Year: 2021

Home » 2021

Python Main Function & Method: What Is It and How Is It Used?

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Python Main Function Method

As you build more complex Python apps, you will probably want to start splitting your code into separate files. What Is the __main__ Function? Importing and executing code from another file is common in even small scripts and apps built with Python. As your library of scripts increases, you may choose to import previously written code into new projects. The __main__ function in Python is only executed when the script is called directly, allowing you to set different behavior based on how your code is being … Read more

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How to Get User Input in Python [With Examples]

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Get User Input in Python

This article covers getting user input on the command line using Python 2 or 3 and includes some useful examples. Get User Input in Python 3 Python 3 uses the input() function to collect user input: myText = input(“Enter some text:”) print(“You entered the text: ” + myText) Get User Input in Python 2 If you’re still using Python 2, you will use the raw_input() function instead: myText = raw_input(“Enter some text:”) print “You entered the text: “, myText # Python 2 uses different syntax to print output Typing Input … Read more

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Assign Variables, Global Variables and Scopes in JavaScript (let, var, const)

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JavaScript let var const

let, var, and const are all JavaScript statements that assign a value to a variable. Their behavior can differ depending on how and where they are used in your code – read on to find out the details. Scopes in JavaScript As you start to build more complex applications, you’ll start to see a lot of talk about scopes. A variable’s scope defines where it is available in your application. Global Scope (Global Variables) If a variable is in the global scope, it is available anywhere in your application. It can be called … Read more

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Creating Multiline Strings in JavaScript [With Examples]

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Creating Multiline Strings in JavaScript

There are several ways to create text that spans multiple lines in JavaScript – so here they are! Method 1: Backticks This is the best method, so it goes first. It is only compatible with ECMAScript 6 and onwards, so it is only for use in modern browsers (really, if you’re using any browser that isn’t Internet Explorer, you should be fine, but you should always test your code on the browsers you want to target). var multiText = ` This is multiline text!`; console.log(multiText) // … Read more

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Python Scatter Plots with Matplotlib [Tutorial]

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Python Scatter Plots

Graphs are awesome. If you disagree, you probably shouldn’t read on. The best (and easiest!) way to create graphs and scatter plots in Python is using the package Matplotlib. This tutorial explains exactly how to do so. https://pypi.org/project/matplotlib/ What is matplotlib? I’ll let them introduce themselves in their own words: Matplotlib is a comprehensive library for creating static, animated, and interactive visualizations in Python. This article will give you a jump-start on using Matplotlib to create scatter plots. Install Python Dependencies First, you’ll need to install MatplotLib using … Read more

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PHP var_dump() Function [With Examples]

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PHP var dump Function

The PHP programming language includes various built-in variable types and allows you to create your own complex object classes. Third-party packages also come with their own object classes. So it’s useful to find out what type of variable a variable is, its value, and the type/value of any properties or values the variable may contain. The PHP var_dump() function returns a given variable or value’s properties, including the value and type. It works through the variable’s properties or value recursively doing the same. Read on to learn … Read more

Categories PHP

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How To Fix Broken Packages in Ubuntu [Tutorial]

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How To Fix Broken Packages in Ubuntu

Package managers like apt are one of the big selling points of Linux operating systems and Ubuntu – a vast curated collection of software that can do just about anything, available with a few keypresses. A vetted and (usually) reliable source of great software to meet any task. However, when something can go wrong, eventually it will go wrong. A package may only partially install or conflict with something else in your system environment. Maybe an update is pushed out that breaks an installation. When this happens, Ubuntu has a few … Read more

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Setting up a LAMP Stack on Ubuntu 20.04 (And Raspberry Pi)

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LAMP Stack on Ubuntu

This tutorial covers setting up a full LAMP (Linux, Apache, MySQL, PHP) web stack, including HTTP server, MySQL database, and PHP for app logic. This is commonly called a LAMP server – Linux, Apache, MySQL, PHP. Linux rules the web server world – the operating system powers the vast majority of web servers worldwide. Apache is a popular web server – the software with which web browsers connect to receive content. MySQL is a popular database server – it stores information in rows and columns inside tables. There is also a drop-in replacement … Read more

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touch Command in Linux and Bash [with Examples]

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touch Command in Linux

The touch command in Linux updates the timestamps on a file or creates the file if it doesn’t exist. See some examples and use cases below. It sounds useless, but it’s actually useful. For example, if you want to create an empty file called my_file.txt, you can just run: touch my_file.txt Easy! Updating the timestamps of a file is also useful. Say you have a file called favorite_tv.txt, which you use to keep the name of your current favorite TV show. Your favorite show 10 years ago was … Read more

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What Does “./” (Dot Slash) Mean in Linux?

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What Does Dot Slash Mean in Linux

In Linux, *./ (dot slash) represents the relative path to the current working directory. This article lays out exactly what it means and how to use it. . (dot) and .. (double-dot) . (single dot) and .. (double dot) are special directory names in Linux (And other *nix operating systems). . represents the current directory. .. represents the parent directory (of the current directory). ./ (dot slash) So, the . in ./ represents the *current& directory – and the slash is the path delimiter so that what follows will refer to the contents of the current directory. Example To edit … Read more