how to pass a list in formOutput

I have a bdm with name approverLevelsInfo and attributes 

levelOfApprovers--integer

approvers--string Multiple

minMaxInfoId--integer 

how can I pass the list in form Out.I have tried below code but it shows errors

approverLevelsInfoInput :
    {
        approverLevelsInfoInput.each{
            approverLevelInfoList.add({
            minMaxInfoId :  $data.checkMaxno,
            levelOfApprovers  :  $data.formInput.levelOfApprovers,
            approvers  :  $data.formInput.approvers  
                    })
              }
    }

Please suggest 

Hello,

Where the is the list?

Imagine the list is in $data.approvers, then the Javascript is 

approverLevelsInfoInput : $data.approvers

It's confusing that you give

approverLevelsInfoInput :
{
approverLevelsInfoInput.each{

because you want to create a approverLevelsInfoInput variable from the approverLevelsInfoInput ? 

If you want to generate a list based on approvers and add some information inside, I do in general

var approverLevelsInfoInput  = [];

for (var i in $data.approvers }

{

   var approver = $data.approvers[ i ];

approver.levelOfApprovers = 12;

  approverLevelsInfoInput .push( approver );

}

 

// I don't check this in a JavaScript, I may have some syntax error