https://github.com/sgrishchenko/reselect-utils

A collection of helpers and utilities for selectors
https://github.com/sgrishchenko/reselect-utils

re-reselect reselect reselect-utils selector

Last synced: 9 months ago
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A collection of helpers and utilities for selectors

• Host: GitHub
• URL: https://github.com/sgrishchenko/reselect-utils
• Owner: sgrishchenko
• License: mit
• Created: 2019-01-05T19:49:39.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2023-06-20T14:58:10.000Z (over 2 years ago)
• Last Synced: 2025-03-28T19:45:09.766Z (10 months ago)
• Topics: re-reselect, reselect, reselect-utils, selector
• Language: TypeScript
• Homepage: https://sgrishchenko.github.io/reselect-utils/docz
• Size: 7.5 MB
• Stars: 16
• Watchers: 2
• Forks: 4
• Open Issues: 28
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# [Reselect Utils](https://sgrishchenko.github.io/reselect-utils/docz)

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## Install

Install from the NPM repository using yarn or npm:

```shell

yarn add reselect-utils

```

```shell

npm install reselect-utils

```

## Motivation

Such projects as [Reselect](https://github.com/reduxjs/reselect) and [Re-reselect](https://github.com/toomuchdesign/re-reselect) try to solve the task of memoization. But there is no standard solutions for some applied problems. This library was created to try to systematically solve the following problems:

- Work with optional objects as a source for selection.

- Binding parametric selectors to specific property values.

- Adaptation of parametric selectors to the new parameter interface (useful for creating parametric [structured selectors](https://github.com/reduxjs/reselect#createstructuredselectorinputselectors-selectorcreator--createselector)).

- Using selection results as parameters for a new selection.

- Calculating the aggregate value from a collection of selector results.

- Structuring of selection results (more proper typed version of [structured selector](https://github.com/reduxjs/reselect#createstructuredselectorinputselectors-selectorcreator--createselector) and [cached structured selector](https://github.com/toomuchdesign/re-reselect#createStructuredCachedSelector)).

- Implementation of key selectors composition (useful for [key selector creator](https://github.com/toomuchdesign/re-reselect#keyselectorcreator) usages).

## Credits

Reselect Utils is inspired by projects such as [Reselect](https://github.com/reduxjs/reselect), [Re-reselect](https://github.com/toomuchdesign/re-reselect) and [ts-optchain](https://github.com/rimeto/ts-optchain).

Also functional programming principles are used for design of this library. For example, [Chain Selector]() was inspired by Monad Pattern.