Hence | oriented programming language with an English-like syntax | Runtime Evironment library

by ajbkr C Version: Current License: No License

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kandi X-RAY | Hence Summary

Hence is a C library typically used in Server, Runtime Evironment, Nodejs applications. Hence has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Hence is an experimental stack-oriented programming language with an English-like syntax.

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Support

Hence has a low active ecosystem.

It has 9 star(s) with 1 fork(s). There are 1 watchers for this library.

It had no major release in the last 6 months.

Hence has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of Hence is current.

Quality

Hence has no bugs reported.

Security

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

License

Hence does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

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

Installation instructions, examples and code snippets are available.

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Hence Key Features

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Hence Examples and Code Snippets

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Community Discussions

Trending Discussions on Hence

Does opening a file in a child process create a separate entry in the system open file table in the kernel?

Can't integrate simple normal distribution in sympy, depending on mean and deviation constants

Filter dictionary whose values are arrays

How to thread a generator

How to create a dataframe with data from JSON output

Count the number of how often a number occurs across list elements

Exposing business classes from business library in Google Apps Script

Dealing with slow Electron startup

TranslationFile is only using the target-language

String Format Specifier outputs whole String even though char array size is limited

QUESTION

Does opening a file in a child process create a separate entry in the system open file table in the kernel?

Asked 2021-Jun-15 at 23:17

I understand that after calling fork() the child process inherits the per-process file descriptor table of its parent (pointing to the same system-wide open file tables). Hence, when opening a file in a parent process and then calling fork(), both the child and parent can write to that file without overwriting one another's output (due to a shared offset in the open-file table entry).

However, suppose that, we call open() on some file after a fork (in both the parent and the child). Will this create a separate entries in the system-wide open file table, with a separate set of offsets and read-write permission flags for the child (despite the fact that it's technically the same file)? I've tried looking this up and I don't seem to be able to find a clear answer.

I'm asking this mainly since I was playing around with writing to files, and it seems like only one the outputs of the parent and child ends up in the file in the aforementioned situation. This seemed to imply that there are separate entries in the open file table for the two separate open calls, and hence separate offsets, so the slower process overwrites the output of the other process.

To illustrate this, consider the following code:

...

ANSWER

Answered 2021-May-03 at 20:22

There is a difference between a file and a file descriptor (FD).

All processes share the same files. They don't necessarily have access to the same files, and a file is not its name, either; two different processes which open the same name might not actually open the same file, for example if the first file were renamed or unlinked and a new file were associated with the name. But if they do open the same file, it's necessarily shared, and changes will be mutually visible.

But a file descriptor is not a file. It refers to a file (not a filename, see above), but it also contains other information, including a file position used for and updated by calls to read and write. (You can use "positioned" read and write, pread and pwrite, if you don't want to use the position in the FD.) File descriptors are shared between parent and child processes, and so the file position in the FD is also shared.

Another thing stored in the file descriptor (in the kernel, where user processes can't get at it) is the list of permitted actions (on Unix, read, write, and/or execute, and possibly others). Permissions are stored in the file directory, not in the file itself, and the requested permissions are copied into the file descriptor when the file is opened (if the permissions are available.) It's possible for a child process to have a different user or group than the parent, particularly if the parent is started with augmented permissions but drops them before spawning the child. A file descriptor for a file opened in this manner still has the same permissions uf it is shared with a child, even if the child would itself be able to open the file.

Source https://stackoverflow.com/questions/67375028

QUESTION

Can't integrate simple normal distribution in sympy, depending on mean and deviation constants

Asked 2021-Jun-15 at 19:02

So... I can sympy.integrate a normal distribution with mean and standard deviation:

...

ANSWER

Answered 2021-Jun-15 at 01:38

Here's a close case that works:

Source https://stackoverflow.com/questions/67978829

QUESTION

Filter dictionary whose values are arrays

Asked 2021-Jun-15 at 18:35

I have data which looks like this:

...

ANSWER

Answered 2021-Jun-15 at 18:35

import numpy as np

features_dict = {
    'feat1': np.array([[0,1],[2,3],[4,5]]), 
    'feat2': np.array([[6,7],[8,9],[10,11]]),
    'feat3': np.array([1, 0, 0]),
    'feat4': np.array([[1],[2],[1]])
}

ind = features_dict['feat3'] == 0
features_dict = {k: v[ind] for k,v in features_dict.items()}

Source https://stackoverflow.com/questions/67991514

QUESTION

How to thread a generator

Asked 2021-Jun-15 at 16:02

I have a generator object, that loads quite big amount of data and hogs the I/O of the system. The data is too big to fit into memory all at once, hence the use of generator. And I have a consumer that all of the CPU to process the data yielded by generator. It does not consume much of other resources. Is it possible to interleave these tasks using threads?

For example I'd guess it is possible to run the simplified code below in 11 seconds.

...

ANSWER

Answered 2021-Jun-15 at 16:02

Send your data to separate processes. I used concurrent.futures because I like the simple interface.

This runs in about 11 seconds on my computer.

Source https://stackoverflow.com/questions/67958976

QUESTION

How to create a dataframe with data from JSON output

Asked 2021-Jun-15 at 12:09

I've used a web API to import data from a specific website. I was able to import the data in JSON format. I am very new to python, hence finding hard to transform it to a tabular format which I can use it for my data analysis. Here's my sample code;

...

ANSWER

Answered 2021-Jun-15 at 12:09

Is it what you expect?

Source https://stackoverflow.com/questions/67983180

QUESTION

Count the number of how often a number occurs across list elements

Asked 2021-Jun-15 at 10:35

Assume I have a list containing 5 vectors filled with integers between 1 and d, where d can be any integer

...

ANSWER

Answered 2021-Jun-15 at 10:35

You could use vapply to do this (assuming you want a vector of integers):

Source https://stackoverflow.com/questions/67984381

QUESTION

Exposing business classes from business library in Google Apps Script

Asked 2021-Jun-15 at 10:30

So, I am working on an MVVM-based core SDK for use any time I am developing some Google Apps Script based software, called OpenSourceSDK. It contain core business logic, including base classes to extend. For example, the file Models/BaseModel.gs in it is defined to be:

...

ANSWER

Answered 2021-Jun-13 at 22:53

I was able to get it resolved, but the solution is...hacky.

So, apparently, Google Apps Script exports only what is in globalThis of a project: just the functions and variables. No classes, no constants, ...

Probably has a lot to do with how ES6 works, with its globalThis behavior. One can see that in action, by creating a dummy function, a dummy variable, and a dummy class in their local developer console:

Source https://stackoverflow.com/questions/67954208

QUESTION

Dealing with slow Electron startup

Asked 2021-Jun-15 at 08:10

Context

I have spent some hours playing with Electron and I have observed that it consistently takes more than 2.5 seconds to draw a trivial html file to the screen. The timeline is roughly as follows:

60 ms: app ready event is triggered; we create a window using new BrowserWindow()
170 ms: a blank window appears on the screen
2800 ms: the window shows the specified HTML

I have set up a repository with my code, which is derived from Electron's quick start docs.

Regarding my machine, I am running Windows 10 on a ThinkPad T460 from 2016 with a SSD and enough memory.

Questions

Shipping an application that shows a blank window for so long upon startup is a no-go for me. I assume most people developing Electron apps think similarly. Hence my first question: am I doing something wrong? Or is this the expected loading time for a trivial Electron app?

Assuming this is normal behavior, what is the common way to deal with this problem? Some ideas come to mind:

Asking Electron to show a splash screen: unless there is specific built-in functionality for this, it seems like a no-go, since the splash screen itself would be shown only after 2.5 seconds.
Hide the app's window until it is rendered (using the ready-to-show event), so no blank window is shown. This isn't ideal, since it means that the user doesn't get any feedback whatsoever that the application is actually loading.
Create a wrapper application (using native code) that displays a splash screen, launches electron and hides itself once the electron window is shown. Kind of defeats the purpose of using Electron in the first place, because you end up writing native code and adding accidental complexity.
Setting the background color of the window to something resembling your app, as suggested by the docs. This just doesn't look very well.

Given this must be a common problem, I hope standard solutions have been found by the community. I'd be glad if someone can point me in the right direction.

...

ANSWER

Answered 2021-Jun-14 at 02:38

What if you hid your window until it's ready to show, then show your window, and while your window's hidden show a loading spinner.

First only show your main window until after it's ready:

Source https://stackoverflow.com/questions/67874431

QUESTION

TranslationFile is only using the target-language

Asked 2021-Jun-15 at 06:38

I developed an app in german (de-DE) and in order to translate the captions, I added the TranslationFile feature in my app.json.

This generates a translation file, where the source-language is "en-US":

Not thinking much about it, I changed the source-language to "de-DE" since my captions are in german and I want them to be translated to english.

Hence:

The problem that I now have, is that when I publish my extension and switch between english and german as my language in business central, all I get are the english captions.

...

ANSWER

Answered 2021-Jun-15 at 06:38

The source language will always be "en-US" meaning translations will be from English (United States) to some other language.

The captions in your source code thus needs to be in English (United States) and then you add the translation file for the german language.

Source https://stackoverflow.com/questions/67967434

QUESTION

String Format Specifier outputs whole String even though char array size is limited

Asked 2021-Jun-15 at 06:04

Following is the code :

...

ANSWER

Answered 2021-Jun-15 at 06:04

The function scanf() is not for the faint of heart to use. Studying the documentation is important; e.g. https://en.cppreference.com/w/c/io/fscanf .

If you expect it to only read at most a certain number of letters, which is wise for the obvious reasons you just found out (i.e. UB, buffer overflow vulnerabilities, the works, see the comment and link by kaylum), then you need to tell it explicitly to do so.

You can do so like this

Source https://stackoverflow.com/questions/67980431

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

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The experimental Hence compiler, hence, is currently written in PHP for ease of prototyping. Use chmod on UNIX-like platforms to make hence executable.

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