PHP code example of dbrans / stream-pipeline

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

dbrans / stream-pipeline example snippets

$input = [' B1 ', ' B2', 'a1 ', ' a2 ', 'a3', ' b1', ' b2', 'b3'];
$elements = [];

foreach ($input as $e) {
    $elem = strtoupper(trim($e));

    if (substr($e, 0, 1) === 'B' && !in_array($elem, $elements)) {
        $elements[] = $elem;
    }
}

return implode(',', $elements);

return Stream::of(' B1 ', ' B2', 'a1 ', ' a2 ', 'a3', ' b1', ' b2', 'b3')
    ->map(Strings::trim())
    ->map(Strings::toUpper())
    ->filter(Strings::startsWith('B'))
    ->distinct()
    ->collect(Collectors::join(','));

use StreamPipeline\Stream;

use StreamPipeline\Stream;

$arrStream = Stream::fromIterable($myArray);
// or
$arrStream = Stream::of(' B1 ', ' B2', 'a1 ', ' a2 ', 'a3', ' b1', ' b2', 'b3')

use StreamPipeline\Collectors;
use StreamPipeline\Iterators\NumberGenerator;
use StreamPipeline\Operations\Strings;

// ...

$arrStream
    ->map(Strings::trim())
    ->map(Strings::toUpper())
    ->filter(Strings::startsWith('B'))
    ->distinct()
    ->forEach(function ($e) {
        echo $e;
    });

$arrStream
    ->filter(function ($e) {
        return $e % 2 === 0;
    })
    ->map(function ($e) {
        return $e + 10;
    })
    ->toArray();

$arrStream
    ->filter(Numbers::isEven())
    ->map(Numbers::plus(10))
    ->collect(Collectors::sum());

$arrStream
    ->map(function ($elem, $i, $index) {
        return ...
    })
    ->toArray();

Stream::of('a', 'b', 'c', 'd', 'e', 'f')
    ->limit(5)
    ->collect(Collectors::join(','));

Stream::iterate(1, new NumberGenerator(1))
    ->filter(Numbers::isEven())
    ->skip(5)
    ->limit(11);