The sorted order of keys is an implementation detail of
`PropertyListSerialization` which `JSONSerialization` does not share.
This would require a change in `JSONSerialization`, which is possible,
but out of scope for this work specifically. It would have to go through
review.
[FWIW, the key ordering isn’t changing at random; `JSONSerialization`
writes keys in the order that it receives them (sorted in the order that
`NSDictionary` stores them, based on hash). If you want this to not
interfere with your Git repo (on a more immediate timescale), you can
probably do something like adding a pre-commit Git hook to lint the file
as needed. But I digress, this is totally off-topic.]
On 16 Mar 2017, at 14:57, Ben Rimmington wrote:
Sorry, I actually meant that keys would be ordered **alphabetically**
(as they are with PropertyListSerialization).
I'm storing output from JSONSerialization in a git repository, and
when I add/remove a single key-value the entire file changes, due to
keys being reordered (seemingly at random).
-- Ben
Itai Ferber wrote:
By stable ordering, you mean dictionaries with keys being output in
the order that they were encoded?
Potentially, but this would require additional work as neither Swift
dictionaries nor NSMutableDictionary support this (reasonable seeing
as dictionaries are by definition not sorted), and the current
implementation uses JSONSerialization as the concrete serializer.
Certainly not impossible, though.
On 16 Mar 2017, at 8:49, Ben Rimmington wrote:
<https://github.com/apple/swift-evolution/pull/640>
Could the `JSONEncoder.OutputFormatting.prettyPrinted` case include
the **stable ordering** of keys?
-- Ben
_______________________________________________
swift-evolution mailing list
[email protected]
https://lists.swift.org/mailman/listinfo/swift-evolution
