Iterate And Map Json In Array Using Javascript

I'am struck here that mapping a JSON in a array. Here I have mentioned JSON array. [ { '_id':{ '$oid':'51d84a1e07121c7f442a6e76' }, '_type':[ 'App_Model_Playlist_Content_Heading',

Solution 1:

You should iterate over JSON array, and create a new entry either if you faces an App_Model_Playlist_Content_Heading or the currentObj is null, thus, it has no heading, like this

    var array = [],
    currentObj,
    pushNew = function(header, narrative, resourceId) {
        var newObj = {
           header: header || '',
           narrative: narrative || '',
           resource_id: resourceId? [resourceId] : []
        };

        array.push(newObj);

        return newObj;
    }
;

for(var i=0; i < aa.length; i++){
    // Starting of a new entry
    if(aa[i]._type[0]=='App_Model_Playlist_Content_Heading'){
       currentObj = pushNew(aa[i].text);
    }

   if(aa[i]._type[0]=='App_Model_Playlist_Content_Narrative'){

       if(!currentObj) {
          currentObj = pushNew(null, aa[i].text);
       } else {
          currentObj.narrative = aa[i].text;
       }
    }

   if(aa[i]._type[0]=='App_Model_Playlist_Content_Resource'){
      if(typeof aa[i].resource !== 'undefined' && aa[i].resource != null && aa[i].resource !==''){

              if(!currentObj) {
                 currentObj = pushNew(null, null, aa[i].resource.$id.$oid);
              } else {
                 currentObj.resource_id.push(aa[i].resource.$id.$oid);
              }
          }

   }
}

console.log(JSON.stringify(array));