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kandi X-RAY | Fundamental Summary

Fundamental is a C library. Fundamental has no bugs, it has no vulnerabilities and it has low support. However Fundamental has a Non-SPDX License. You can download it from GitHub.

Since Fundamental is packaged with VCV Rack Pro, we cannot accept pull requests. See Contact VCV Support or open a GitHub issue to request a feature or report a bug.

Support

Quality

Security

License

Reuse

Support

Fundamental has a low active ecosystem.

It has 198 star(s) with 62 fork(s). There are 22 watchers for this library.

It had no major release in the last 6 months.

There are 38 open issues and 85 have been closed. On average issues are closed in 124 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of Fundamental is current.

Quality

Fundamental has 0 bugs and 0 code smells.

Security

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

Fundamental code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

Fundamental 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

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

It has 119 lines of code, 0 functions and 1 files.

It has low code complexity. Code complexity directly impacts maintainability of the code.

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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of Fundamental

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Fundamental Key Features

No Key Features are available at this moment for Fundamental.

Fundamental Examples and Code Snippets

r Calculates the electric power .

python

Lines of Code : 41

License : Permissive (MIT License)

Copy

def electric_power(voltage: float, current: float, power: float) -> tuple:
    """
    This function can calculate any one of the three (voltage, current, power),
    fundamental value of electrical system.
    examples are below:
    >>>

Community Discussions

Trending Discussions on Fundamental

Why is std::aligned_storage to be deprecated in C++23 and what to use instead?

Why do Switch and ListView controls in MAUI not update with 2-way binding?

Why don't types with invalid inheritance get rejected when passed as template parameters?

Adding ADO.Net Entity Framework gives "The project's target framework does not contain Entity Framework runtime assemblies"

What is XlaBuilder for?

Under what notion of equality are typeclass laws written?

Npx hardhat could not determine executable to run

Why does this numeric equation using a cosine produce a different result between a console application and windows application?

How to perform logging in ConfigureServices method of Startup.cs in ASP.NET Core 5.0

How to give certificate to Java Websocket?

QUESTION

Why is std::aligned_storage to be deprecated in C++23 and what to use instead?

Asked 2022-Apr-11 at 14:18

I just saw that C++23 plans to deprecate both std::aligned_storage and std::aligned_storage_t as well as std::aligned_union and std::aligned_union_t.

Placement new'd objects in aligned storage are not particularly constexpr friendly as far as I understand, but that doesn't appear to be a good reason to throw out the type completely. This leads me to assume that there is some other fundamental problem with using std::aligned_storage and friends that I am not aware of. What would that be?

And is there a proposed alternative to these types?

...

ANSWER

Answered 2022-Apr-11 at 14:18

Here are three excerpts from P1413R3:

Background
aligned_* are harmful to codebases and should not be used. At a high level:

Using aligned_* invokes undefined behavior (The types cannot provide storage.)

The guarantees are incorrect (The standard only requires that the type be at least as large as requested but does not put an upper bound on the size.)

The API is wrong for a plethora of reasons (See "On the API".)

Because the API is wrong, almost all usage involves the same repeated pre-work (See "Existing usage".)

On the API
std::aligned_* suffer from many poor API design decisions. Some of these are shared, and some are specific to each. As for what is shared, there are three main problems [only one is included here for brevity]:

Using reinterpret_cast is required to access the value

There is no .data() or even .data on std::aligned_* instances. Instead, the API requires you to take the address of the object, call reinterpret_cast(...) with it, and then finally indirect the resulting pointer giving you a T&. Not only does this mean that it cannot be used in constexpr, but at runtime it's much easier to accidentally invoke undefined behavior. reinterpret_cast being a requirement for use of an API is unacceptable.

Suggested replacement
The easiest replacement for aligned_* is actually not a library feature. Instead, users should use a properly-aligned array of std::byte, potentially with a call to std::max(std::initializer_list) . These can be found in the and headers, respectively (with examples at the end of this section). Unfortunately, this replacement is not ideal. To access the value of aligned_*, users must call reinterpret_cast on the address to read the bytes as T instances. Using a byte array as a replacement does not avoid this problem. That said, it's important to recognize that continuing to use reinterpret_cast where it already exists is not nearly as bad as newly introducing it where it was previously not present. ...

The above section from the accepted proposal to retire aligned_* is then followed with a number of examples, like these two replacement suggestions:

Source https://stackoverflow.com/questions/71828288

QUESTION

Why do Switch and ListView controls in MAUI not update with 2-way binding?

Asked 2022-Apr-11 at 09:33

This question is about two MAUI controls (Switch and ListView) - I'm asking about them both in the same question as I'm expecting the root cause of the problem to be the same for both controls. It's entirely possible that they're different problems that just share some common symptoms though. (CollectionView has similar issues, but other confounding factors that make it trickier to demonstrate.)

I'm using 2-way data binding in my MAUI app: changes to the data can either come directly from the user, or from a background polling task that checks whether the canonical data has been changed elsewhere. The problem I'm facing is that changes to the view model are not visually propagated to the Switch.IsToggled and ListView.SelectedItem properties, even though the controls do raise events showing that they've "noticed" the property changes. Other controls (e.g. Label and Checkbox) are visually updated, indicating that the view model notification is working fine and the UI itself is generally healthy.

Build environment: Visual Studio 2022 17.2.0 preview 2.1
App environment: Android, either emulator "Pixel 5 - API 30" or a real Pixel 6

The sample code is all below, but the fundamental question is whether this a bug somewhere in my code (do I need to "tell" the controls to update themselves for some reason?) or possibly a bug in MAUI (in which case I should presumably report it)?

Sample code

The sample code below can be added directly a "File new project" MAUI app (with a name of "MauiPlayground" to use the same namespaces), or it's all available from my demo code repo. Each example is independent of the other - you can try just one. (Then update App.cs to set MainPage to the right example.)

Both examples have a very simple situation: a control with two-way binding to a view-model, and a button that updates the view-model property (to simulate "the data has been modified elsewhere" in the real app). In both cases, the control remains unchanged visually.

Note that I've specified {Binding ..., Mode=TwoWay} in both cases, even though that's the default for those properties, just to be super-clear that that isn't the problem.

The ViewModelBase code is shared by both examples, and is simply a convenient way of raising INotifyPropertyChanged.PropertyChanged without any extra dependencies:

ViewModelBase.cs:

...

ANSWER

Answered 2022-Apr-09 at 18:07

These both may be bugs with the currently released version of MAUI.

This bug was recently posted and there is already a fix for the Switch to address this issue.

Source https://stackoverflow.com/questions/71810199

QUESTION

Why don't types with invalid inheritance get rejected when passed as template parameters?

Asked 2022-Apr-04 at 23:44

As we all know, classes can't be inherited from fundamental types and from classes that are marked as final. But despite that, the code presented below compiles without any problems on Clang 12 and GCC 9.

...

ANSWER

Answered 2022-Apr-04 at 12:55

The compiler requires that the code be free of syntactic errors. And the sample snippet doesn't have any. Only when you create an Inheriter object can the compiler raise any errors (such as the ones you are expecting)

Source https://stackoverflow.com/questions/71737442

QUESTION

Adding ADO.Net Entity Framework gives "The project's target framework does not contain Entity Framework runtime assemblies"

Asked 2022-Mar-23 at 18:52

I've added a new .Net 6.0 project to my solution in VS2022. Installed the EntityFramework 6.4.4. with install-package entityframework and now try to add a ADO.Net Entity Framework Model to the project. I get an error:

The project's target framework does not contain Entity Framework runtime assemblies. Please review the target framework information on the project's property page.

I've tried adding several other EF packages (which should not be necessary according to the documentation here: https://docs.microsoft.com/en-us/ef/ef6/fundamentals/install). I thought the problem was with my installation but I created a .Net 6.0 console application containing the problem and sent it to a colleague and he got the same message.

Also found this topic here: Adding Entity Framework Model on Visual Studio 2022 but there's no answer there.

Steps to reproduce:

Create a .Net 6.0 Console application.
Install the EF6 package using install-package entityframework from the package manager console window.
Right-click solution and choose 'Add' => 'Add item'.
In the left pane click 'Data'.
Choose 'ADO.Net Entity Framework Model.
Click 'Add'.

The error appears:

...

ANSWER

Answered 2022-Jan-05 at 16:33

The EF 6 tooling onl works on a .NET Framework project, you must add one to your slution and then copy or link to the generated code. In addition, EDMX files in .NET Core projects are not supported, but there are workarounds

Source https://stackoverflow.com/questions/70580916

QUESTION

What is XlaBuilder for?

Asked 2022-Mar-20 at 18:41

What's the XLA class XlaBuilder for? The docs describe its interface but don't provide a motivation.

The presentation in the docs, and indeed the comment above XlaBuilder in the source code

...

ANSWER

Answered 2021-Dec-15 at 01:32

XlaBuilder is the C++ API for building up XLA computations -- conceptually this is like building up a function, full of various operations, that you could execute over and over again on different input data.

Some background, XLA serves as an abstraction layer for creating executable blobs that run on various target accelerators (CPU, GPU, TPU, IPU, ...), conceptually kind of an "accelerator virtual machine" with conceptual similarities to earlier systems like PeakStream or the line of work that led to ArBB.

The XlaBuilder is a way to enqueue operations into a "computation" (similar to a function) that you want to run against the various set of accelerators that XLA can target. The operations at this level are often referred to as "High Level Operations" (HLOs).

The returned XlaOp represents the result of the operation you've just enqueued. (Aside/nerdery: this is a classic technique used in "builder" APIs that represent the program in "Static Single Assignment" form under the hood, the operation itself and the result of the operation can be unified as one concept!)

XLA computations are very similar to functions, so you can think of what you're doing with an XlaBuilder like building up a function. (Aside: they're called "computations" because they do a little bit more than a straightforward function -- conceptually they are coroutines that can talk to an external "host" world and also talk to each other via networking facilities.)

So the fact XlaOps can't be used across XlaBuilders may make more sense with that context -- in the same way that when building up a function you can't grab intermediate results in the internals of other functions, you have to compose them with function calls / parameters. In XlaBuilder you can Call another built computation, which is a reason you might use multiple builders.

As you note, you can choose to inline everything into one "mega builder", but often programs are structured as functions that get composed together, and ultimately get called from a few different "entry points". XLA currently aggressively specializes for the entry points it sees API users using, but this is a design artifact similar to inlining decisions, XLA can conceptually reuse computations built up / invoked from multiple callers if it thought that was the right thing to do. Usually it's most natural to enqueue things into XLA however is convenient for your description from the "outside world", and allow XLA to inline and aggressively specialize the "entry point" computations you've built up as you execute them, in Just-in-Time compilation fashion.

Source https://stackoverflow.com/questions/70339753

QUESTION

Under what notion of equality are typeclass laws written?

Asked 2022-Feb-26 at 19:39

Haskell typeclasses often come with laws; for instance, instances of Monoid are expected to observe that x <> mempty = mempty <> x = x.

Typeclass laws are often written with single-equals (=) rather than double-equals (==). This suggests that the notion of equality used in typeclass laws is something other than that of Eq (which makes sense, since Eq is not a superclass of Monoid)

Searching around, I was unable to find any authoritative statement on the meaning of = in typeclass laws. For instance:

The Haskell 2010 report does not even contain the word "law" in it
Speaking with other Haskell users, most people seem to believe that = usually means extensional equality or substitution but is fundamentally context-dependent. Nobody provided any authoritative source for this claim.
The Haskell wiki article on monad laws states that = is extensional, but, again, fails to provide a source, and I wasn't able to track down any way to contact the author of the relevant edit.

The question, then: Is there any authoritative source on or standard for the semantics for = in typeclass laws? If so, what is it? Additionally, are there examples where the intended meaning of = is particularly exotic?

(As a side note, treating = extensionally can get tricky. For instance, there is a Monoid (IO a) instance, but it's not really clear what extensional equality of IO values looks like.)

...

ANSWER

Answered 2022-Feb-24 at 22:30

Typeclass laws are not part of the Haskell language, so they are not subject to the same kind of language-theoretic semantic analysis as the language itself.

Instead, these laws are typically presented as an informal mathematical notation. Most presentations do not need a more detailed mathematical exposition, so they do not provide one.

Source https://stackoverflow.com/questions/71258709

QUESTION

Npx hardhat could not determine executable to run

Asked 2022-Feb-16 at 02:34

I am trying to follow this guide and I am struggling running hardhat. After following the commands in the article:

...

ANSWER

Answered 2021-Dec-25 at 19:44

I had the same issue then it worked for me by specifying the latest version of hardhat during the install, eg.:

Source https://stackoverflow.com/questions/70477127

QUESTION

Why does this numeric equation using a cosine produce a different result between a console application and windows application?

Asked 2022-Feb-12 at 13:17

I write a mathematical function to be benchmark function in my optimization algorithm.

...

ANSWER

Answered 2022-Feb-12 at 13:14

In the platform that produces “-4,09139395927863E+154”, the Math.Cos routine is broken. It apparently uses a processor instruction that does not support operands outside [−2⁻⁶³, +2⁻⁶³].

Since I do not use C#, here is a C program that reproduces the correct behavior:

Source https://stackoverflow.com/questions/71090136

QUESTION

How to perform logging in ConfigureServices method of Startup.cs in ASP.NET Core 5.0

Asked 2022-Feb-12 at 09:53

Constructor injection of a logger into Startup works in earlier versions of ASP.NET Core because a separate DI container is created for the Web Host. As of now only one container is created for Generic Host, see the breaking change announcement.

Startup.cs

...

ANSWER

Answered 2021-Oct-05 at 16:00

If you are using NLog the easiest way to log in you startup.cs is to add private property.

Source https://stackoverflow.com/questions/68518223

QUESTION

How to give certificate to Java Websocket?

Asked 2022-Jan-20 at 10:33

Forgive me for the newb question, but I am confused and obviously not understanding the fundamentals or explanations of how to use a Websocket server hosted over HTTPS. Everything I find online leads me to have more questions than answers.

I have a Websocket server hosted on my HTTPS website using Java code.

This is my WebsocketServer.java file:

...

ANSWER

Answered 2022-Jan-13 at 14:50

Keep it easy.
Certs inside your application are complex - they are hard to manage and you will get problems to run your application in a modern cloud environment (start new environments, renew certs, scale your application, ...).

Simple conclusion: Dont implement any certs.

How-to get encrypted connections?

As Mike already pointed out in the comments: WebSockets are just upgraded HTTP(S) connections. A normal webserver (nginx, apache) takes care about the certs. It can be done in kubernetes (as ingress-controller) or with a "bare-metal" webserver.
Both of them should act as a reverse-proxy. This means: Your java-application doesn't know anything about certs. It has just unencrypted connections - like in your code on port 6868.
But the client will not use this port. 6868 is only internally reachable.

The client will call your reverse-proxy at the normal HTTPS port (=443). The reverse-proxy will forward the connection to your java-application.

Here some links for further information:

Source https://stackoverflow.com/questions/70654559

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

Vulnerabilities

No vulnerabilities reported

Install Fundamental

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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