@stdlib/utils-deep-set

Set a nested property value.

https://github.com/stdlib-js/utils-deep-set

Science Score: 44.0%

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Low similarity (15.1%) to scientific vocabulary

Keywords

array assign deep javascript nested node node-js nodejs obj object prop property set stdlib util utilities utility utils

Last synced: 6 months ago · JSON representation ·

Repository

Set a nested property value.

Basic Info

Host: GitHub
Owner: stdlib-js
License: apache-2.0
Language: JavaScript
Default Branch: main
Homepage: https://github.com/stdlib-js/stdlib
Size: 1.32 MB

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

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array assign deep javascript nested node node-js nodejs obj object prop property set stdlib util utilities utility utils

Created over 4 years ago · Last pushed 7 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!

Deep Set

Set a nested property value.

## Installation ```bash npm install @stdlib/utils-deep-set ``` 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 deepSet = require( '@stdlib/utils-deep-set' ); ``` #### deepSet( obj, path, value\[, options] ) Sets a nested property value. ```javascript var obj = { 'a': { 'b': { 'c': 'd' } } }; var bool = deepSet( obj, 'a.b.c', 'beep' ); // returns true console.log( obj ); // => { 'a': { 'b': { 'c': 'beep' } } } ``` If the function is able to deep set a nested property, the function returns `true`; otherwise, the function returns `false`. ```javascript var obj = { 'a': { 'b': { 'c': 'd' } } }; var bool = deepSet( obj, 'a.b.c', 'woot' ); // returns true bool = deepSet( obj, 'a.beep.c', 'boop' ); // returns false bool = deepSet( null, 'a.beep.c', 'boop' ); // returns false bool = deepSet( 'bap', 'a.beep.c', 'boop' ); // returns false ``` For `paths` including `arrays`, specify the numeric index. ```javascript var arr = [ { 'a': [ { 'x': 5 } ] }, { 'a': [ { 'x': 10 } ] } ]; var bool = deepSet( arr, '1.a.0.x', 25 ); // returns true console.log( arr ); /* => [ { 'a': [ { 'x': 5 } ] }, { 'a': [ { 'x': 25 } ] } ] */ ``` The key `path` may be specified as either a delimited `string` or a key `array`. ```javascript var obj = { 'a': { 'b': { 'c': 'd' } } }; var bool = deepSet( obj, [ 'a', 'b', 'c' ], 'beep' ); // obj => { 'a': { 'b': { 'c': 'beep' } } } // returns true ``` If `value` is a `function`, the argument is treated as a `callback` and should return a value to set. ```javascript function set( val ) { var ch = val; var i; for ( i = 0; i < 4; i++ ) { val += ch; } return val; } var obj = { 'a': { 'b': { 'c': 'd' } } }; var bool = deepSet( obj, 'a.b.c', set ); // obj => { 'a': { 'b': { 'c': 'ddddd' } } } // returns true ``` The function accepts the following `options`: - **sep**: key path separator. Default: `'.'`. - **create**: `boolean` indicating whether to create a path if the key path does not already exist. Default: `false`. By default, the function assumes `dot` separated key values. To specify an alternative separator, set the `sep` option. ```javascript var obj = { 'a': { 'b': { 'c': 'd' } } }; var bool = deepSet( obj, 'a/b/c', 'beep', { 'sep': '/' }); // returns true console.log( obj ); // => { 'a': { 'b': { 'c': 'beep' } } } ``` To create a key path which does not already exist, set the `create` option to `true`. ```javascript var obj = { 'a': { 'b': { 'c': 'd' } } }; var bool = deepSet( obj, 'a.e.c', 'boop', { 'create': true }); // returns true console.log( obj ); /* => { 'a': { 'b': { 'c': 'beep' }, 'e': { 'c': 'boop' } } } */ ``` #### deepSet.factory( path\[, options] ) Creates a reusable deep set function. The factory method ensures a `deepSet` function is configured identically by using the same set of provided `options`. ```javascript var dset = deepSet.factory( 'a/b/c', { 'create': true, 'sep': '/' }); ``` #### dset( obj, value ) Sets a nested property value. ```javascript var dset = deepSet.factory( 'a.b.c' ); var obj = { 'a': { 'b': { 'c': 'd' } } }; var bool = dset( obj, 'beep' ); // returns true console.log( obj ); // => { 'a': { 'b': { 'c': 'beep' } } } ```

## Examples ```javascript var randu = require( '@stdlib/random-base-randu' ); var deepSet = require( '@stdlib/utils-deep-set' ); var data; var bool; var keys; var i; function set( val ) { return val * 10.0; } data = new Array( 100 ); for ( i = 0; i < data.length; i++ ) { data[ i ] = { 'x': Date.now(), 'y': [ randu(), randu(), i ] }; } keys = [ 0, 'y', 2 ]; for ( i = 0; i < data.length; i++ ) { keys[ 0 ] = i; bool = deepSet( data, keys, set ); if ( !bool ) { console.error( 'Unable to deep set value.' ); } } console.log( data ); ```

* * * ## 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

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Total packages: 1
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Total versions: 12
Total maintainers: 4

npmjs.org: @stdlib/utils-deep-set

Set a nested property value.

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

Versions: 12
Dependent Packages: 3
Dependent Repositories: 1
Downloads: 9 Last month

Rankings

Dependent packages count: 5.9%

Dependent repos count: 10.3%

Average: 13.2%

Stargazers count: 14.5%

Forks count: 15.4%

Downloads: 19.6%

Maintainers (4)

planeshifter rreusser stdlib-bot kgryte

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

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@stdlib/utils-deep-set

Science Score: 44.0%

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Deep Set

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