It’s pretty easy to read the contents of a Linux text file line by line in a shell script—as long as you deal with some subtle gotchas. Here’s how to do it the safe way. Files, Text, and Idioms Each programming language has a set of idioms. These are the standard, no-frills ways to accomplish a set of common tasks. They’re the elementary or default way to use one of the features of the language the programmer is working with. They become part of a programmer’s toolkit of mental blueprints. Actions like reading data from files, working with loops, and swapping the values of two variables are good examples. The programmer will know at least one way to achieve their ends in a generic or vanilla fashion. Perhaps that will suffice for the requirement at hand. Or maybe they’ll embellish the code to make it more efficient or applicable to the specific solution they are developing. But having the building-block idiom at their fingertips is a great starting point. Knowing and … [Read more...] about How to Process a File Line by Line in a Linux Bash Script
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As a hobby, vintage computing is on the rise. A generation that grew up with classic PCs is looking back and revisiting the glory days of the ’80s, ’90s, and 2000s with the authentic machines. But what’s the best way to get the hardware? We’ll show you the options. The Catch: Many Vintage Computers Need Repair Before we begin, there are some “gotchas” you should know about buying vintage computers. Unless a machine has been shown to be in working condition, don’t buy it, because the older it is, the less likely it is to work as soon as you get it. That makes an “as-is” purchase risky for people who don’t have the technical background to repair or recondition a vintage PC. Almost no PCs were designed with three-decade longevity in mind. As a result, these sensitive electronic devices include components that degrade over time. Here are some frequent problems that pop up with vintage PCs: Plastics discolor or become brittle Rubber components or cables degrade and get … [Read more...] about What’s the Best Way to Buy a Vintage Computer?
Notifications have been a major part of Android since the beginning. They can be both a blessing and a curse, though. To help you fine-tune your experience, Android has a feature called “Notification Channels.” They make notifications a lot better. As smartphones and apps have evolved, so have notifications . In the early days, notification controls were pretty basic. You’d install an app and you could turn notifications on or off. As apps got more complex, so did the notifications. RELATED: How to Pause Notifications on Android Maybe you only want notifications for one specific thing from an app. Some apps have built-in granular notification controls, but not all of them do. And you’d also have to dig through that app’s settings, which might be organized in an unfamiliar way. Notification Channels aim to simplify this process and give more control to the users. What Are Notification Channels on Android? “Notification Channels” were introduced in 2017 with … [Read more...] about What Are Android Notification Channels?