var recordCollection = { 2548: { albumTitle: 'Slippery When Wet', artist: 'Bon Jovi', tracks: ['Let It Rock', 'You Give Love a Bad Name'] }, 2468: { albumTitle: '1999', artist: 'Prince', tracks: ['1999', 'Little Red Corvette'] }, 1245: { artist: 'Robert Palmer', tracks: [] }, 5439: { albumTitle: 'ABBA Gold' } }; // Only change code below this line function updateRecords(records, id, prop, value) { if (prop!= 'tracks' && value!='') { records[id][prop]=value; }else if (prop==='tracks' &&records[id].hasOwnProperty('tracks')===false) { record[id][prop]=[value]; }else if(prop==='tracks' &&value!="") { records[id][prop].push(value); }else if(value==="") { delete records[id][prop]; } return records }
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