Attempting to access an empty array in PHP will probably cause an error to be thrown. It is therefore good practice to c...

Using certain utilities and operators requires newer versions of Python and some modules/packages will only work on part...

It is important to know what version of Ubuntu your system is running if you are planning to install software or want to...

In this tutorial, we will learn how to refresh a page with JavaScript. The easiest way to reload a page in JavaScri...

It is possible to get various substrings from a string using the substr() utility in PHP. In this tutorial, we will...

You can get the length of a string in PHP using the built-in strlen() utility. It takes one required argument, a string,...

It is useful to be able to quickly find out what packages are currently installed on your Ubuntu system, especially if y...

Linux only shows the size of the metadata for directories when using the ls command, not the size of its contents. The c...

Sometimes it is necessary to change the PHP version used by one or many web applications on a server. This could be due...

Some files are hidden in macOS by default. This could be due to the file beginning with a . (dot), for security reasons,...

Sublime is a powerful text editor for programmers offering advanced functionality including the ability to customise its...

Converting to lowercase and uppercase is a common task in JavaScript. This could be for preparing strings for case insen...

Sometimes it is necessary to find out if a string contains a word or another substring in JavaScript. Fortunately, JavaS...

The JavaScript reduce() method provides a clean way to loop through an iterable and do something with each value in a fu...

Base64 encoding is used to convert strings containing text and numerical data into ASCII characters. This is useful when...

The Python zip() method is used to combine iterables into an object of tuples. What makes this method powerful is that a...

The string strip() method in Python removes the leading and trailing characters from a string and returns a new string....

In most cases, JavaScript does not have direct access to local files on a users machine for obvious security reasons. It...

A promise in an asynchronous task in JavaScript that will return a Promise object, which can be accessed using the then(...

In order to compare arrays in JavaScript, we first have to define what we want to compare – should the comparison be bas...

The modulus operator in JavaScript, also known as the remainder operator returns the remainder of a division. In this tu...

Sometimes you might need to check, revert or reset a commit in your Git repository. This could be due to a mistake or be...

In the previous tutorial, we covered how to add modified files to the staging area in Git and in this tutorial we will l...