mezon / functional
Small and fast framework for functional programming
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Requires
- php: >=7.2.0
Requires (Dev)
- infection/infection: ^0.21.5
- phpunit/phpunit: ^8.5
- vimeo/psalm: ^4.2
README
Intro
This class provides various members and tools for functional programming. It will help you to work with arrays in a very simple way.
Modes
Here we can fetch specified field from all objects of array:
$obj1 = new stdClass(); $obj1->foo = 1; $obj2 = new stdClass(); $obj2->foo = 2; $obj3 = new stdClass(); $obj3->foo = 3; $Data = array( $obj1 , $obj2 , $obj3 ); // will display array( 1 , 2 ,3 ) var_dump( \Mezon\Functional\Fetcher::getFields( $Data , 'foo' ) );
We can also set fields with multyple values:
$Values = array( 1 , 2 , 3 ); $obj1 = new stdClass(); $obj2 = new stdClass(); $Data = array( $obj1 , $obj2 ); Functional::setFieldsInObjects( $Data , 'foo' , $Values ); // will display 3 objects var_dump( $Data );
And fianlly we can sum specified fields:
$obj1 = new stdClass(); $obj1->foo = 1; $obj2 = new stdClass(); $obj2->foo = 2; $obj3 = new stdClass(); $obj3->foo = 3; $Data = array( $obj1 , $obj2 , $obj3 ); // will display value 6 var_dump( Functional::sumFields( $Data , 'foo' ) );
Note that you can recursively walk along the nested arrays:
$obj1 = new stdClass(); $obj1->foo = 1; $obj2 = new stdClass(); $obj2->foo = 2; $obj3 = new stdClass(); $obj3->foo = 3; $Data = array( $obj1 , array( $obj2 , $obj3 ) ); // will display value 6 var_dump(Functional::sumFields( $Data , 'foo' ));
And this code will also work:
// will display value 3 var_dump(Functional::sumFields( [ ['foo'=>1], ['foo'=>2] ] , 'foo' ));
Transformations
We can also transform objects in arrays like this (the most basic and simple way):
/** * Transformation function multiplies 'foo' field. */ function transform2x( $Object ) { $Object->foo *= 2; return( $Object ); } $obj1 = new stdClass(); $obj1->foo = 1; $obj2 = new stdClass(); $obj2->foo = 2; $obj3 = new stdClass(); $obj3->foo = 3; $Data = array( $obj1 , $obj2 , $obj3 ); Functional::transform( $Data , 'transform2x' ); // will display 3 objects // with 2, 4 and 6 values in their 'foo' fields var_dump( $Data );
But if you need more complex transformations, you can use class Transform. It will allow you to build entirely new array.
$data = [ 1 , 2 ]; Transform::convert($data,function($item){return [10*$item, 100*$item];}); var_dump($data); // will output // [10=>100 , 20=>200]
And if you want to transform only elements of the array, then use Transform::convertElements
$data = [ 1 , 2 ]; Transform::convertElements($data,function($item){return 10 * $item;}); var_dump($data); // will output // [0=>10 , 1=>20]