piscina | A fast , efficient Node.js Worker Thread Pool implementation | Reactive Programming library

by piscinajs TypeScript Version: 4.4.0 License: Non-SPDX

X-Ray Key Features Code Snippets(1)Community Discussions(8)Vulnerabilities Install Support

kandi X-RAY | piscina Summary

piscina is a TypeScript library typically used in Programming Style, Reactive Programming, Nodejs applications. piscina has no bugs, it has no vulnerabilities and it has medium support. However piscina has a Non-SPDX License. You can download it from GitHub.

For Node.js 12.x and higher.

Support

Quality

Security

License

Reuse

Support

piscina has a medium active ecosystem.

It has 3233 star(s) with 78 fork(s). There are 26 watchers for this library.

There were 5 major release(s) in the last 12 months.

There are 33 open issues and 79 have been closed. On average issues are closed in 272 days. There are 16 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of piscina is 4.4.0

Quality

piscina has 0 bugs and 0 code smells.

Security

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

piscina code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

piscina 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

piscina releases are available to install and integrate.

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

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piscina Key Features

No Key Features are available at this moment for piscina.

piscina Examples and Code Snippets

Error when do Promise.all (close connection / hang up)

JavaScript

Lines of Code : 41

License : Strong Copyleft (CC BY-SA 4.0)

Copy

const path = require('path')
const _ = require('lodash')
const Pool = require('piscina')
const BB = require('bluebird')

const workerPool = new Pool({
    filename: path.resolve(__dirname, 'worker.js'),
})

const generateData = (numItems =

Community Discussions

Trending Discussions on piscina

Scraping links from a web page at a specific position

rowwise apply rvest html_nodes() and store in a new column the output

receive in flask json converted and form data

Element arcticle not allowed as child of element main in this context

Most efficient way to use Node.js PM2 clustering and Node.js worker_threads module at the same time?

How to remove whitespace around elements in a XSLT file?

Argument 1 passed to Illuminate\Database\Grammar::parameterize() must be of the type array, string given, called in Laravel

How to organize items of a list into columns using CSS?

QUESTION

Scraping links from a web page at a specific position

Asked 2022-Apr-11 at 22:49

I am trying to collect a number of links from a website.

For example I have the following and my idea was to collect the link where it says leer más which is where I get the xpath from.

...

ANSWER

Answered 2022-Apr-10 at 12:15

Those links are stored inside a JavaScript object within a script tag. You can regex out the string defining that object, do some unescapes to enable jsonlite to parse, then apply a custom function to extract just the urls of interest to the json object

Source https://stackoverflow.com/questions/71809099

QUESTION

rowwise apply rvest html_nodes() and store in a new column the output

Asked 2022-Apr-09 at 21:09

I have some urls that I would like to scrape. I end up with 3 data frames (for example):

...

ANSWER

Answered 2022-Apr-09 at 21:09

We may use rowwise, check if the value in 'class' is non NA, apply the code and create a list column (else return NA)

Source https://stackoverflow.com/questions/71811527

QUESTION

receive in flask json converted and form data

Asked 2022-Feb-11 at 00:54

I have a API in flask. The objetive is to receive a converted csv file (function in javascript) and form data in flask separate. Form data is metadata and csv file converted to json is data. I'm only getting the form data, the json file i'm getting none.

My json converted from csv file it's store in variable result and form data is stored in formdata. I send the two variable separated. I'm receiving all the data that i insert in HTML. The JSON that result from a function that convert csv files to json i'm not getting in flask side.

...

ANSWER

Answered 2022-Feb-11 at 00:54

A data transfer can only conform to one format. This formatting is either an encoding for a form or corresponds to JSON formatting.

You can still send the data within one request. Either you add the JSON-formatted data as a field to the form, or you convert the form data into a JSON structure.

With the first variant, it is necessary to read the JSON data manually on the server side. You can use the python json library for this. For the latter, the framework does this work.
A third option is to transfer the file within the form and simply read it on the server side.

Whichever option you choose, don't forget to validate the inputs.

In the following example, all form data is converted to JSON and sent to the server. I shortened the code a bit for clarity.
The version of adding JSON formatted data to the form data should be self-explanatory.
I think the best solution is to read the file server side.

Source https://stackoverflow.com/questions/71071396

QUESTION

Element arcticle not allowed as child of element main in this context

Asked 2021-Oct-09 at 00:02

I have this code and I'm using this HTML validator to check it: https://validator.w3.org

When I've put this code through it, one error that appeared was: Element arcticle not allowed as child of element main in this context which I don't really understand.

This is my code:

...

ANSWER

Answered 2021-Oct-09 at 00:02

Here's the full error message from validator.w3.org:

Source https://stackoverflow.com/questions/69502728

QUESTION

Most efficient way to use Node.js PM2 clustering and Node.js worker_threads module at the same time?

Asked 2021-Jan-21 at 22:00

I'm using PM2 cluster module to spawn an instance of my Node.js application for each one of my CPU cores. At the sime time, for CPU-heavy operations (like crypto) I'm using Piscina (a worker pool library module for Node.js, which is based on Node.js worker threads module).

Basically, I create a Piscina instance with some worker threads and call it for crypto operations everytime I hit an specific API.

Could this be unefficient in terms of memory usage, given that I create a worker pool for each one of my app instances? What is the most efficient way to use worker threads and Node.js cluster module at the same time?

...

ANSWER

Answered 2021-Jan-21 at 22:00

The short answer is yes, there is an ineffective memory usage if you are using PM2 or Cluster module as they use process forking instead taking advantages of multithreading.

In your case, the problem is that the worker pool is being created inside the app instance which may lead to some ineffectiveness in memory usage(I think it maybe negligible if pool is configured adequately taking into consideration app instances). You may create another separate node simple app just for handling crypto tasks like a microservice and start it before running app cluster. The cluster workers may communicate with it through some IPC message protocol or better use GRPC/REST.

Source https://stackoverflow.com/questions/65834945

QUESTION

How to remove whitespace around elements in a XSLT file?

Asked 2020-Sep-28 at 12:03

Essentially, I'm struggling with the same XSLT problem as another questioner asking on this site, namely the user "bigsky" in a post of 2013 (s. Trim white-spaces at the end of lines only before a specific tag). But in spite of a useful hint (in the answer of Sperberg-McQueen), I couldn't figure out a satisfying solution for the issue.
What I'm trying to do is, transforming an XML file into a readable HTML document, to create a running "body" text and recombine at line breaks the strings of words divided, that is interrupted by an element, in my original document - but recombine them without whitespaces!
Having played around with several templates in my XSLT stylesheet, I defined one - following the hint of the post mentioned above - to process all nodes preceding a element, and I tried to remove their leading and trailing whitespaces making use of the normalize-space() function, so that the strings preceding and following the specified nodes should be concatenated in the output.
Now, for the most part of the cases, I've actually got the output I desired - however, in some places appears (to my surprise) whitespace before the re-concatenated string, which has no counterpart in my XML file and which I would like to get rid of.

As the relevant files deal with a document of a certain length, I'll show you only extracts of the code - but I'll include parts where the transformation works as wanted, as well as parts where the transformation produces unexpected whitespace.
Concerning the text document at issue, just a brief note for your information: The XML file covers the text of a medieval Latin manuscript according to conventions of the Text Encoding Initiative (TEI) and is, among other things, intended to record palaeographic features of the manuscript (- in case you wonder about the tags/elements I've used). Actually, I'd like to ask you to have a look primarily at the sections around the elements and ignore the details of my text encoding - but at the same time I wanted to show you the selected passages as they appear in my edition (not least because I'm unsure as to the role of adjacent elements ...).

--> Extract from the XML file:

...

ANSWER

Answered 2020-Sep-28 at 10:18

I would try with or perhaps make sure you use a well defined inline element like span instead of seg.

Source https://stackoverflow.com/questions/64093614

QUESTION

Argument 1 passed to Illuminate\Database\Grammar::parameterize() must be of the type array, string given, called in Laravel

Asked 2020-Jun-25 at 16:57

Good I have a raw and I am creating a property and this property has characteristics, that the user selects by a check box, I would like to know how to save the set of check boxes selected in my characteristics table with the property id

Controller

...

ANSWER

Answered 2020-Jun-25 at 01:46

Seems like your $request->input('characteristic'); is an array instead of string.

You need a loop to solve this problem. One way can be:

Source https://stackoverflow.com/questions/62565983

QUESTION

How to organize items of a list into columns using CSS?

Asked 2020-May-15 at 23:47

How to organize a list of items into 4 columns using only CSS?

Like this: https://imgur.com/a/mPdNnNi

Here is my code:

...

ANSWER

Answered 2020-May-15 at 23:47

Often, those little lists are 4 seperate lists. This is useful for different layout reasons / and also to group like items. So, consider that as an option - but for true columns - you can use https://developer.mozilla.org/en-US/docs/Web/CSS/columns

Source https://stackoverflow.com/questions/61830041

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

Vulnerabilities

No vulnerabilities reported

Install piscina

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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