https://github.com/formulae-org/package-expression-js

Expression package for Fōrmulæ, in JavaScript
https://github.com/formulae-org/package-expression-js

cardinality create-expression deserialization expression formulae javascript protect reduce serialization

Last synced: 10 months ago
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Expression package for Fōrmulæ, in JavaScript

• Host: GitHub
• URL: https://github.com/formulae-org/package-expression-js
• Owner: formulae-org
• License: agpl-3.0
• Created: 2023-04-14T03:49:00.000Z (about 3 years ago)
• Default Branch: main
• Last Pushed: 2025-04-01T05:11:41.000Z (about 1 year ago)
• Last Synced: 2025-04-01T06:23:04.474Z (about 1 year ago)
• Topics: cardinality, create-expression, deserialization, expression, formulae, javascript, protect, reduce, serialization
• Language: JavaScript
• Homepage:
• Size: 57.6 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# package-expression-js

Expression package for the [Fōrmulæ](https://formulae.org) programming language.

Fōrmulæ is also a software framework for visualization, edition and manipulation of complex expressions, from many fields. The code for an specific field —i.e. arithmetics— is encapsulated in a single unit called a Fōrmulæ **package**.

This repository contains the source code for the **expression package**. It is intended to contain operations applicable to most (or all) other expressions, or expression related to [reflection](https://en.wikipedia.org/wiki/Reflective_programming).

The GitHub organization [formulae-org](https://github.com/formulae-org) encompasses the source code for the rest of packages, as well as the [web application](https://github.com/formulae-org/formulae-js).

### Capabilities ###

* Expressions applicable universally

  * **Subexpression** expression. It retrieves the i-th subexpression of a given expression. It is shown as $x_i$

  * **Tag** expression. It retrieves the tag of a given expression

  * **Cardinality** expression. It retrieves to number of subexpressions of a given expression. It is shown as $|x|$

  * **Appends/prepends** a subexpression after/before the last/first subexpression of a given expression

  * **Insertion** of a subexpression at a given position

  * **Deletion** of a subexpression at a given position

* Expressions related to reduction

  * **Protect expression**. It prevents a given expression to be reduced

  * **Reduce expression**. Forces reduction of an expression.

* Expressions related to programatic creation of expressions

  * **Serializeation** expression. It converts a given expression to XML text.

  * **Deserialization** expression. It creates an expression from XML text

  * **Create expression** expression. Creation of an expression from its tag

  * **Create expression tree** expression. Creation of an expression from its subexpressions

* Others

  * **Group** expression. Create groups of expressions