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https://github.com/hoaproject/Math
The Hoa\Math library.
https://github.com/hoaproject/Math
arithmetic-expression hoa library mathematics php
Last synced: about 1 month ago
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The Hoa\Math library.
- Host: GitHub
- URL: https://github.com/hoaproject/Math
- Owner: hoaproject
- Archived: true
- Created: 2012-08-24T10:31:13.000Z (over 12 years ago)
- Default Branch: master
- Last Pushed: 2021-04-29T19:09:54.000Z (over 3 years ago)
- Last Synced: 2024-10-30T00:00:43.017Z (about 2 months ago)
- Topics: arithmetic-expression, hoa, library, mathematics, php
- Language: PHP
- Homepage: https://hoa-project.net/
- Size: 189 KB
- Stars: 366
- Watchers: 14
- Forks: 37
- Open Issues: 15
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
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README
---
Hoa is a modular, extensible and
structured set of PHP libraries.
Moreover, Hoa aims at being a bridge between industrial and research worlds.# Hoa\Math
[![Help on IRC](https://img.shields.io/badge/help-%23hoaproject-ff0066.svg)](https://webchat.freenode.net/?channels=#hoaproject)
[![Help on Gitter](https://img.shields.io/badge/help-gitter-ff0066.svg)](https://gitter.im/hoaproject/central)
[![Documentation](https://img.shields.io/badge/documentation-hack_book-ff0066.svg)](https://central.hoa-project.net/Documentation/Library/Math)
[![Board](https://img.shields.io/badge/organisation-board-ff0066.svg)](https://waffle.io/hoaproject/math)This library provides tools around mathematical operations.
[Learn more](https://central.hoa-project.net/Documentation/Library/Math).
## Installation
With [Composer](https://getcomposer.org/), to include this library into
your dependencies, you need to
require [`hoa/math`](https://packagist.org/packages/hoa/math):```sh
$ composer require hoa/math '~1.0'
```For more installation procedures, please read [the Source
page](https://hoa-project.net/Source.html).## Testing
Before running the test suites, the development dependencies must be installed:
```sh
$ composer install
```Then, to run all the test suites:
```sh
$ vendor/bin/hoa test:run
```For more information, please read the [contributor
guide](https://hoa-project.net/Literature/Contributor/Guide.html).## Quick usage
We propose a quick overview of one feature: evaluation of arithmetical
expressions.### Evaluation of arithmetical expressions
The `hoa://Library/Math/Arithmetic.pp` describes the form of an arithmetical
expression. Therefore, we will use the classical workflow when manipulating a
grammar, that involves the [`Hoa\Compiler`
library](https://central.hoa-project.net/Resource/Library/Compiler) and the
`Hoa\Math\Visitor\Arithmetic` class.```php
// 1. Load the compiler.
$compiler = Hoa\Compiler\Llk::load(
new Hoa\File\Read('hoa://Library/Math/Arithmetic.pp')
);// 2. Load the visitor, aka the “evaluator”.
$visitor = new Hoa\Math\Visitor\Arithmetic();// 3. Declare the expression.
$expression = '1 / 2 / 3 + 4 * (5 * 2 - 6) * PI / avg(7, 8, 9)';// 4. Parse the expression.
$ast = $compiler->parse($expression);// 5. Evaluate.
var_dump(
$visitor->visit($ast)
);/**
* Will output:
* float(6.4498519738463)
*/// Bonus. Print the AST of the expression.
$dump = new Hoa\Compiler\Visitor\Dump();
echo $dump->visit($ast);/**
* Will output:
* > #addition
* > > #division
* > > > token(number, 1)
* > > > #division
* > > > > token(number, 2)
* > > > > token(number, 3)
* > > #multiplication
* > > > token(number, 4)
* > > > #multiplication
* > > > > #group
* > > > > > #substraction
* > > > > > > #multiplication
* > > > > > > > token(number, 5)
* > > > > > > > token(number, 2)
* > > > > > > token(number, 6)
* > > > > #division
* > > > > > token(constant, PI)
* > > > > > #function
* > > > > > > token(id, avg)
* > > > > > > token(number, 7)
* > > > > > > token(number, 8)
* > > > > > > token(number, 9)
*/
```We can add functions and constants on the visitor, thanks to the `addFunction`
and `addConstant` methods. Thus, we will add the `rand` function (with 2
parameters) and the `ANSWER` constant, set to 42:```php
$visitor->addFunction('rand', function ($min, $max) {
return mt_rand($min, $max);
});
$visitor->addConstant('ANSWER', 42);$expression = 'rand(ANSWER / 2, ANSWER * 2)'
var_dump(
$visitor->visit($compiler->parse($expression))
);/**
* Could output:
* int(53)
*/
```## Documentation
The
[hack book of `Hoa\Math`](https://central.hoa-project.net/Documentation/Library/Math) contains
detailed information about how to use this library and how it works.To generate the documentation locally, execute the following commands:
```sh
$ composer require --dev hoa/devtools
$ vendor/bin/hoa devtools:documentation --open
```More documentation can be found on the project's website:
[hoa-project.net](https://hoa-project.net/).## Getting help
There are mainly two ways to get help:
* On the [`#hoaproject`](https://webchat.freenode.net/?channels=#hoaproject)
IRC channel,
* On the forum at [users.hoa-project.net](https://users.hoa-project.net).## Contribution
Do you want to contribute? Thanks! A detailed [contributor
guide](https://hoa-project.net/Literature/Contributor/Guide.html) explains
everything you need to know.## License
Hoa is under the New BSD License (BSD-3-Clause). Please, see
[`LICENSE`](https://hoa-project.net/LICENSE) for details.## Related projects
The following projects are using this library:
* [PSIH & PMSIpilot](http://www.psih.fr/en/),
PSIH is the leading French integrator of business intelligence solutions for
the healthcare sector,
* [PHP Telegram Bot](https://github.com/akalongman/php-telegram-bot/),
Telegram bot based on the official Telegram Bot API.