to all your problems. • Do not try to force them.Keep in mind that design patterns are solutions to problems. • If used in a correct place in a correct manner, they can prove to be a savior or else they can result in a horrible mess of a code.
the computer? "Hit the power button" you say! That is what you believe because you are using a simple interface that computer provides on the outside, internally it has to do a lot of stuff to make it happen. This simple interface to the complex subsystem is a facade.
1) stopPropagation() - traps the event and doesn't let it bubble up to the parent nodes 2) preventDefault() - doesn't let the browser do the default action (for example, following a link or submitting a form) There are two separate methods with different purposes and they should be kept separated, but at the same time, they are often called together. So instead of duplicating the two method calls all over the application, you can create a facade method that calls both of them:
of a pizza shop.As per the decorator pattern, you will implement toppings as decorators and pizzas will be decorated by those toppings' decorators. Practically each customer would want toppings of his desire and final bill-amount will be composed of the base pizzas and additionally ordered toppings. Each topping decorator would know about the pizzas that it is decorating and it's price.
for this pattern. If you have a three-pronged electrical plug, it won’t fit in a two-prong wall outlet. Instead, you need to use a travel adapter to convert energy from the wall outlet to the plug you have.