SMT | Sparse Merkle TreeEfficient Merkle proof verification | Hashing library
kandi X-RAY | SMT Summary
kandi X-RAY | SMT Summary
Sparse Merkle Tree
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Top functions reviewed by kandi - BETA
- Update updates the key and values .
- NewSMT returns a new SMT object .
- Hasher returns the sha256 hash of the given data .
- bitSplit splits bits in bits .
- bitSet sets bit i to i .
- bitIsSet returns whether the bit at i is set .
- bitUnSet unsets bit at index i
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Trending Discussions on SMT
QUESTION
I want to make generic function for adding items to an array. I also want it to be type secured with intellisence etc.
I made smt like this:
...ANSWER
Answered 2021-Jun-02 at 14:36This is fundamentally not something the TypeScript compiler can verify as safe. Each of type and data are of a union type, but the compiler will not be able to understand whether or not these unions are correlated; it will treat them as independent, and so it imagines that type might be "one" while data is ITwo, and complains that this is not safe to do.
There is an open issue at microsoft/TypeScript#30581 asking for support for dealing with such correlated unions, but it's mostly a warehouse to document when people run into the problem and to mention that the best thing to do is just to use a type assertion and move on.
The particular overload implementation you write actually is not type safe, since the implementation signature explicitly says that type and data are uncorrelated unions:
QUESTION
I have a data frame which has 86 columns. There are columns with prefixes such as name_smt1, name_smt2, ..., status_smt1, status_smt2,..., grade_smt1, grade_smt2,... and so. Other columns are subjects, and there are more than 40 subjects columns with different names. I also have this one column named grade_t which I use as a parameter whether I will fill all the subjects columns those contain with D or no. If the column grade_t in a row is null then all of subjects columns (which is null) will be filled with D. I'm trying to do it like this but it raised error saying ValueError: shape mismatch: value array of shape (7,4) could not be broadcast to indexing result of shape (7,) is there any way to do this without the code below? I have been working on this for 2 days, I have tried looping over it but it resulting in filling all of subjects with D even when the IP_t is not null
ANSWER
Answered 2021-Jun-01 at 05:18So if I understand your problem correctly, given input
QUESTION
I'm trying to classify a text to a 6 different classes. Since I'm having an imbalanced dataset, I'm also using SMOTETomek method that should synthetically balance the dataset with additional artificial samples.
I've noticed a huge score difference when applying it via pipeline vs 'Step by step" where the only difference is (I believe) the place I'm using train_test_split
Here are my features and labels:
...ANSWER
Answered 2021-May-29 at 13:28There is nothing wrong with your code by itself. But your step-by-step approach is using bad practice in Machine Learning theory:
Do not resample your testing data
In your step-by-step approach, you resample all of the data first and then split them into train and test sets. This will lead to an overestimation of model performance because you have altered the original distribution of classes in your test set and it is not representative of the original problem anymore.
What you should do instead is to leave the testing data in its original distribution in order to get a valid approximation of how your model will perform on the original data, which is representing the situation in production. Therefore, your approach with the pipeline is the way to go.
As a side note: you could think about shifting the whole data preparation (vectorization and resampling) out of your fitting and testing loop as you probably want to compare the model performance against the same data anyway. Then you would only have to run these steps once and your code executes faster.
QUESTION
I'm new to z3 smt solver.I'm using the python API z3py.
I have a quick question concerning the output of the z3.solve() function.what does it mean when I call z3.solve() on some constraints and I get [] as an output? Also could someone refer me to a good documentation please
...ANSWER
Answered 2021-May-26 at 15:31You really need to provide an input that causes this, as it really depends on your constraints. But here's the simplest way to illustrate this behavior:
QUESTION
Currently I'm working with STM32F303ZET6 (with Nucleo development board) in a university project. We also need to make an all SMT PCB including the microcontroller. The problem we have is we can't find SMT verison of STM32F303ZET6 in our country.
So we have to change our microcontroller but currently STM32F303ZET6 is all I got and I'll write all of the code with it. I'm planning to use arm mbed for the libraries and development environment. My question is can I use same codes I wrote for STM32F303ZET6 for some other STM32F3 or STM32F4 microcontroller?
...ANSWER
Answered 2021-May-25 at 19:56There is a great deal of commonality between STM32F2, STM32F3 and STM32F4 series. Both F3 and F4 are Cortex-M4 and all three series share common peripherals. In some cases you may find pin-multiplexing options differ, or there are certain peripherals available in one part but not the other.
Different parts may have a different number of USARTs, ADCs, DACs etc. And differing number of available GPIOs. So you should check that the peripherals and ports you use are available on the alternate part.
It is really a matter of going through the data sheet and comparing the function, capabilities and pin-out options for the parts. If you are using the STM32Cube you should have few compatibility issue (Cube has other issues but cross-part compatibility is its main purpose).
The clock trees for each part tend to differ, so you will need part specific C runtime start-up code, but that is normally provided by the toolchain.
QUESTION
Hi can anyone help why I am getting AttributeError: 'SMOTE' object has no attribute 'fit_sample' error? I don't think this code should cause any error? Thanks
...ANSWER
Answered 2021-Feb-25 at 07:56If you import like this
QUESTION
I am quite sure that it should be possible to describe tuples using SMT-lib syntax, especially for the Z3 solver. However, I can't really find a way of doing so. The only thing I found is this documentation page, but I don't get how to use it in z3 -in.
My struggles so far:
...ANSWER
Answered 2021-May-21 at 12:08Your link points to the OCAML API, i.e. this has nothing to do with SMT. Tuples are a special case of datatypes, for which there is a section in the Z3 Guide.
QUESTION
I'm working on a Spring/React project where I have about 10 tables, which hold several relations.
But I got a really annoying situation where I just can't find the right solution. I have a few tables which hold one2many relations:
...ANSWER
Answered 2021-May-17 at 20:47Well when you send POST query with your JSON, Jackson converts that JSON to Product object. And since Product has not fields like manufacturerId or categoryId, Jackson ignores them.
And no wonder category and manufacturer fields are null - JSON has no such fields.
You should make a class ProductDto with same fields as Product except for it should have manufacturerId and categoryId instead of manufacturer and. And you should convert ProductDto to Product manually in your code, filling category with categoryId and manufacturer with manufacturerId. This is the right way.
Another option is to add full Manufacturer and Categoty object to your JSON
QUESTION
I tried tracking if people on the bots guild change activities (like starting to play a game)
After reading the javadoc I found out:
- GatewayIntent.GUILD_PRESENCES
- CacheFlag.ACTIVITY
- MemberCachePolicy.ONLINE (therefore GatewayIntent.GUILD_MEMBERS)
must be active.
so thats my Main:
...ANSWER
Answered 2021-May-17 at 01:22the UserUpdateActivitiesEvent requires the GuildPresence intent to be enabled. You enabled it in your code, but it has to also be enabled on the discord api website at https://discord.com/developers/applications -> Your Application -> Bot -> Enable Presence Intent
QUESTION
I am getting the title error in my Nginx server log. I have checked the many other similarly asked questions without success. The php script works as intended but the error keeps appearing everytime the page is hit.
Here's the affected code:
...ANSWER
Answered 2021-May-15 at 15:24Check your result array before accessing..
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