Reading Time: 3 minutesIn inheritance, child class extends parent class so child class knows what parent class does and this knowledge creates dependency. If there would be a way where child class ignores the knowledge of what parent class does rather asks what …
Reading Time: 5 minutesI am writing this article after reading the book Practical Object-Oriented Design. Here, the aim is to provide code examples in PHP, as the original examples are in Ruby, using Sandi Metz‘s UML diagrams and her wisdom. Object-oriented application is …
Reading Time: 2 minutesGetters and Setters are not limited to provide access to the class’s attributes(variables) rather it is one way of encapsulating the data. Getters and Setters are not the PHP thing which will be dead rather it is an approach to …
Reading Time: 2 minutesUsually developers use different framework library to validate API requests data before executing any business logic. For example, Laravel framework uses validate method to validate HTTP requests. Similarly, Symfony uses validator component. There is an alternative way to validate without using …
Reading Time: < 1 minuteThe null object pattern aims to replace null with actual objects, objects that behave differently because they represent the “absence” of the real object. Another benefit of using this pattern is that classes become more representative of the real world. …
Reading Time: 3 minutesWe all are aware of the async nature of the javascript program execution through the Google V8 engine. It has a lot of advantages if we can use it properly otherwise the same async behavior can make a lot of …
Reading Time: < 1 minuteWhen you write a Node script to run generic shell commands it is worth knowing how to run multiple shell commands. child_process.exec(): spawns a shell and runs a command within that shell, passing the stdout and stderr to a callback function when complete. Please …
Reading Time: 3 minutesI am using a Macbook Pro with 128 GB disk space for 4 years. So, you can imagine the challenge of managing the disk space. On top of it when I have installed Docker, it is really hard to work …
Reading Time: 3 minutesIf we try to understand Javascript objects in a simple way, we can say it is a collection of properties(used to keep the state of the object) and methods(that give an object behavior). – Head First Javascript Programming I am …
