The map is a well known functional programming concept that is incorporated into Java 8. Map is a function defined in java.util.stream.Streams class, which is used to transform each element of the stream by applying a function to each element. Because of this property, you can use a map() in Java 8 to transform a Collection, List, Set, or Map. For example, if you have a list of String and you want to convert all of them into upper case, how will you do this? Prior to Java 8, there is no function to do this. You had to iterate through List using a for loop or foreach loop and transform each element. In Java 8, you get the stream, which allows you to apply many functional programming operators like the map, reduce, and filter.
Top 5 Courses to learn Scrapy with Python in 2020 - Best of Lot
Hello guys, web scraping is one of the useful skills and you can use it for many different projects. For example, you can use web scraping to find the cheapest flight between the two countries, find the cheapest hotels and holiday packages. Python makes it easy to scrape data from the website and store it. There are also many tools built-in there that can do web crawling and scraping and one of the best tools called Scrapy. This tool is a free and open-source tool written in python for web scraping and crawling purposes and you can use it to extract data from any website.
What is Overloading, Overriding, Hiding, Shadowing and Obscuring in Java and Object-Oriented Programming?
Hello guys, today, I am going to explain a couple of fundamental object-oriented programing concepts in Java like Overloading, Overriding, Hiding, Shadowing, and Obscuring. The first two are used in the context of a method in Java while the last three are used in the context of variables in Java. Two methods with the same name and same class but the different signature is known as overloading and the method is known as an overloaded method while a method with the same name and same signature but in parent and child class is known as overriding. On the other hand, Hiding is related to overriding since the static and private method cannot be overridden, if you declare such methods with same name and signature in parent and child class then the method in the child class will hide the method in the parent class.
Top 5 Courses to learn Linux in depth - Best of Lot
As a Linux professional user or expert, there are many jobs out there that you can have such as the Linux system administrator that his job is taking care of every computer on the organization that runs on Linux such as managing superuser or Root and enhance the infrastructure of the servers and more. On the other hand, you can work as a Linux system engineer and your job is performing remote troubleshooting, determine solutions for any problem they had in their Linux systems, and more.
How to convert ArrayList to HashMap and LinkedHashMap in Java 8 - Example Tutorial
One of the common tasks in Java is to convert a List of objects, like a List<T> into a Map, I mean Map<K, V>, where K is some property of the object and V is the actual object. For example, suppose you have a List<Order>, and you want to convert it into a Map, e.g. Map<OrderId, Order>, how do you that? Well, the simplest way to achieve this is iterating over List and add each element to the Map by extracting keys and using the actual element as an object. This is exactly many of us do it in pre-Java 8 world, but JDK 8 has made it even simpler.
5 Essential Machine Learning Algorithms for Programmers
Hello guys, you may know that Machine Learning and Artificial Intelligence have become more and more important in this increasingly digital world. They are now providing a competitive edge to businesses like NetFlix's Movie recommendations. If you have just started in this field and looking for what to learn then I am going to share 5 essential Machine learning algorithms you can learn as a beginner. These essential algorithms form the basis of most common Machine learning projects and having a good knowledge of them will not only help you to understand the project and model quickly but also to change them as per your need.
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