@stdlib/utils-map-values

Map values from one object to a new object having the same keys.

https://github.com/stdlib-js/utils-map-values

Science Score: 44.0%

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Low similarity (16.2%) to scientific vocabulary

Keywords

clone copy cp create extract filter javascript map node node-js nodejs omit pick pluck stdlib transform util utilities utility utils

Last synced: 6 months ago · JSON representation ·

Repository

Map values from one object to a new object having the same keys.

Basic Info

Host: GitHub
Owner: stdlib-js
License: apache-2.0
Language: JavaScript
Default Branch: main
Homepage: https://github.com/stdlib-js/stdlib
Size: 748 KB

Statistics

Stars: 2
Watchers: 3
Forks: 0
Open Issues: 0
Releases: 0

Topics

clone copy cp create extract filter javascript map node node-js nodejs omit pick pluck stdlib transform util utilities utility utils

Created over 4 years ago · Last pushed 9 months ago

Metadata Files

Readme Changelog Contributing License Code of conduct Citation Security

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!

mapValues

Map values from one object to a new object having the same keys.

## Installation ```bash npm install @stdlib/utils-map-values ``` Alternatively, - To load the package in a website via a `script` tag without installation and bundlers, use the [ES Module][es-module] available on the [`esm`][esm-url] branch (see [README][esm-readme]). - If you are using Deno, visit the [`deno`][deno-url] branch (see [README][deno-readme] for usage intructions). - For use in Observable, or in browser/node environments, use the [Universal Module Definition (UMD)][umd] build available on the [`umd`][umd-url] branch (see [README][umd-readme]). The [branches.md][branches-url] file summarizes the available branches and displays a diagram illustrating their relationships. To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.

## Usage ```javascript var mapValues = require( '@stdlib/utils-map-values' ); ``` #### mapValues( obj, transform ) Maps values from one `object` to a new `object` having the same keys. ```javascript function transform( value, key ) { return key + value; } var obj1 = { 'a': 1, 'b': 2 }; var obj2 = mapValues( obj1, transform ); // returns { 'a': 'a1', 'b': 'b2' } ``` The `transform` function is provided three arguments: - **value**: object value corresponding to `key`. - **key**: object key. - **obj**: the input object.

## Notes - Key iteration order is **not** guaranteed, as `object` key enumeration is not specified according to the [ECMAScript specification][ecma-262-for-in]. In practice, however, most engines use insertion order to sort an `object`'s keys, thus allowing for deterministic return values. - The function only maps values assigned to **own** properties. Hence, the function does **not** map values for inherited properties. - The function **shallow** copies key values.

## Examples ```javascript var mapValues = require( '@stdlib/utils-map-values' ); function transform( value, key ) { return key + ':' + value; } var obj1 = { 'a': 'beep', 'b': 'boop', 'c': 'foo', 'd': 'bar' }; var obj2 = mapValues( obj1, transform ); console.dir( obj2 ); // => { 'a': 'a:beep', 'b': 'b:boop', 'c': 'c:foo', 'd': 'd:bar' } ```

* * * ## Notice This package is part of [stdlib][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][stdlib], see the main project [repository][stdlib]. #### Community [![Chat][chat-image]][chat-url] --- ## License See [LICENSE][stdlib-license]. ## Copyright Copyright © 2016-2025. The Stdlib [Authors][stdlib-authors].

Owner

Name: stdlib
Login: stdlib-js
Kind: organization

Website: https://stdlib.io
Twitter: stdlibjs
Repositories: 3,692
Profile: https://github.com/stdlib-js

Standard library for JavaScript.

Citation (CITATION.cff)

cff-version: 1.2.0
title: stdlib
message: >-
  If you use this software, please cite it using the
  metadata from this file.

type: software

authors:
  - name: The Stdlib Authors
    url: https://github.com/stdlib-js/stdlib/graphs/contributors

repository-code: https://github.com/stdlib-js/stdlib
url: https://stdlib.io

abstract: |
  Standard library for JavaScript and Node.js.

keywords:
  - JavaScript
  - Node.js
  - TypeScript
  - standard library
  - scientific computing
  - numerical computing
  - statistical computing

license: Apache-2.0 AND BSL-1.0

date-released: 2016

GitHub Events

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Push event: 19

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Push event: 19

Committers

Last synced: about 2 years ago

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Total Commits: 53
Total Committers: 1
Avg Commits per committer: 53.0
Development Distribution Score (DDS): 0.0

Past Year

Commits: 15
Committers: 1
Avg Commits per committer: 15.0
Development Distribution Score (DDS): 0.0

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Committer Domains (Top 20 + Academic)

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Last synced: 6 months ago

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Packages

Total packages: 1
Total downloads:
- npm 8 last-month

Total dependent packages: 2
Total dependent repositories: 0
Total versions: 13
Total maintainers: 4

npmjs.org: @stdlib/utils-map-values

Map values from one object to a new object having the same keys.

Homepage: https://stdlib.io
License: Apache-2.0
Latest release: 0.2.2
published over 1 year ago

Versions: 13
Dependent Packages: 2
Dependent Repositories: 0
Downloads: 8 Last month

Rankings

Dependent packages count: 9.5%

Downloads: 14.0%

Average: 16.6%

Stargazers count: 16.8%

Forks count: 17.4%

Dependent repos count: 25.3%

Maintainers (4)

planeshifter rreusser stdlib-bot kgryte

Funding

type: opencollective
url: https://opencollective.com/stdlib

Last synced: 6 months ago

Dependencies

package.json npm

@stdlib/bench ^0.0.x development
@stdlib/random-base-randu ^0.0.x development
@stdlib/utils-noop ^0.0.x development
istanbul ^0.4.1 development
tap-spec 5.x.x development
tape git+https://github.com/kgryte/tape.git#fix/globby development
@stdlib/assert-has-own-property ^0.0.x
@stdlib/assert-is-function ^0.0.x
@stdlib/string-format ^0.0.x

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@stdlib/utils-map-values

Science Score: 44.0%

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README.md

mapValues

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npmjs.org: @stdlib/utils-map-values

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