public function testLetsDoCoolThingsSuchAsMapReduce()
{
$arrayOfPhrases = array('first second third', 'first second', 'fourth second fourth', 'first second second', 'third second third');
$phrasesStream = new S\Stream($arrayOfPhrases);
$computedArray = $phrasesStream->map(function ($line) {
return array_count_values(explode(' ', $line));
})->reduce(array(), function ($acc, $next) {
foreach ($next as $word => $count) {
if (isset($acc[$word])) {
$acc[$word] += $count;
} else {
$acc[$word] = $count;
}
}
return $acc;
});
$this->assertEquals(3, $computedArray['first']);
$this->assertEquals(6, $computedArray['second']);
$this->assertEquals(3, $computedArray['third']);
$this->assertEquals(2, $computedArray['fourth']);
}
