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PHP Object-Oriented PHP Basics Building a Collection Collection Objects

Posted by Boban Rajovic
Boban Rajovic
360 Points

I don't understand 3/3 task , please help.

I don't understand what im getting from collection, i mean i know that roof_color and wall_colors are in collection , but i tried few options and it won't work.. can someone explain pls.

index.php 
<?php

// add code below this comment

class Subdivision {
    public $houses;

  public function filterHouseColor($color){

  }
}

?>

1 Answer

Spenser Hale
Spenser Hale
20,915 Points
Spenser Hale
Spenser Hale
20,915 Points

Hello Boban Rajovic,

TLDR: Check bottom example

$this->houses return an array of objects. In each house object it has property roof_color and wall_color. So you need to loop over houses property and either collect or filter out so the collection only contains houses with roof_color or wall_color of the color parameter.

Filter Example:

See: PHP Docs on array_filter

<?php
class Subdivision {
  public $houses;
  public function filterHouseColor($color) {
    return array_filter($this->houses, function($house) use($color) {
        return $house->roof_color === $color || $house->wall_color === $color;
    });
  }
}

Collect Example:

See: PHP Docs on foreach structure

<?php
class Subdivision {
  public $houses;
  public function filterHouseColor($color) {
      // Variable to store matches
      $matches = [];
      // Loop through collection setting object as local variable $house
      foreach($this->houses as $house) {
        // Check if either property matches $color
        if($house->roof_color === $color || $house->wall_color === $color) {
          // If matched add to matches collection
          $matches[] = $house;  
        }
      }
      // return the matches collection.
      return $matches;
  }
}