hasArrayArgument() === false) { return [$method(...$arguments)]; } if (self::$arrayArgumentHelper->arrayArguments() === 1) { $nthArgument = self::$arrayArgumentHelper->getFirstArrayArgumentNumber(); return self::evaluateNthArgumentAsArray($method, $nthArgument, ...$arguments); } $singleRowVectorIndex = self::$arrayArgumentHelper->getSingleRowVector(); $singleColumnVectorIndex = self::$arrayArgumentHelper->getSingleColumnVector(); if ($singleRowVectorIndex !== null && $singleColumnVectorIndex !== null) { // Basic logic for a single row vector and a single column vector return self::evaluateVectorPair($method, $singleRowVectorIndex, $singleColumnVectorIndex, ...$arguments); } $matrixPair = self::$arrayArgumentHelper->getMatrixPair(); if ($matrixPair !== []) { if ( (self::$arrayArgumentHelper->isVector($matrixPair[0]) === true && self::$arrayArgumentHelper->isVector($matrixPair[1]) === false) || (self::$arrayArgumentHelper->isVector($matrixPair[0]) === false && self::$arrayArgumentHelper->isVector($matrixPair[1]) === true) ) { // Logic for a matrix and a vector (row or column) return self::evaluateVectorMatrixPair($method, $matrixPair, ...$arguments); } // Logic for matrix/matrix, column vector/column vector or row vector/row vector return self::evaluateMatrixPair($method, $matrixPair, ...$arguments); } // Still need to work out the logic for more than two array arguments, // For the moment, we're throwing an Exception when we initialise the ArrayArgumentHelper return ['#VALUE!']; } /** * @param mixed ...$arguments */ private static function evaluateVectorMatrixPair(callable $method, array $matrixIndexes, ...$arguments): array { $matrix2 = array_pop($matrixIndexes); /** @var array $matrixValues2 */ $matrixValues2 = $arguments[$matrix2]; $matrix1 = array_pop($matrixIndexes); /** @var array $matrixValues1 */ $matrixValues1 = $arguments[$matrix1]; $rows = min(array_map([self::$arrayArgumentHelper, 'rowCount'], [$matrix1, $matrix2])); $columns = min(array_map([self::$arrayArgumentHelper, 'columnCount'], [$matrix1, $matrix2])); if ($rows === 1) { $rows = max(array_map([self::$arrayArgumentHelper, 'rowCount'], [$matrix1, $matrix2])); } if ($columns === 1) { $columns = max(array_map([self::$arrayArgumentHelper, 'columnCount'], [$matrix1, $matrix2])); } $result = []; for ($rowIndex = 0; $rowIndex < $rows; ++$rowIndex) { for ($columnIndex = 0; $columnIndex < $columns; ++$columnIndex) { $rowIndex1 = self::$arrayArgumentHelper->isRowVector($matrix1) ? 0 : $rowIndex; $columnIndex1 = self::$arrayArgumentHelper->isColumnVector($matrix1) ? 0 : $columnIndex; $value1 = $matrixValues1[$rowIndex1][$columnIndex1]; $rowIndex2 = self::$arrayArgumentHelper->isRowVector($matrix2) ? 0 : $rowIndex; $columnIndex2 = self::$arrayArgumentHelper->isColumnVector($matrix2) ? 0 : $columnIndex; $value2 = $matrixValues2[$rowIndex2][$columnIndex2]; $arguments[$matrix1] = $value1; $arguments[$matrix2] = $value2; $result[$rowIndex][$columnIndex] = $method(...$arguments); } } return $result; } /** * @param mixed ...$arguments */ private static function evaluateMatrixPair(callable $method, array $matrixIndexes, ...$arguments): array { $matrix2 = array_pop($matrixIndexes); /** @var array $matrixValues2 */ $matrixValues2 = $arguments[$matrix2]; $matrix1 = array_pop($matrixIndexes); /** @var array $matrixValues1 */ $matrixValues1 = $arguments[$matrix1]; $result = []; foreach ($matrixValues1 as $rowIndex => $row) { foreach ($row as $columnIndex => $value1) { if (isset($matrixValues2[$rowIndex][$columnIndex]) === false) { continue; } $value2 = $matrixValues2[$rowIndex][$columnIndex]; $arguments[$matrix1] = $value1; $arguments[$matrix2] = $value2; $result[$rowIndex][$columnIndex] = $method(...$arguments); } } return $result; } /** * @param mixed ...$arguments */ private static function evaluateVectorPair(callable $method, int $rowIndex, int $columnIndex, ...$arguments): array { $rowVector = Functions::flattenArray($arguments[$rowIndex]); $columnVector = Functions::flattenArray($arguments[$columnIndex]); $result = []; foreach ($columnVector as $column) { $rowResults = []; foreach ($rowVector as $row) { $arguments[$rowIndex] = $row; $arguments[$columnIndex] = $column; $rowResults[] = $method(...$arguments); } $result[] = $rowResults; } return $result; } /** * Note, offset is from 1 (for the first argument) rather than from 0. * * @param mixed ...$arguments */ private static function evaluateNthArgumentAsArray(callable $method, int $nthArgument, ...$arguments): array { $values = array_slice($arguments, $nthArgument - 1, 1); /** @var array $values */ $values = array_pop($values); $result = []; foreach ($values as $value) { $arguments[$nthArgument - 1] = $value; $result[] = $method(...$arguments); } return $result; } }