README

PHP Mathematics Library for easier calculation of Base Converts, Factorials, Permutation and Combination.

Installation

You can install the package via composer:

composer require graphita/mathematics

Usage

Base Convert

use Graphita\Mathematics\BaseConvert;

// Convert a Number from Base 10 to Base 2
$result = BaseConvert::convert(6)->to(2)->getResult(); // 110
$resultArray = BaseConvert::convert(6)->to(2)->getResultArray(); // [1,1,0]

// Convert a Number from Base 8 to Base 10
$result = BaseConvert::convert(20, 8)->to(10)->getResult(); // 16

// Convert a Number from Base 16 with Source Characters Map to Base 10
$result = BaseConvert::convert('FF', 16, '0123456789ABCDEF')->to(10)->getResult(); // 255

// Convert a Number from Base 10 to Base 16 with Destination Characters Map
$result = BaseConvert::convert(255)->to(16, '0123456789ABCDEF')->getResult(); // FF

// Convert a Number from Base 16 with Source Characters Map to Base 10 with Destination Characters Map
$result = BaseConvert::convert('FF', 16, '0123456789ABCDEF')->to(10, 'ZYXWVUTSRQ')->getResult(); // XUU

Factorial

use Graphita\Mathematics\Factorial;

// Factorial 3 : 3x2x1
$result = Factorial::instance(3)->calculate()->getResult(); // 6

// Factorial 4 : 4x3x2x1
$result = Factorial::instance(4)->calculate()->getResult(); // 24

// Factorial 5 : 5x4x3x2x1
$factorial = new Factorial;
$factorial->setNumber(5);
$factorial->calculate();
$result = $factorial->getResult();

Permutation

use Graphita\Mathematics\Permutation;

// Permutation two Character without Repetitions
$permutation = new Permutation();
$permutation->setItems(['a', 'b']);
$permutation->setSelection(2);
$permutation->calculate();
$result = $permutation->getPossibilities(); // [ ['a', 'b'], ['b','a'] ]
$count = $permutation->countPossibilities(); // 2

// Permutation two Character with Repetitions
$permutation = new Permutation();
$permutation->setItems(['a', 'b']);
$permutation->setSelection(2);  
$permutation->setRepetitions(true);
$permutation->calculate();
$result = $permutation->getPossibilities(); // [ ['a', 'a'], ['a', 'b'], ['b','a'], ['b','b'] ]
$count = $permutation->countPossibilities(); // 4

// Permutation for huge dataset, for avoid memory leak
$permutation = new Permutation();
$permutation->setItems(range(1,100)); // [1, 2, 3, ..., 100]
$permutation->setSelection(10);  
$generator = $permutation->calculateWithoutSave();
foreach ($generator as $possibility){ // // loop over Factorial(100) / Factorial(100 - 10)
    print_r($possibility); // start from [1,2,3,4,5,6,7,8,9,10] to [100,99,98,97,96,95,94,93,92,91]
}

Combination

use Graphita\Mathematics\Combination;

// Combination two Character without Repetitions
$combination = new Combination();
$combination->setItems(['a', 'b']);
$combination->setSelection(2);
$combination->calculate();
$result = $combination->getPossibilities(); // [ ['a', 'b'] ]
$count = $combination->countPossibilities(); // 1

// Combination two Character with Repetitions
$combination = new Combination();
$combination->setItems(['a', 'b']);
$combination->setSelection(2);  
$combination->setRepetitions(true);
$combination->calculate();
$result = $combination->getPossibilities(); // [ ['a', 'a'], ['a', 'b'], ['b','b'] ]
$count = $combination->countPossibilities(); // 3

// Combination for huge dataset, for avoid memory leak
$combination = new Combination();
$combination->setItems(range(1,100)); // [1, 2, 3, ..., 100]
$combination->setSelection(10);  
$generator = $combination->calculateWithoutSave();
foreach ($generator as $possibility){ // loop over Factorial(100) / ( Factorial(100 - 10) * Factorial(10) )
     print_r($possibility); // start from [1,2,3,4,5,6,7,8,9,10] to [100,99,98,97,96,95,94,93,92,91]
}

License

The MIT License (MIT). Please see License File for more information.

graphita / mathematics

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