stdx | The missing pieces of Rust 's standard library | Learning library

by skerkour Rust Version: Current License: Non-SPDX

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kandi X-RAY | stdx Summary

stdx is a Rust library typically used in Tutorial, Learning applications. stdx has no bugs, it has no vulnerabilities and it has low support. However stdx has a Non-SPDX License. You can download it from GitHub.

The missing pieces of Rust's standard library.

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stdx has a low active ecosystem.

It has 7 star(s) with 0 fork(s). There are 2 watchers for this library.

It had no major release in the last 6 months.

There are 0 open issues and 1 have been closed. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of stdx is current.

Quality

stdx has no bugs reported.

Security

stdx has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

stdx has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

stdx releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

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stdx Key Features

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stdx Examples and Code Snippets

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Community Discussions

Trending Discussions on stdx

ModuleNotFoundError: No module named 'grad'

Find enclosing rectangle of image object using second moments

How to make a function that uses incomplete type objects

i have data in json format and want to convert it to csv

Different behaviour on mongo 4.0 and 4.2 using mongocxx 3.5

Get OID (types::b_oid) as string in MongoDB C++ driver

Testing mongocxx c++ driver with a sample code

Mongodb c++ regex query

How to compare the "_id" in mongodb via mongocxx?

C++ coroutines: implementing task

QUESTION

ModuleNotFoundError: No module named 'grad'

Asked 2021-May-11 at 19:25

I try to run this Neural Network script (for a regression model) There are two classes defined above. One is Standardizer class and other is Neural Net class. The Standardizer class normalizes all the values and the NeuralNet class builds the neural network that learns the data through feed forward and back propagation.

This function takes the the number of inputs, hidden units, and outputs as the three parameters.

The set_hunit function is used to either update or initiate the weights.It takes the weight as the parameter.

The Pack function packs the multiple weights of each layer into one vector. The unpack function does vice versa.

Forward pass in neural network propagates as shown below:

𝑍𝑌=ℎ(𝑋𝑙⋅𝑉)=𝑍𝑙⋅𝑊

Activation function is used to make the network non linear. We may use tanh or RBG or etc.

In the backward pass the function takes the the z values, Target values and the error as input. Based on the delta value, the weights and the bias are updated accoringly. This method returns the weight vector packed together of that particualr layer. Below are the functions that are excecuted during backward pass.

𝑉𝑊←𝑉+𝛼ℎ1𝑁1𝐾𝑋𝑙⊤((𝑇−𝑌)𝑊⊤⊙(1−𝑍2))←𝑊+𝛼𝑜1𝑁1𝐾𝑍𝑙⊤(𝑇−𝑌)

The train function takes the feautures and the target as the input. The gradientf unpacks the weights,proceeds with the forward pass by calling forward function. Now error is calculated using results of forward pass. Now back propagation is proceeded by calling backward function with parameters as error, Z, T(Target), _lambda.

The optimtarget function tries to reduce the error by using the object function and updates the weights accordingly.

The use method is applied to the test data after training the model. Testing data is passed as parameter and it stadardizes the data. Then forward is applied on the data which returns the predictions

This shows module not found error, but I have installed grad module with pip installation

...

ANSWER

Answered 2021-May-11 at 13:16

Try to open command prompt and type pip install grad or if you using jupyter notebook, make a new code shell and type !pip install grad before you importing it

Hope that solves your problem

Source https://stackoverflow.com/questions/67487449

QUESTION

Find enclosing rectangle of image object using second moments

Asked 2021-Feb-22 at 16:28

My understanding is the second central moment should give me an object's variance. Which I should be able to use as a measure of distribution of pixels from the center of the object, and so I would think I could find the size of the enclosing rectangle of an object using the second moments. Say in Malab I create an image with a white rectangle of dimensions 100x200 and find the center of mass using the first moments, then I calculate the variance

...

ANSWER

Answered 2021-Feb-22 at 16:28

After you've computed your normalized second order central moments, you get a matrix like this:

Source https://stackoverflow.com/questions/66309123

QUESTION

How to make a function that uses incomplete type objects

Asked 2021-Jan-30 at 07:08

I want to make a class one that can build up class two by func1. I have two type of class overloading. The primary template class, and the overloading template specialization class. Primary class one is fine. But class one can not implement func1. The compiler complains return type 'class two' is incomplete, aggregate 'two t' has incomplete type and cannot be defined, and two used in a nested specifier, stdx::shared_future::num_copies_ = 2;. What can I do to make a one version of func1? Thank you.

...

ANSWER

Answered 2021-Jan-30 at 07:08

To avoid errors related to incomplete types the one::func1 method can be defined after two. It can be declared like this:

Source https://stackoverflow.com/questions/65965420

QUESTION

i have data in json format and want to convert it to csv

Asked 2020-Sep-01 at 19:34

#include 
#include 
#include 
#include 
#include 
#include 
#include 

using namespace std;
int main()
{
    ofstream myfile;
    myfile.open("newtest.csv");
    mongocxx::instance instance{};
    mongocxx::uri uri("mongodb://localhost:27017");
    mongocxx::client client(uri);
    mongocxx::database db = client["work"];
    mongocxx::collection coll = db["User"];
    bsoncxx::stdx::optional maybe_result = coll.find_one({});
}

...

ANSWER

Answered 2020-Sep-01 at 19:34

Here's one way to do it. There are a few more bsoncxx::types than I've cared to decode in this example. If you need them, you'll have to add them. This should be enough output your bson data as csv though.

I've put the support functions in a class to support streaming to any std::ostream.

bson_csv_adapter.hpp

Source https://stackoverflow.com/questions/63445236

QUESTION

Different behaviour on mongo 4.0 and 4.2 using mongocxx 3.5

Asked 2020-May-28 at 08:14

The following simple code exhibits different behaviour on mongo 4.2.6 and 4.0

...

ANSWER

Answered 2020-May-28 at 08:14

We've been able to verify that this is a bug in the mongocxx driver. It has been documented here: https://jira.mongodb.org/browse/CXX-2028

Source https://stackoverflow.com/questions/61992970

QUESTION

Get OID (types::b_oid) as string in MongoDB C++ driver

Asked 2020-Jan-28 at 15:58

I'm using MongoDB C++ driver (version 3.4.0 for reference). I need to get the _id of a given document. First, I grab the document:

...

ANSWER

Answered 2020-Jan-28 at 15:58

I think you can call to_string() from the value field:

Source https://stackoverflow.com/questions/59939510

QUESTION

Testing mongocxx c++ driver with a sample code

Asked 2020-Jan-05 at 11:47

I'm trying to connect mongdb with mongocxx driver in my C++ sample code. I added Additional include, Libraries and dependencies. When I build it it shows following error.

this is the full code

...

ANSWER

Answered 2017-Nov-01 at 14:38

It says what it says initialized your driver first. if you have compiled your driver correctly these codes must be working.

Source https://stackoverflow.com/questions/46760393

QUESTION

Mongodb c++ regex query

Asked 2019-Aug-22 at 11:47

How to query MongoDB database using regex in c++.

mongo-cxx-driver-r3.1.1

hear is include

...

ANSWER

Answered 2017-Nov-01 at 07:26

Use some builders and make the document, providing the string input for the pattern:

Source https://stackoverflow.com/questions/47049076

QUESTION

How to compare the "_id" in mongodb via mongocxx?

Asked 2019-May-27 at 20:40

I'm going to build a server, and i have a list containing a struct("_id" is in it), now i want to compare the _id between the exist one in mongodb and the one in instruct.

I've finished the code, and when it comes to compiling, there are two same errors occured:

...

ANSWER

Answered 2019-May-27 at 20:40

The compilation error is caused by doc["_id"] when you're building the document:

Source https://stackoverflow.com/questions/56325446

QUESTION

C++ coroutines: implementing task

Asked 2019-May-13 at 12:59

So, there I'm trying to comprehend that new & complex concept of the coroutines. Took Clang for it, compiling via clang++ -std=c++17 -fcoroutines-ts -stdlib=libc++ goes fine.

One of the most useful concepts is task<> coroutine type, it's mentioned here and even has a couple interesting implementations, by Gor Nishanov and in cppcoro library.

Okay, looked fine to try myself in the simpliest case. So, the goal is to implement something that should work like the following:

...

ANSWER

Answered 2019-May-13 at 12:59

Apparently, the usual suspect was the criminal: specialization! From the standard itself [temp.expl.spec]/7

When writing a specialization, be careful about its location; or to make it compile will be such a trial as to kindle its self-immolation.

To avoid issue, let's make it as simple as possible: task_promise can be a non template and the member specialization is declared as soon as possible:

Source https://stackoverflow.com/questions/56106453

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install stdx

You can download it from GitHub.
Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.

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