Documentation
Example: When
Topic: Transformations
Code
<?php
declare(strict_types=1);
use function Flow\ETL\DSL\{data_frame, from_array, lit, ref, to_stream, when};
require __DIR__ . '/../../../autoload.php';
data_frame()
->read(from_array([
['id' => 1, 'email' => '[email protected]', 'active' => true, 'tags' => ['foo', 'bar']],
['id' => 2, 'email' => '[email protected]', 'active' => false, 'tags' => ['biz', 'bar']],
['id' => 3, 'email' => '[email protected]', 'active' => true, 'tags' => ['bar', 'baz']],
]))
->collect()
->withEntry(
'is_special',
when(
ref('active')->isTrue()->and(ref('tags')->contains('foo')),
lit(true),
lit(false)
)
)
->write(to_stream(__DIR__ . '/output.txt', truncate: false))
->run();
Output
+----+---------------------+--------+---------------+------------+
| id | email | active | tags | is_special |
+----+---------------------+--------+---------------+------------+
| 1 | [email protected] | true | ["foo","bar"] | true |
| 2 | [email protected] | false | ["biz","bar"] | false |
| 3 | [email protected] | true | ["bar","baz"] | false |
+----+---------------------+--------+---------------+------------+
3 rows
Examples
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