In this tutorial, we will take a couple of examples and demonstrate how you can if a file exists or not, with the help of Perl. Let's suppose we have a simple text file called "sample.txt" with the following data − This is a sample txt file that contains some ... Read More

In Perl, there are two ways to check if two arrays are equal. We can compare two arrays in Perl with the help of "Storable freeze" function or by creating our own custom function. In this tutorial, we will explore both these approaches with the help of examples. Example 1 ... Read More

Suppose we get a variable at runtime in Perl and we want to check if the value that it contains is numeric or not, then we can use the two approaches shown in this tutorial. We will use two simple examples to demonstrate how it works. Example  The most basic ... Read More

Let's consider a scenario where we would want to know if a Perl hash already contains a key or not. To do so in Perl, we can use the exists() function. In this tutorial, we will explore the exists function with the help of two examples. The exists() Function in ... Read More

In Perl, we can check whether an array contains a particular value or not with the help of the "grep" keyword. The grep function in Perl is used to filter the input supplied in the function as a parameter out of the list of items. Similar to Linux, it uses ... Read More

In most programming languages, we can use the "break" keyword to break out of any type of loop. In Perl too, we have the "break" keyword available, but the keyword that is used the most to break out of a loop is the "last" keyword. The "last" Statement in Perl ... Read More

Voca is a JavaScript library that is used for manipulating strings. In this tutorial, we will take multiple examples to show how you can use the different functions available in Voca. Features of Voca Before we see all the examples, let's highlight some features that Voca brings to the table ... Read More

Morgan is a middleware that is available for Node.js which is used when we want to log HTTP requests. It is mainly used in Express projects. Morgan helps us simplify the logging work of HTTP requests that come and sent from an application in a single statement. In normal situations, ... Read More

In this tutorial, we will explore some of the most commonly used and famous HTTP clients that are present in Linux. A HTTP Client is a software that is mainly used to allow us to download files from the Internet. The primary reason for using HTTP clients is generally to ... Read More

When it comes to Linux operating system, everything in general can be considered as a file. In UNIX, in total, there are seven standard file types −FIFO specialBlock specialCharacter specialSocketRegularDirectorySymbolic linkWhen it comes to Files, these can be mainly categorized into the following categories −Regular FilesDirectory FilesSpecial FilesThe simplest way ... Read More