When parsing an array from url query params, such as
r.ParseForm() which calls
parseQuery(), is there a guarantee (whether in go/url or http spec) that the order of the array will be preserved, i.e.
id = [1,2,3] will always be returned?
parseQuery code at the moment will preserve the order but if it’s not guaranteed there is a chance (minuscle or not) that it will change in the future.
I think parsing them out of order would break the semantics of parameter passing. So my opinion is that you are OK here.
Go has a Go 1 compatibility guarantee that likely covers this.
Go 1 and the Future of Go Programs
If it’s essential that this behavior is invariant, add a test that verifies that the invariant holds. If it no longer holds, fail the test with a fatal error.
Thanks both, I think that answered the question
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