Question about Arrays in JSON
- When creating a JSON structure, is there a standard way that
is used to determine that some member should be an Array vs Not?
For someone building a service, if there is only one item do they
output an Array? How does one make that decision from the service side?
Do simply have to follow whatever schema you want, and make all clients aware?
Do different JSON seriliazation techniqunes handle this in different ways?
- sean_snider scripsit:
> When creating a JSON structure, is there a standard way thatI don't know that there is. My take on it is: if something *can*
> is used to determine that some member should be an Array vs Not?
appear multiple times, it should always be an array. If it cannot,
it should never be an array.
For example, a message might have a sender and one or more recipients.
Since the sender is unique, it should not be an array. The recipients
should always be an array, even if there is just one recipient (and even
if that is the typical case).
Sticking to this rule makes uniform access easy: a client can always
iterate over the array rather than having to have a special case in the
code for a non-array. The cost is only 2 characters on the wire.
John Cowan <cowan@...> http://ccil.org/~cowan
Micropayment advocates mistakenly believe that efficient allocation of
resources is the purpose of markets. Efficiency is a byproduct of market
systems, not their goal. The reasons markets work are not because users
have embraced efficiency but because markets are the best place to allow
users to maximize their preferences, and very often their preferences are
not for conservation of cheap resources. --Clay Shirkey