Differential D2052 Diff 5183 src/Strings/SorensenDiceCoefficient.php

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				<?php
				declare(strict_types=1);

				namespace Keruald\OmniTools\Strings;

				use Keruald\OmniTools\Strings\Multibyte\OmniString;

				class SorensenDiceCoefficient {

				/**
				* @var string[]
				*/
				private $x;

				/**
				* @var string[]
				*/
				private $y;

				///
				/// Constructors
				///

				public function __construct (string $left, string $right) {
				$this->x = (new OmniString($left))->getBigrams();
				$this->y = (new OmniString($right))->getBigrams();
				}

				public static function computeFor(string $left, string $right) : float {
				$instance = new self($left, $right);

				return $instance->compute();
				}

				///
				/// Sørensen formula
				///

				public function compute() : float {
				return 2 * $this->countIntersect()
				/
				$this->countCharacters();
				}

				private function countIntersect () : int {
				$intersect = array_intersect($this->x, $this->y);

				return count($intersect);
				}

				private function countCharacters () : int {
				return count($this->x) + count($this->y);
				}

				}