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Software Development

A SwiftUI Charts Tutorial

A SwiftUI Charts Tutorial

The objective of this chapter is to demonstrate the main features of the SwiftUI Charts in the form of a tutorial. Topics covered include creating a chart, displaying data from multiple data sources, …
An Overview of SwiftUI Charts

An Overview of SwiftUI Charts

One of the best ways to present data is to do so in the form of a chart or graph. While it has always been possible, given sufficient time and skills, to generate charts in SwiftUI by writing your own …
A SwiftUI NavigationStack Tutorial

A SwiftUI NavigationStack Tutorial

The previous chapter introduced the List, NavigationStack, and NavigationLink views and explained how these can be used to present a navigable and editable list of items to the user. This chapter will …
SwiftUI NavigationStack and NavigationLink Overview

SwiftUI NavigationStack and NavigationLink Overview

The SwiftUI List view provides a way to present information to the user in the form of a vertical list of rows. Often the items within a list will navigate to another area of the app when tapped by …

Operating Systems

Ubuntu 20.04 System and Process Monitoring

An important part of running and administering an Ubuntu system involves monitoring the overall system health in terms of memory, swap, storage and processor usage. This includes knowing how to …

Adding and Managing Ubuntu 20.04 Swap Space

An important part of maintaining the performance of an Ubuntu system involves ensuring that adequate swap space is available comparable to the memory demands placed on the system. The goal of this …

Adding a New Disk to an Ubuntu 20.04 Volume Group and Logical Volume

In the previous chapter we looked at adding a new disk drive to an Ubuntu system, creating a partition and file system and then mounting that file system so that the disk can be accessed. An …

Adding a New Disk Drive to an Ubuntu 20.04 System

One of the first problems encountered by users and system administrators these days is that systems tend to run out of disk space to store data. Fortunately disk space is now one of the cheapest IT …