Proyectos de Subversion Moodle

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1 efrain 1 
<?php
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declare(strict_types=1);
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namespace Phpml\Preprocessing;
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final class ColumnFilter implements Preprocessor
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{
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    /**
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     * @var string[]
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     */
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    private $datasetColumns = [];
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    /**
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     * @var string[]
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     */
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    private $filterColumns = [];
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    public function __construct(array $datasetColumns, array $filterColumns)
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    {
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        $this->datasetColumns = array_map(static function (string $column): string {
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            return $column;
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        }, $datasetColumns);
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        $this->filterColumns = array_map(static function (string $column): string {
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            return $column;
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        }, $filterColumns);
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    }
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    public function fit(array $samples, ?array $targets = null): void
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    {
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        //nothing to do
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    }
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    public function transform(array &$samples, ?array &$targets = null): void
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    {
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        $keys = array_intersect($this->datasetColumns, $this->filterColumns);
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        foreach ($samples as &$sample) {
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            $sample = array_values(array_intersect_key($sample, $keys));
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        }
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    }
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}