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how to make data structures persistent in c++?


how to make data structures persistent in c++?

By : BodyBagz
Date : October 17 2020, 11:12 AM
I hope this helps . Try Google Protocol Buffers or the Boost serialization library.
code :


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Erlang persistent data structures

Erlang persistent data structures


By : user2430081
Date : March 29 2020, 07:55 AM
I hope this helps you . You have misunderstood the situation when you build a list using [H|T]. It is as you say that T is not copied but neither is H. All that happens is that a new list cell is prepended to T with a reference to H as its head (its tail is T). When working with lists the only bits which are created are the actual list cells and never the data in each cell.
The same happens when working with dict. When you modify (add/delete elements) in the dict only the actual dict structure is modified and not the actual data in the dict. Also it is smart so as to only copy as little of the dict structure as is necessary to make the modification.
iOS non-persistent data structures

iOS non-persistent data structures


By : Munish Kapoor
Date : March 29 2020, 07:55 AM
This might help you If you are not interested in persisting the edits (CRUD) for the given information, creating a model to be a representation (template) of your data would be a good choise, for instance:
code :
// of course determining what's the data type of each property is up to you,
// or even giving them an initial value...
struct MyModel {
    var country: String?
    var tollNumber: String?
    var TollFreeNumber: String?
    var TollNumber2: String?
    var ISOCode: String?
}


let containerArray = [MyModel(country: "country", tollNumber: "tollNumber", TollFreeNumber: "TollFreeNumber", TollNumber2: "TollNumber2", ISOCode: "ISOCode"),
                      MyModel(country: "country", tollNumber: "tollNumber", TollFreeNumber: "TollFreeNumber", TollNumber2: "TollNumber2", ISOCode: "ISOCode"),
                      MyModel(country: "country", tollNumber: "tollNumber", TollFreeNumber: "TollFreeNumber", TollNumber2: "TollNumber2", ISOCode: "ISOCode"), ...]
Persistent data structures in c++

Persistent data structures in c++


By : Phil Sanders
Date : March 29 2020, 07:55 AM
like below fixes the issue I rolled my own but there's the immer library as a fairly comprehensive example and it is specifically inspired by clojure. I got all excited and rolled my own a few years back after listening to a speech by John Carmack where he was jumping all over the functional programming bandwagon. He seemed to be able to imagine a game engine revolving around immutable data structures. While he didn't get into specifics and while it just seemed like a hazy idea in his head, the fact that he was seriously considering it and didn't seem to think the overhead would cut steeply into frame rates was enough to get me excited about exploring that idea.
I actually use it as somewhat of an optimization detail which might seem paradoxical (there is overhead to immutability), but I mean in a specific context. If I absolutely want to do this:
Persistent data structures: a persistent index?

Persistent data structures: a persistent index?


By : Wazir Ahmed
Date : March 29 2020, 07:55 AM
Hope that helps You might use some kind of self-balancing binary search tree, just like you might in any other language (although in many languages, such a datastructure is already provided). Each insert costs O(log n) on average, including the rebalancing which will create O(log n) new search nodes.
One fairly simple datastructure is the splay tree. There's a lovely functional implementation of splay trees in Chris Okasaki's Purely Functional Datastructures. In fact, there are lots of really cool datastructures in that book. Highly recommended. (If you search, you might find Okasaki's thesis online, which has the splay tree implementation, too.)
How do persistent data structures help make Om faster

How do persistent data structures help make Om faster


By : Robert Woodcock
Date : March 29 2020, 07:55 AM
I hope this helps . When the app state is stored in a persistent tree structure like a map it's immediately obvious which parts of the state tree didn't change, and don't need updating. This is because any change to a child changes the parent. With mutable data structures changes to the children don't have to change the parents.
So if your state looked like this:
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