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In this article, we will explore some useful string functions in Ruby that are widely used to format data.Get the Length of the StringTo find the length of the string, we will use the size method.ExampleConsider the code shown below.str = "TutorialsPoint" puts str.sizeOutputIt will produce the following output.14 To Check Empty stringTo check if a string is empty, we use the size method and comparison operator.ExampleConsider the code shown below.str = "TutorialsPoint" puts str.size == 0OutputIt will produce the following output.false To Extract a Substring from StringTo extract a substring from a string, we will use square bracket notation.ExampleConsider ... Read More
Encapsulation is the ability to wrap the data into a single unit. In simple terms, it's a mechanism to wrap data and the code that manipulates the data. In Ruby, we can achieve encapsulation with the help of classes.Let's consider a very simple example where we will implement encapsulation.Example 1Consider the code shown belowclass Document attr_accessor :name def initialize(name) @name = name end def set_name(name) @name = name end end d = Document.new('TP') d.set_name('TutorialsPoint') puts d.nameOutputIt will produce the following output −TutorialsPointExample 2Let's consider one ... Read More
Abstraction is an object-oriented programming concept, where the essential attributes of something are shown and all the unnecessary ones are hidden. With this approach, one can hide the implementation details and provide only the important interface.A very good example of abstraction is your car. It's a great example of abstraction. When you start the car by turning the key or pressing the start button, you don't necessarily need to know how the engine works or how it gets started, also what components are present in that car or what else is there. These details that are irrelevant to the driver ... Read More
In addition to loops, conditionals, and iterators, Ruby has some statements that are used to change the control flow in a program. In other words, these statements are pieces of code that execute one after the other until a condition is met.In this article, we will explore the following control flow alterations in Ruby −break statementnext statementredo statementretry statementLet's consider each of these one by one.break statementWhen a condition is True in Ruby, the break statement terminates a loop.ExampleConsider the code shown below.# break statement example itr = 1 while true if itr * 6 >= 35 ... Read More
break Statement in RubyIn Ruby, we use the break statement in order to make sure that we exit a certain loop after a condition. For example, suppose we want to print the numbers from 1 to 10, but once we hit the number 5, we just don't want the loop to print any numbers that come after it. In such a case, we can use the break statement.Example 1Let's take an example and understand how the break statement works in Ruby. Consider the code shown below.# break statement in Ruby #!/usr/bin/ruby -w itr = 1 # while Loop ... Read More
Sometimes we may want to exact a portion from an array data and perform some operation on it. In Ruby, we can do that with the help of the slice() function that takes two arguments, both of them indices, that are used to define a subsequence which then can be extracted from the array.SyntaxThe syntax of the slice() function is shown below −res = Array.slice(x, y)Here, x and y denote the starting index and the ending index, respectively.Example 1Now that we know a little about the slice() function on arrays, let's take a couple of examples and see how to ... Read More
Sometimes we need to extract a portion of an array data and perform some operation on the extracted data. In Ruby, we can perform such operations with the help of the shift() function.The shift() function takes one argument, which is an index that is used to remove the first element from that index and return all the elements before it. If the index is somehow invalid, then it returns nil.SyntaxThe syntax of the shift() function is shown below −res = Array.shift(x)Here, the argument "x" denotes the starting index.Example 1Now that we know a little about the shift() function on arrays, ... Read More
This article guides you on what you should do to protect yourself if you think your system or device has been hacked. The focus of this article is on limiting the harm and containing the security incident.IP address is used by servers to send and receive data to and from your device. Nowadays, whether it is a financial institution or an informational website, each website with an online presence on the Internet needs a safe environment to exist—What may your IP address be used for, and how can you protect yourself from data breaches. Because this is a very prevalent ... Read More
Android is the most widely used operating system in the world. Android has been already installed on more than 3 billion devices, and the number is rising. There are a lot of things to like and prefer about Android. It is small and adaptable, and it works with anything from high-end smartphones to inexpensive phones under $100.Unfortunately, not everything in the Android world is perfect. While we doubt that it would convince you to jump ship and join Apple, it is something to keep in mind. We're referring to the large number of malicious apps discovered in the Google Play ... Read More
Computers slow down for a variety of reasons. Maybe you’ve unavoidably accumulated virtual trash when you download applications, install extensions, visit the web, create files, and fill your hard drive with multimedia, which will have an influence on your PC's performance. So, if you've been wondering, "Why is my computer so slow?" then go through this article to find out the causes and the easy steps you can take to speed things up.Why Do Computers Slow Down?Let's identify the most prominent causes that can slow down a computer −Excessive Number of Starting ProgramsNewly downloaded apps frequently try to sneak their ... Read More