@stdlib/utils-object-inverse

v0.2.2

Invert an object, such that keys become values and values become keys. For more information about how to use this package see README

Latest version published 4 months ago

License: Apache-2.0

NPM

GitHub

Package Health Score

68 / 100

security
No known security issues
popularity
Small
maintenance
Sustainable
community
Sustainable

Explore Similar Packages

Security

No known security issues

All security vulnerabilities belong to production dependencies of direct and indirect packages.

Security and license risk for significant versions

All Versions

Version			Vulnerabilities	License Risk
0.2.2	\|	07/2024	0 C 0 H 0 M 0 L	0 H 0 M 0 L
0.1.0	\|	09/2023	0 C 0 H 0 M 0 L	0 H 0 M 0 L
0.0.8	\|	02/2022	0 C 0 H 0 M 0 L	0 H 0 M 0 L

License

Apache-2.0

Security Policy

Yes

Is your project affected by vulnerabilities?

Scan your projects for vulnerabilities. Fix quickly with automated fixes. Get started with Snyk for free.

Get started free

Popularity

Small

Weekly Downloads (2,138)

GitHub Stars: 2
Forks: 0
Contributors: 1

Direct Usage Popularity

The npm package @stdlib/utils-object-inverse receives a total of 2,138 downloads a week. As such, we scored @stdlib/utils-object-inverse popularity level to be Small.

Based on project statistics from the GitHub repository for the npm package @stdlib/utils-object-inverse, we found that it has been starred 2 times.

Downloads are calculated as moving averages for a period of the last 12 months, excluding weekends and known missing data points.

Community

Sustainable

Readme.md: Yes
Contributing.md: Yes
Code of Conduct: Yes
Contributors: 1
Funding: Yes

This project has seen only 10 or less contributors.

Embed Package Health Score Badge

Maintenance

Sustainable

Commit Frequency

Open Issues: 0
Open PR: 0
Last Release: 4 months ago
Last Commit: 2 months ago

Further analysis of the maintenance status of @stdlib/utils-object-inverse based on released npm versions cadence, the repository activity, and other data points determined that its maintenance is Sustainable.

We found that @stdlib/utils-object-inverse demonstrates a positive version release cadence with at least one new version released in the past 12 months.

In the past month we didn't find any pull request activity or change in issues status has been detected for the GitHub repository.

Keep your project healthy

Check your package.json

Ensure all the packages you're using are healthy and well-maintained

Snyk Vulnerability Scanner

Get health score & security insights directly in your IDE

Package

Node.js Compatibility: >=0.10.0

Age: 3 years
Dependencies: 8 Direct
Versions: 13
Install Size: 33.6 kB
Dist-tags: 1
# of Files: 11
Maintainers: 4
TS Typings: No

@stdlib/utils-object-inverse has more than a single and default latest tag published for the npm package. This means, there may be other tags available for this package, such as next to indicate future releases, or stable to indicate stable releases.

Readme

About stdlib...

We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.

The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.

When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.

To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!

Object Inverse

> Invert an object, such that keys become values and values become keys.

Installation

npm install @stdlib/utils-object-inverse

Usage

var invert = require( '@stdlib/utils-object-inverse' );

invert( obj[, options] )

Inverts an object, such that keys become values and values become keys.

var out = invert({
    'a': 'beep',
    'b': 'boop'
});
// returns { 'beep': 'a', 'boop': 'b' }

The function accepts the following options:

duplicates: boolean indicating whether to store keys mapped to duplicate values in arrays. Default: true.

By default, keys mapped to duplicate values are stored in arrays.

var out = invert({
    'a': 'beep',
    'b': 'beep'
});
// returns { 'beep': [ 'a', 'b' ] }

To not allow duplicates, set the duplicates option to false. The output key-value pair will be the key most recently inserted into the input object.

var obj = {};
obj.a = 'beep';
obj.b = 'boop';
obj.c = 'beep'; // inserted after `a`

var out = invert( obj, {
    'duplicates': false
});
// returns { 'beep': 'c', 'boop': 'b' }

Notes

Beware when providing objects having values which are themselves objects. This implementation relies on native object serialization (#toString) when converting values to keys.

var obj = {
    'a': [ 1, 2, 3 ],
    'b': {
        'c': 'd'
    }
};

var out = invert( obj );
// returns { '1,2,3': 'a', '[object Object]': 'b' }

Insertion order is not guaranteed, as object key enumeration is not specified according to the ECMAScript specification. In practice, however, most engines use insertion order to sort an object's keys, thus allowing for deterministic inversion.

Examples

var randu = require( '@stdlib/random-base-randu' );
var round = require( '@stdlib/math-base-special-round' );
var invert = require( '@stdlib/utils-object-inverse' );

var keys;
var arr;
var out;
var i;

// Create an array of random integers...
arr = new Array( 1000 );
for ( i = 0; i &lt; arr.length; i++ ) {
    arr[ i ] = round( randu()*100.0 );
}
// Invert the array to determine value frequency...
out = invert( arr );
keys = Object.keys( out );
for ( i = 0; i &lt; keys.length; i++ ) {
    if ( out[ i ] ) {
        out[ i ] = out[ i ].length;
    } else {
        out[ i ] = 0;
    }
}
console.dir( out );

Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

Community

License

See LICENSE.

Copyright

@stdlib/utils-object-inverse dependencies

@stdlib/assert-has-own-property @stdlib/assert-is-array @stdlib/assert-is-boolean @stdlib/assert-is-object-like @stdlib/assert-is-plain-object @stdlib/string-format @stdlib/utils-keys @stdlib/error-tools-fmtprodmsg

FAQs

What is @stdlib/utils-object-inverse?

Invert an object, such that keys become values and values become keys. Visit Snyk Advisor to see a full health score report for @stdlib/utils-object-inverse, including popularity, security, maintenance & community analysis.

Is @stdlib/utils-object-inverse popular?

The npm package @stdlib/utils-object-inverse receives a total of 2,138 weekly downloads. As such, @stdlib/utils-object-inverse popularity was classified as small. Visit the popularity section on Snyk Advisor to see the full health analysis.

Is @stdlib/utils-object-inverse well maintained?

We found indications that @stdlib/utils-object-inverse maintenance is sustainable demonstrating some project activity. We saw a total of 1 open source contributors collaborating on the project. See the full package health analysis to learn more about the package maintenance status.

Is @stdlib/utils-object-inverse safe to use?

The npm package @stdlib/utils-object-inverse was scanned for known vulnerabilities and missing license, and no issues were found. Thus the package was deemed as safe to use. See the full health analysis review.

Last updated on 16 November-2024, at 13:57 (UTC).

Build a secure application checklist

Select a recommended open source package

Minimize your risk by selecting secure & well maintained open source packages

DONE

Scan your app for vulnerabilities

Scan your application to find vulnerabilities in your: source code, open source dependencies, containers and configuration files

SCAN NOW

Fix identified vulnerabilities

Easily fix your code by leveraging automatically generated PRs

AUTO FIX

Monitor for new issues

New vulnerabilities are discovered every day. Get notified if your application is affected

MONITOR APP

Package Health Score

Explore Similar Packages

Security and license risk for significant versions

Is your project affected by vulnerabilities?

Weekly Downloads (2,138)

Direct Usage Popularity

Embed Package Health Score Badge

Commit Frequency

Keep your project healthy

Check your package.json

Snyk Vulnerability Scanner

Readme

Object Inverse

Installation

Usage

invert( obj[, options] )

Notes

Examples

See Also

Notice

Community

License

Copyright

@stdlib/utils-object-inverse dependencies

FAQs

What is @stdlib/utils-object-inverse?

Is @stdlib/utils-object-inverse popular?

Is @stdlib/utils-object-inverse well maintained?

Is @stdlib/utils-object-inverse safe to use?

Build a secure application checklist

Select a recommended open source package

Scan your app for vulnerabilities

Source Code

Open Source

Container

Config

Fix identified vulnerabilities

Monitor for new issues