If you've got the selected vendor object, you can do something like this to create the desiredArray
.
var desiredArray = [];
var selectedVendor = originalArray[2]; // this is the vendor you got via .filter
for(property in selectedVendor) {
if(property !== 'vendor') {
desiredArray.push({fruitName: property, qty: selectedVendor[property]});
}
}