[Contradiction] Liskov Substitution Principle (LSP)

[peter-gribanov]

See Liskov Substitution Principle (LSP)

function renderLargeRectangles($rectangles) {
    foreach($rectangle in $rectangles) {
        if ($rectangle instanceof Square) {
            $rectangle->setLength(5);
        } else if ($rectangle instanceof Rectangle) {
            $rectangle->setWidth(4);
            $rectangle->setHeight(5);
        }
        
        $area = $rectangle->getArea(); 
        $rectangle->render($area);
    });
}

contradicts Avoid type-checking (part 1).

[TomasVotruba]

Could you send PR for that, please?

[peter-gribanov]

fixed in #101