Adding new Object inside Json at the front

Question

I am having a json object Like this

[{"SubLoc":"a","Description":"A","Equipment":""},{"SubLoc":"b","Description":"B","Equipment":""},{"SubLoc":"c","Description":"C","Equipment":""},{"SubLoc":"d","Description":"D","Equipment":""}]

I want to add one more attribute in front so that the JSON will look like

[{"SubLoc":"Select","Description":"Select","Equipment":""},{"SubLoc":"a","Description":"A","Equipment":""},{"SubLoc":"b","Description":"B","Equipment":""},{"SubLoc":"c","Description":"C","Equipment":""},{"SubLoc":"d","Description":"D","Equipment":""}]

i tried unshift like this-

$scope.JsonVar.unshift({SubLoc:'Select', Description:'Select'});

but its giving me result like this...

[{"SubLoc":"Select","Description":"Select","Equipment":""}[{"SubLoc":"a","Description":"A","Equipment":""},{"SubLoc":"b","Description":"B","Equipment":""},{"SubLoc":"c","Description":"C","Equipment":""},{"SubLoc":"d","Description":"D","Equipment":""}]]

Your result is not even valid JSON, and there is a superficial . in your call to unshift. Please make sure you fix all the typos in your question! — muenchdo
– muenchdo, Commented Sep 4, 2015 at 16:25

muenchdo · Accepted Answer · 2015-09-04 16:33:51Z

1

The unshift() method returns the new length of the array, and not the array itself. So you must not reassign your result to $scope.JsonVar. Just use it like this:

$scope.JsonVar.unshift({SubLoc:'Select', Description:'Select'});

answered Sep 4, 2015 at 16:33

muenchdo

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muenchdo Over a year ago

Check this JSBin, the code I posted definitely works. Reproduce your problem in a JSBin or similar and add it to your question.

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