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Software Development

Building Context Menus in SwiftUI

Building Context Menus in SwiftUI

A context menu in SwiftUI is a menu of options that appears when the user performs a long press over a view on which a menu has been configured. Each menu item will typically contain a Button view …
Building Tabbed Views in SwiftUI

Building Tabbed Views in SwiftUI

The SwiftUI TabView component allows the user to navigate between different child views either by selecting tab items located in a tab bar or, when using the page view tab style, by making swiping …
A SwiftUI List, OutlineGroup and DisclosureGroup Tutorial

A SwiftUI List, OutlineGroup and DisclosureGroup Tutorial

The previous chapter covered the List, OutlineGroup and DisclosureGroup views and explored how these can be used to visually present hierarchical information within an app while allowing the user to …
An Overview of SwiftUI List, OutlineGroup and DisclosureGroup

An Overview of SwiftUI List, OutlineGroup and DisclosureGroup

The preceding chapters explored the use of the SwiftUI List view to display information to users in an ordered manner. Lists provide a way to present large amounts of information to the user in a …

Operating Systems

Ubuntu 20.04 Snap Package Management

The previous chapter explored the use of the Advanced Packaging Tool (APT) to install and update software packages on an Ubuntu system. In recent years a new package management system called Snap …

Ubuntu 20.04 Software Package Management and Updates

It is highly unlikely that a newly installed Ubuntu system will contain all of the software packages necessary to perform the tasks for which it is intended. Even once all the required software has …

Managing Ubuntu 20.04 systemd Units

In order to gain proficiency in Ubuntu system administration it is important to understand the concepts of systemd units with a particular emphasis on two specific types known as targets and. …

Managing Ubuntu 20.04 Users and Groups

During the installation of Ubuntu, the installer provided the opportunity to create a user account for the system. We should not lose sight of the fact that Ubuntu is actually an enterprise class, …

Indepth Guides