PHP toRna Examples

Example #1

File: rna-transcription.php Project: rojoangel/exercism.io

/**
 * @param string $dnaStrand
 * @return null|string
 */
function toRna($dnaStrand)
{
    /** @var array $transcriptions */
    $transcriptions = ['C' => 'G', 'G' => 'C', 'T' => 'A', 'A' => 'U'];
    if (empty($dnaStrand)) {
        return null;
    }
    $nucleotide = substr($dnaStrand, 0, 1);
    return $transcriptions[$nucleotide] . toRna(substr($dnaStrand, 1));
}

Example #2

File: rna-transcription_test.php Project: rojoangel/exercism.io

 public function testTranscribesAllOccurencesOne()
 {
     $this->assertSame('UGCACCAGAAUU', toRna('ACGTGGTCTTAA'));
 }