npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@rxjs-ninja/rxjs-array

v6.0.4

Published

Operators for RxJS for filtering with boolean logic

Downloads

880

Readme

RxJS Ninja - Arrays

The RXJS Ninja Logo

rxjs-array

Website | API Documentation | Changelog

@rxjs-ninja/rxjs-array provides operators for RxJS for working with of Array types in RxJS.

A full list is available on the API Page.

Function and Operator categories

Filter

Operators that return source Arrays, or items from arrays using filtering functions or properties.

const technology$ = of(['RxJS', 'TypeScript', 'Angular', 'Node', 'NativeScript', 'RxJS Ninja']);
const frontEnd$ = of(['RxJS', 'TypeScript', 'Angular', 'RxJS Ninja', 'React']);

// Get the intersection between two Array values
technology$.pipe(intersection(frontEnd$)).subscribe();
// Output: ['RxJS', 'TypeScript', 'Angular', 'RxJS Ninja']

// Get the difference in the source array
technology$.pipe(difference(frontEnd$)).subscribe();
// Output: ['Node', 'NativeScript']

// Get the difference from both source and input
technology$.pipe(differenceAll(frontEnd$)).subscribe();
// Output: [ ['Node', 'NativeScript'], ['React'] ]

Map Objects

Operators for working with Map objects and converting to and from Array

const technology$ = of(['RxJS', 'TypeScript', 'Angular', 'Node', 'NativeScript', 'RxJS Ninja']);
const categories$ = of(['Library', 'Language', 'Framework', 'Runtime', 'Framework', 'Library']);

// Merge two arrays into a tuple and convert it to a map
combineLatest([technology$, categories$])
  .pipe(
    map(([technology, categories]) => technology.map((tech, index) => [tech, categories[index]])),
    toMap(),
    tap((techStack) => {
      console.log(techStack.has('TypeScript')); // true
      console.log(techStack.get('RxJS Ninja')); // 'Library'
    }),
  )
  .subscribe();

Modify

Operators for modifying the source Array such as sorting, reversing, changing the data or to a string

const technology$ = of(['RxJS', 'TypeScript', 'Angular', 'Node', 'NativeScript', 'RxJS Ninja']);

// Sort the array
technology$.pipe(sort()).subscribe();
// Output: `['Angular', 'NativeScript', 'Node', 'RxJS', 'RxJS Ninja', 'TypeScript']`

// Reverse the array
technology$.pipe(reverse()).subscribe();
// Output: `['RxJS Ninja', 'NativeScript', 'Node', 'Angular', 'TypeScript', 'RxJS']`

// Fill the array
technology$.pipe(fill('jQuery')).subscribe();
// Output: `['jQuery', 'jQuery', 'jQuery', 'jQuery', 'jQuery', 'jQuery']`

Object

Operators for working with Object objects and converting to and from Array

const technology$ = of(['RxJS', 'TypeScript', 'Angular', 'Node', 'NativeScript', 'RxJS Ninja']);
const categories$ = of(['Library', 'Language', 'Framework', 'Runtime', 'Framework', 'Library']);

// Merge two arrays into a tuple and convert it to a map
combineLatest([technology$, categories$])
  .pipe(
    map(([technology, categories]) => technology.map((tech, index) => [index, { tech, category: categories[index] }])),
    toObject(),
  )
  .subscribe();

// {
//  1: { name: 'RxJS', category: 'Library' }, 2: { name: 'Typescript', category: 'Languge' },
//  3: { name: 'Angular', category: 'Framework' }, 4: { name: 'Node', category: 'Runtime' }, ,
//  5: { name: 'NativeScript', category: 'Framework' }, 6: { name: 'RxJS Ninja', category: 'Library' },
// }

Query

Operators for querying for indexes or truthy values related to Array contents

const technology$ = of(['RxJS', 'TypeScript', 'Angular', 'Node', 'NativeScript', 'RxJS Ninja']);
const frontEnd$ = of(['RxJS', 'TypeScript', 'Angular', 'RxJS Ninja', 'React']);

// Check is source is subset of input
technology$.pipe(isSubsetOf(frontEnd$)).subscribe();
// Output: `false`

// Check if source is a superset of input
technology$.pipe(isSupersetOf(frontEnd$)).subscribe();
// Output: `true`

// Check if the source array contains some strings with `length < 5`
technology$.pipe(some((value) => value.length < 5)).subscribe();
// Output : `true`

// Check if the source array strings are all `length < 5`
technology$.pipe(every((value) => value.length < 5)).subscribe();
// Output : `false`

Set

Operators for working with Set objects and converting to and from Array

const technologyStream$ = of(['RxJS', 'TypeScript', 'Angular', 'RxJS', 'TypeScript', 'RxJS Ninja']);

// Covert array to set
technology$.pipe(toSet()).subscribe();
// Output: `Set(4) { 'RxJS', 'TypeScript', 'Angular', 'RxJS Ninja' }`