Copy Dictionary

[YamadaHideki]

Hello. What do u think about implementing a method that would copy the passed dictionary (possibly nested)?

[cristianbuse]

Hi!

It's a great idea.

It would be straightforward to implement a shallow-copy i.e. first level, because I would only have to copy the internal Vars struct.

I am not sure how this would work for a deep-copy. If the dictionary has nested dictionaries or collections, those would be easy to deep-copy. However, a custom class would be impossible to copy without knowing it's internals.

Maybe you can expand your idea. Thanks!

[cristianbuse]

I won't have time to implement this until next week but I was wondering why do you need this functionality? What kind of purpose does this serve? Thanks!

[YamadaHideki]

It's not urgent, just a whim. We have a customization structure, basically just keys with empty data. And we need copies of the dictionaries, as they will be filled with different data.

[cristianbuse]

Interesting.

I am happening to work on a non-recursive JSON parser for VBA. The parsing bit is done, I am writing tests to comply with RFC 8259. Then will follow the stringifier. I am mentioning this because it would give you the ability to serialize your structure and then just parse and fill with data. Does this apply to you in any way?

[YamadaHideki]

Maybe, if it will be a fast)

[cristianbuse]

Since it's native, it won't be compiled. However, It is already faster than the available parsers and never runs out of stack space, being non-recursive. Will let you know when I publish.

[cristianbuse]

Hi @YamadaHideki ,

You can now use VBA-FastJSON to copy dictionaries. Example:

Dim jsonDict As String:  jsonDict = Serialize(mySourceDict)

Set myTargetDict = Parse(jsonDict).Value

If the structure does not change, you can just store the json string in a constant and init dictionaries from there.