Home » 2021 » June

Linked Lists in Python – How to Use Them, With Examples

June 10, 2021 by Brad Morton

This article will explain in simple terms what linked lists are, why they’re useful, and how to use them in the Python programming language. Lists In Python, a list is an array of data – a simple list of values where each item has a value and a position in the list. Lists are indexed (so the positions start counting at position 0, not 1). For more information on lists in Python, check out these LinuxScrew articles: Python List ‘sort()’ Method – Sorting Lists in Python Easily … Read more

Home » 2021 » June

The uniq Command In Linux – Tutorial and Examples

June 10, 2021 by Brad Morton

This article will explain how to use the uniq command in Linux to find or filter repeated lines in files and provide some usage examples. The uniq command is a simple command which either outputs or omits repeated lines in the supplied input or file. uniq Command Syntax The syntax for the uniq command is as follows: uniq OPTIONS INPUT OUTPUT Note that: OPTIONS is a list of options from the below table INPUT should be the path to the file to be read *Standard input *can also be used OUTPUT should be … Read more

Home » 2021 » June

Multidimensional Arrays in PHP – How To Use, With Examples

June 9, 2021 by Brad Morton

This article will show you how to use multidimensional arrays in the PHP programming language, explaining what they are and how to use them. What is an Array? An array is a type of PHP variable that can hold multiple values. It’s a list of values you can loop through and perform operations on each individual value. For example, you might want to perform an action on a list of files. By storing that list as an array, you can loop through the file names … Read more

Home » 2021 » June

Converting a List to a String (and Back!) in Python [Examples]

June 8, 2021 by Brad Morton

This article will show you how to convert lists to a string in the Python programming language. Why would you want to convert a list to a string? Most commonly, because you want to print it or because you want to store it in a database text field or a text file. Converting List to String in Python The join() string method will take a list or iterable in Python and join each element, using the given string as a separator between each element. # Define a list of strings myList … Read more

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JavaScript onclick() Events – Tutorial, With Examples

June 8, 2021 by Brad Morton

JavaScript adds interactivity to web pages. This article shows you how to trigger JavaScript functions when an HTML element is clicked using onclick() events and attributes. Code examples included. JavaScript Events An event in JavaScript simply means that something has happened. The mouse has moved, or a key has been pressed, and JavaScript has been notified by the raising of an event. onclick Event When the user clicks on something, the onclick event is raised, allowing you to trigger some JavaScript code when an element is clicked. … Read more

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JavaScript vs Java – What’s the Difference Which to Use in 2021?

June 7, 2021 by Brad Morton

Here’s a clear article on what makes Java and JavaScript different – and some information to help you make the choice on which to learn and use for your projects in 2021. First up, it’s important to clarify that JavaScript and Java are not the same things! They just have similar names. It’s stupid, and they should have called JavaScript something else (and tried to re-badge it ECMA Script, which is also a terrible name), but the JavaScript name stuck. Now we’re all stuck with two different programming languages … Read more

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Delete Files Older Than X Days/Hours in Bash [Examples]

June 6, 2021 by Brad Morton

This article will show you how to delete files older than a given number of days (or hours/minutes) manually or automatically via a Bash script. Examples included. Removing files older than a certain number of days (or minutes, or hours) makes use of two Linux commands – rm and find. Deleting Files with rm First up, the rm command. The rm command is used to remove files and directories in Linux. Here’s a whole article about how it’s used: rm Command in Linux [With Examples] Passing a Filtered List of Files to rm The next … Read more

Home » 2021 » June

Bash Aliases – What They Are and How To Use Them

June 5, 2021 by Brad Morton

If you live in the Linux Shell/Terminal, aliases are a massive timesaver. Here’s how to create your own Bash aliases, with examples. What is an Alias in Bash/Linux Shell? An alias is a shortcut to a longer command. It’s similar to a keyboard shortcut – like the CTRL + C key combination is a shortcut to the copy command in many graphical operating systems (saving the time in dragging your mouse across the screen and clicking multiple menus to reach the command), aliases are shortcuts to longer terminal commands (saving time typing out the full … Read more

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OpenWrt: Set up a Basic Network Including WiFi Bridge, IP Address, DHCP

June 4, 2021 by Brad Morton

This article will show you how to configure a basic network with WiFi Bridging, DHCP on a fresh install of OpenWrt – with explanations and screenshots. This guide follows on from LinuxScrew’s guide to setting up OpenWrt on a BT HomeHub 5 – but you can follow along on any device (including a Raspberry Pi!). This article assumes you have an OpenWrt device you wish to start using. We’ll start by connecting it to your home WiFi network to get it online and then setting it … Read more

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OpenWRT: Secure DNS over TLS with LuCI [No Command Line]

June 3, 2021 by Brad Morton

This article will show you a quick and clean way of getting secure DNS over TLS running on OpenWRT – without resorting to the command line. If follows on from our other OpenWrt Articles. We’ll be using stubby – a local DNS resolver that will encrypt local DNS queries and forward them to an external secure DNS resolver Provided by Cloudflare. Why Cloudflare? Because it’s the default secure DNS resolver in the default stubby configuration, that means we don’t have to edit the config files, and Cloudflare’s servers … Read more