the  place  is still there as undefined   I did this and it works like a charm    data result splice 2 1       meaning   delete 1 item at position 3   because array is counted form 0  then item at no 3 is counted as no 2

User · Answer

Fix the errors in the JSON  http   jsonlint com  Parse the JSON  since you have tagged the question with JavaScript  use json2 js  Delete the property from the object you created Stringify the object back to JSON

User · Answer

Do NOT have trailing commas in your OBJECT  JSON is a string notation  UPDATE  you need to use array splice and not delete if you want to remove items from the array in the object  Alternatively filter the array for undefined after removing  x000D   x000D  var data        result           FirstName    Test1        LastName    User              FirstName    user        LastName    user         console log data result   console log  ------------ deleting -------------    delete data result 1   console log data result      note the  undefined  in the array    data        result           FirstName    Test1        LastName    User              FirstName    user        LastName    user          console log data result   console log  ------------ slicing -------------    var deletedItem   data result splice 1 1   console log data result      here no problem with undefined  x000D   x000D   x000D

User · Answer

All the answers are great  and it will do what you ask it too  but I believe the best way to delete this  and the best way for the garbage collector  if you are running node js  is like this   var json      lt your imported json here gt     var key    somekey   json key    null  delete json key     This way the garbage collector for node js will know that json  somekey   is no longer required  and will delete it

User · Answer

For those of you who came here looking for how to remove an object from a JSON array based on object value   x000D   x000D  let users      name    Ben     name    Tim     name    Harry       for  let  i  user  of users entries          if  user name     Tim             users splice i  1            x000D   x000D   x000D   User Tim is now removed from JSON array users

User · Answer

Try this following   var myJSONObject    ircEvent    PRIVMSG    method    newURI    regex     http         console log myJSONObject   console log myJSONObject ircEvent   delete myJSONObject ircEvent  delete myJSONObject regex  console log myJSONObject

[javascript] Remove json element

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